IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 23 August 2010 (all times are UTC)
| 00:10 | <nutron> what's the command to disable acceleration via the lts.conf file?
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| 02:37 | <biomorph_> Morning all.....
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| 02:37 | <Appiah> morning
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| 02:37 | <alkisg> Good morning
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| 02:37 | <biomorph_> I have a problem that occasionally I get an "Error: failed to connect to NBD server"
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| 02:38 | <alkisg> Occasionally? Not always? Check if you have another dhcp server on your thin client subnet
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| 02:38 | <biomorph_> Mmm..... Ah - that's an interesting one.....
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| 02:40 | Yes I think that could explain it..... Doh - why didn't I think of that.
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| 02:42 | OK - the reason I am trying to do this is that I get crashes on some machines, but not others. I am convinced this is caused by https://wiki.ubuntu.com/X/Bugs/Lucidi8xxFreezes
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| 02:42 | Anybody else seeing crashes/freezes when using Intel graphics chips.
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| 02:44 | <alkisg> Yes, I had to use a ppa kernel for my wife's laptop which has intel 855
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| 02:45 | <alkisg> Hey, new fixes there... we need to send feedback to them :)
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| 02:45 | <biomorph_> alkisg: is there an upstream bug report I could follow to see when it gets fixed?
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| 02:46 | <alkisg> biomorph_: I don't know, but we're supposed to test those proposed fixes to get them upstream
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| 02:46 | Otherwise they'll just drop them
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| 02:46 | (it's been done before...)
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| 02:46 | <biomorph_> alkisg: And what kernel do you use?
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| 02:47 | I've had some success using kms for the intel chip.
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| 02:47 | <alkisg> Can't check now, I can tell you in 30' if you're still here
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| 02:47 | <biomorph_> I will be, thanks.
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| 02:47 | <alkisg> I tried nomodeset etc, only limited success. With the newer kernel everything was solved, it's been running for months without problems
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| 02:56 | <alkisg> biomorph_: I've been using this kernel: https://launchpad.net/~brian-rogers/+archive/experimental But as I read on the bug reports (e.g. https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/511001) that's not recommented, the best is to test the drivers from the wiki page
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| 03:02 | <biomorph_> OK - I'm going to try enabling KMS - that works best for me at home.
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| 03:03 | So my question is is there any point in enabling it in /etc/modprobe.d/i915-kms.conf or should I just do it in /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default
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| 03:03 | Problem with second option is that that gets overwritten every time I run ltsp-update-image
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| 03:07 | <alkisg> $ grep BOOTPROMPT_OPTIONS /etc/ltsp/ltsp-update-image.conf
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| 03:07 | BOOTPROMPT_OPTIONS="quiet splash nbd_proxy=false"
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| 03:08 | You can put it there ^^^
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| 03:09 | <biomorph_> alkisg: Thanks I was looking for that. Didn't want to change the actual script, but did think about it.
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| 03:09 | <alkisg> But really, reporting back is the only way to avoid the problem in the future.
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| 03:10 | <biomorph_> I've reported my experience of the legacy driver to ubuntu-x list
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| 03:12 | OK - I'm off to try this on the real system. Back in an hour or so.
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| 06:02 | <biomorph_> OK - I'm back. One little annoyance I have is that if I log on to the client (I have enabled a root password) it is defaulting to US keyboard. Anybody know quickly how I change that to a UK keyboard?
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| 06:06 | <alkisg> biomorph_: about the intel 855 card, I tried the new workarounds with mine and the best one was still to use the new patched kernel - otherwise I it crashed with XV
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| 06:06 | !lts.conf
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| 06:06 | <ltspbot> alkisg: "lts.conf" :: http://manpages.ubuntu.com/lts.conf
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| 06:06 | <alkisg> For the keyboard, see the man page
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| 06:07 | (otherwise run dpkg-reconfigure console-setup on the chroot, or specify a locale when running ltsp-build-client)
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| 06:15 | <biomorph_> alkisg: Thanks for both bits of info. Intel drivers are really getting me annoyed. KMS certainly fixes one problem. I'm going to have to leave the customer to test whether it works for a full day.
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| 06:15 | <alkisg> What have you tried? Disabling KMS?
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| 06:17 | <biomorph_> No - I've tried enabling KMS. With KMS disabled if I switch between VT7 and VT1 before logging on to the LDM screen I was get a crash when I go back to the LDM screen.
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| 06:17 | KMS enabled I never get that crash.
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| 06:18 | <biomorph_> sorry on first post s/was/always/
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| 06:19 | <alkisg> Maybe you have a diffent model than mine then, I have KMS enabled by default but X crashes before ldm.
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| 06:21 | <biomorph_> Yes these are old DELL machines.... 00:02.0 VGA compatible controller: Intel Corporation 82865G Integrated Graphics Controller (rev 02) works fine
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| 06:21 | 00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01) crashes 4 times a day.
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| 06:22 | <biomorph_> It is so annoying we have considered buying cheap graphics cards on EBay
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| 06:22 | These machines worked with no problems until update to Lucid.....
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| 06:23 | <alkisg> Yeah that GEM change :-/
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| 06:23 | I've 855, different symptoms, and again wouldn't work on lucid without that patched kernel
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| 06:35 | <guntbert> hi (base system ubuntu 10.04), what happened to the option in the alternate installer (install LTSP) as per https://help.ubuntu.com/community/UbuntuLTSP/LTSPQuickInstall? should LTSP be installed in a different way now?
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| 07:15 | <guntbert> got it, it seems to be a bug in the installer (https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/573764, including a workaround)
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| 07:43 | <intelliant> intelliant: the logon / logoff problem seems to have resurfaced
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| 07:43 | intelliant: last fix tried was disabling compiz - sudo gconftool-2 --direct --config-source xml:readwrite:-/etc/gconf/gconf.xml.mandatory --type string --set /desktop/gnome/session/required_components/windowmanager metacity
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| 07:43 | intelliant: it is worth noting that compiz had been removed from the system
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| 08:01 | <alkisg> !compiz
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| 08:01 | <ltspbot> alkisg: "compiz" :: if compiz is giving you problems, one way to disable it for all users is: sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --type string --set /desktop/gnome/session/required_components/windowmanager metacity
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| 08:02 | <alkisg> Note that there's no "-" after "readwrite:"
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| 08:12 | <intelliant> when i give that i get an error
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| 08:13 | <alkisg> What error? Can you put the whole command and the result to pastebot?
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| 08:13 | !pastebot
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| 08:13 | <ltspbot> alkisg: "pastebot" :: The LTSP pastebot is at http://ltsp.pastebin.com. Please paste all text longer than a line or two to the pastebot, as it helps to reduce traffic in the channel. Don't forget to paste the URL of the text here.
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| 08:18 | <intelliant> http://ltsp.pastebin.com/SFt2UE22
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| 08:18 | <alkisg> intelliant: you're giving the wrong command
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| 08:19 | You're putting an extra "-"
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| 08:19 | Please paste the following command, which is correct:
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| 08:19 | sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --type string --set /desktop/gnome/session/required_components/windowmanager metacity
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| 08:21 | <intelliant> http://ltsp.pastebin.com/VXJi5qYX
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| 08:21 | ^ is this okay?
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| 08:22 | <intelliant> in my IM, the portion after readwrite is converted into a smiley
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| 08:22 | may be that is a messup
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| 08:22 | <alkisg> intelliant: let me space it: readwrite : /etc/
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| 08:22 | <intelliant> okay that works fine
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| 08:22 | <alkisg> You're putting an extra "-": readwrite : - /etc/
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| 08:22 | <intelliant> but yet the result is the same
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| 08:22 | i removed it
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| 08:22 | i realised that it was a mistake
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| 08:23 | <alkisg> No, the one works and the other doesn't
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| 08:23 | It's a wrong path so it's not working
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| 08:24 | <intelliant> agreed, the one without '-' has successfully executed but yet the logoff problem remains
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| 08:25 | <alkisg> No argument there, I just thought I'd tell you about the mistake in the compiz command
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| 08:25 | Compiz never helped in logoff problems though
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| 08:25 | So what is your logoff problem?
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| 08:28 | <intelliant> it is wierd, at times it simply throws me off with http://ltsp.pastebin.com/j6dQCZQ5
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| 08:28 | at others it will do this http://ltsp.pastebin.com/7D5pJRHh
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| 08:29 | the ldap server is very much available and accessible to several applications consistently
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| 08:29 | in the 2nd case at the TC, after entering the username and password, the eternal wait begins
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| 08:29 | it never seems to timeout as well
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| 08:30 | <thunsucker> intelliant: i just jumped in and didn't see everything you said but most of the time errors like this for me in the past meant dns or network issues
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| 08:30 | intelliant: is it happening with all TC's are just a few or random?
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| 08:30 | *or just a few
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| 08:30 | <intelliant> intelliant: it is wierd, at times it simply throws me off with http://ltsp.pastebin.com/j6dQCZQ5
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| 08:30 | intelliant: at others it will do this http://ltsp.pastebin.com/7D5pJRHh
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| 08:31 | ^^ thunsucker
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| 08:31 | <thunsucker> intelliant: so it's randomly happening with each TC then?
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| 08:31 | <intelliant> tried with 2 of them with diff hw
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| 08:31 | so it is consistent with 2 TCs
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| 08:31 | <thunsucker> intelliant: at login correct?
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| 08:31 | <intelliant> yes
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| 08:32 | <thunsucker> is this a new setup
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| 08:32 | or new problem
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| 08:32 | <intelliant> yes
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| 08:32 | ltsp-cluster
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| 08:32 | <thunsucker> okay new setup then
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| 08:32 | distro?
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| 08:32 | <intelliant> 10.04
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| 08:32 | ubuntu
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| 08:32 | <thunsucker> what guide did you use to interface ltsp with ldap?
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| 08:33 | <intelliant> https://help.ubuntu.com/community/LDAPClientAuthentication#Notes%20for%207.10%20and%20later
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| 08:35 | <thunsucker> intelliant: and you're using this ldap server with other applications?
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| 08:35 | <intelliant> yes successfully
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| 08:35 | <thunsucker> using a firewall on it?
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| 08:35 | <intelliant> yes
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| 08:35 | but only external
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| 08:35 | this is internal lan and all open for the lan
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| 08:37 | <thunsucker> intelliant: have you updated the chroot?
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| 08:38 | <intelliant> not after installing this new appserver
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| 08:38 | <thunsucker> intelliant: let me be more specific, have you updated the ltsp chroot
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| 08:39 | <intelliant> i just made an entry in /etc/ltsp/lbsconfig.xml
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| 08:39 | updated after what?
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| 08:40 | you mean /opt/ltsp/i386 ?
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| 08:40 | <thunsucker> intelliant: i meant sudo ltsp-update-image
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| 08:40 | intelliant: after going into the chroot and doing ubuntu updates: apt-get update && apt-get dist-upgrade
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| 08:40 | <intelliant> okay not done as yet
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| 08:42 | <thunsucker> https://help.ubuntu.com/community/UbuntuLTSP/UpdatingChroot
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| 08:42 | skip the part about recreating the chroot
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| 08:42 | a lot of people never update their chroot, but i do it often
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| 08:44 | <intelliant> I am a regular opensuse user, this is my second attempt at ubuntu in 3 years. I always seem to face a lot of issues with the package managers in the ubuntu world
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| 08:45 | <thunsucker> intelliant: the easiest way I've found is to do: sudo apt-get update , sudo apt-get dist-upgrade
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| 08:45 | I've never ran into a problem
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| 08:45 | you can also use the built in update manager but I don't like it
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| 08:45 | <intelliant> and i somehow have landed in so much trouble recently
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| 08:45 | <thunsucker> intelliant: is your ltsp server virtualized?
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| 08:45 | <intelliant> sure i too like apt-get update && apt-get dist-upgrade
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| 08:45 | yes
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| 08:46 | <thunsucker> intelliant: then why worry, take a snapshot for a backup
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| 08:46 | <intelliant> kvm
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| 08:46 | <thunsucker> I've always had bad luck with kvm
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| 08:46 | <[GuS]> Hi guys, any Gentoo expert on LTSP? Every time i build a client, when installing the packages i have: "warning: setlocale: LC_ALL: cannot change locale (es_AR)" Anyway to fix this?
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| 08:46 | <thunsucker> what disto you running it on
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| 08:47 | [GuS]: wow I found nothing on google with that lol
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| 08:47 | <[GuS]> thunsucker: :P eithe me
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| 08:47 | either*
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| 08:48 | <thunsucker> [GuS]: okay found something, seems more like a gentoo issue than ltsp let me read
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| 08:48 | <[GuS]> yeah... is what i guess
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| 08:48 | <thunsucker> go a prompt and type: locale as root
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| 08:48 | what do you get?
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| 08:48 | <[GuS]> but in my system i have correctly setup the env with es_AR
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| 08:48 | thunsucker: i get all with es_AR
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| 08:49 | <thunsucker> [GuS]: found this link, there are 2 suggested very easy fixes , http://www.linuxquestions.org/questions/linux-general-1/locale-cannot-set-lc_all-to-default-locale-no-such-file-or-directory-218622/
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| 08:52 | <[GuS]> thunsucker: well that is kind old, and i dont have the folder /etc/defaults/locale :P
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| 08:52 | i will digg a little about this
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| 08:58 | <thunsucker> [GuS]: you might also want to try a gentoo room
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| 08:58 | join #gentoo
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| 08:58 | <[GuS]> i am in there :D
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| 09:00 | <thunsucker> [GuS]: i meant post your question there
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| 09:00 | <alkisg> [GuS]: if it's a problem with the gentoo version of the ltsp-build-client system, then you can bypass it by using `ltsp-build-client --locale C` and installing your locale to the chroot later on.
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| 09:01 | <[GuS]> alkisg: ok, i will do so.
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| 09:06 | <intelliant> intelliant: thunsucker: i will try the update and revert
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| 09:06 | intelliant: as of now the server restarted and I seriously suspect the ubuntu ltsp servers because as fasr as i can recall, whenever I have been working with them this problem has occurred.
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| 09:12 | <thunsucker> intelliant: my apologies but I do not have any experience with ldap and ltsp
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| 09:12 | intelliant: i'm just good at reminding people of the basics
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| 09:17 | <intelliant> thunsucker: no problem
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| 09:17 | thanks for your help
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| 09:18 | <thunsucker> intelliant: yw hope you get your issues worked out
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| 09:19 | <intelliant> i hope i get success with ubuntu this time around, as I seriously wanted to give it a shot after 3 years of fun with opensuse
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| 09:19 | else opensuse does work for me and am abs confident about it
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| 09:22 | <alkisg> You can also ask in #ubuntu-server about LDAP, as setting up ldap is not really related to ltsp
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| 09:23 | <intelliant> alkisg: yes that would be a good idea
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| 09:23 | <alkisg> The thin clients connect to the server, so if the server has been setup correctly, they'll just login without knowning anything about ldap
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| 09:23 | <intelliant> but am not sure if this is purely ldap issue
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| 09:23 | as the other day the gconf setting did the trick
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| 09:24 | but i am unable to trace what changed between that day and today- over 3 days
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| 09:24 | i did not make any changes at all
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| 09:25 | <alkisg> Compiz problem appear at once when logging in
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| 09:25 | Not after a while. Is that the case for you?
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| 09:25 | <intelliant> i am confused
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| 09:25 | i shall redo the entire sequence once the chroot has been updated
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| 09:25 | <alkisg> And also they're consistent. For each user/pc combination, they either always occur, or never occur.
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| 09:25 | <intelliant> and then revert
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| 09:29 | alkisg: thunsucker: what's this supposed to mean
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| 09:29 | Built in to Ubuntu 10.04
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| 09:29 | Ubuntu 10.04 already has the ability to provide recommended updates by default. The rest of the instructions on this page are not necessary.
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| 09:29 | https://help.ubuntu.com/community/UbuntuLTSP/UpdatingChroot
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| 09:30 | <alkisg> Probably someone misunderstood the "installing recommented dependencies by default since 8.10" with "updating everything automatically" :D
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| 09:30 | Just delete it, it's wrong
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| 09:31 | <thunsucker> intelliant: ignore it
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| 09:31 | <intelliant> OMG, the documentation here is so awry
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| 09:32 | <alkisg> Ah, got it, he meant about sources.list
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| 09:32 | The rest of the page still apply though
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| 09:32 | <intelliant> pls rectify it as it should be
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| 09:32 | I am confused
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| 09:35 | <thunsucker> intelliant: ignore the note and just keep going down the page
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| 09:47 | <intelliant> i have deleted all VMs and am planning a complete reinstall after 2 days
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| 09:47 | 2 days server under observation for kvm related issues
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| 09:48 | thanks for your guidance, will keep you updated
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| 09:50 | <thunsucker> intelliant: just remember to update eveything, I've always had the best experience when doing that
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| 09:50 | <intelliant> will do
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| 10:03 | <[GuS]> guys, i have a small problem when i setup another SERVER in ltsp than the local one. When logins in LDM, its restarts later: http://pastebin.com/dYYWtEqn Any tip?
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| 11:27 | <intelliant> alkisg: can u confirm if these instructions - https://help.ubuntu.com/community/UbuntuLTSP/LTSP-Cluster - should work as is for 10.04
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| 13:32 | <rpm_> Is there a trick to getting EdUbuntu 10.04 ltsp to work properly? I am getting an NBD error when I try to boot my thin clients. Any help would be appreciated.
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| 13:43 | <johnny> be more specific, and stick around for an answer
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| 13:52 | <rpm_> Here is the error Error: Failed to connect to NBD server, and then it says something about busybox
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| 13:56 | <johnny> and on your edubuntu server, your /etc/inetd.conf references nbd ?
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| 13:56 | and not just nbd-swap
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| 13:56 | if so, how many dhcp servers do you have?
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| 14:01 | <rpm_> Thanks Johnny, I am asking this question after the fact, I was in a rush on Friday to get a server up and running and kept getting that error. I ended up having to revert to 9.10 but I want to go to 10.04, as a result I don't have it running any more. I will be trying again in the near future so I thought I'd ask before hand what could cause that. I found the same error on alot of different forums but no real answers, is editing the ine
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| 14:02 | <johnny> haven't heard of any such problem specific to lucid
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| 14:04 | <rpm_> What do you think about uninstalling NBD all together? Do you think that might help, if I run into the problem again?
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| 14:05 | <johnny> no
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| 14:05 | <grantk> Hey all, Anyone know of good place to look for ltsp cluster install info, I was noticing it had a lucid package but was on the website and not seeing much as far as install is concerned?
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| 14:10 | <Appiah> read the "setup on openvz"
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| 14:10 | <rpm_> hey grantk, the best writeup for cluster I have found is on the ltsp cluter homepage, unfortunately it isn't using 10.04 so you
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| 14:10 | you'll have to apply what is there to 10.04 as see if it works
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| 14:10 | <Appiah> I used it to get hang on how ltsp-cluster works and installed on 10.04
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| 14:10 | worked
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| 14:10 | <grantk> cool, sounds good!
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| 14:10 | <rpm_> good luck
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| 14:11 | <Appiah> I should do it again and document it ...
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| 14:11 | <grantk> I will be documenting for work here so if It works out well I'll send what I did to the mailing list
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| 14:12 | <alkisg> rpm_: for nbd I've seen 3 possible problems: (1) wrong /etc/inetd.conf configuration, (2) wrong dhcp setup (either dhcpd.conf or multiple servers), and (3) nbd-proxy problems. The first 2 are the most common, and are really easy to fix. For (3) there's a bug report in launchpad, but it's not very common.
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| 14:13 | <grantk> alkisg: Just curios, missed the nbd talk here, what problem comes from multiple dhcp servers?
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| 14:14 | <alkisg> Hmmm maybe I'll just commit an message "Cannot connect to nbd server <IP>", that will help many people that have problem (2).
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| 14:14 | <johnny> alkisg, nie idea
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| 14:14 | <grantk> ah, cool, thanks
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| 14:14 | <alkisg> grantk: the client might get confused and try to load the nbd image e.g. from a router
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| 14:14 | <grantk> oh, even better!
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| 14:15 | <johnny> alkisg, but if it works on 9.10, and not 10.04, then it's probably not that?
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| 14:16 | <alkisg> I've seen a lot of people saying that, while they just had problems #1 or #2...
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| 14:19 | <rpm_> alksig: here is the question Here is the error Error: Failed to connect to NBD server, and then it says something about busybox
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| 14:21 | <alkisg> rpm_: yes, see what I wrote above, there are 3 possible causes to that message that I've seen so far.
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| 14:21 | I'll change it to: panic "Error: failed to connect to NBD server $NBD_CLIENT_ROOT_SERVER:$NBD_ROOT_PORT."
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| 14:21 | That will help people with cause #2.
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| 14:21 | <rpm_> sorry, thanks.
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| 14:22 | I know my dhcp server is working right so I think it may be the first, what do I need to change in the inetd.conf file?
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| 14:24 | <johnny> paste the one that doesn't work
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| 14:24 | once you reinstall
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| 14:24 | <alkisg> Are you absolutely sure there's no other dhcp server around?
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| 14:26 | <rpm_> absolutely sure. I don't have the 10.04 server up anymore because I had to get something working for today so I put 9.10 on it instead and it is working fine. I am planning on putting 10.04 on in the very near future so I am asking in advance in case I run into the problem again.
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| 14:27 | <alkisg> 64 bit or 32 bit?
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| 14:27 | <rpm_> 64bit
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| 14:27 | <alkisg> With 32bit clients?
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| 14:27 | <rpm_> 32 bit
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| 14:28 | <alkisg> grep nbd /etc/inetd.conf
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| 14:28 | 9572 stream tcp nowait nobody /usr/sbin/tcpd /usr/sbin/nbdswapd
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| 14:28 | 2000 stream tcp nowait nobody /usr/sbin/tcpd /usr/sbin/nbdrootd /opt/ltsp/images/i386.img
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| 14:28 | On a default 64bit installation, you'll get /opt/ltsp/images/amd64.img there
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| 14:28 | That's one of the possible problems, you'd need to change that to i386
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| 14:28 | <rpm_> I did
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| 14:29 | <alkisg> On the busybox prompt, you would then try this: nbd-client server-ip 2000 /dev/nbd0
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| 14:29 | If that works, it's a dhcp problem. Otherwise it would be either an nbd-proxy problem, or an upstart or a module problem.
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| 14:30 | If you reinstall, come here so that we help you troubleshoot it...
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| 14:30 | <rpm_> thanks, you've been very helpful! :-)
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| 14:45 | <alkisg> Done, http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/revision/1774/client/initramfs/scripts/ltsp_nbd
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| 15:28 | <litercola> anybody in here?
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| 15:30 | I have an ubuntu 10.04 ltsp server that I installed with the alternate cd. Having some networking issues, and was wondering if I can make this work as my default dhcp server, which also needs to serve up a separate image
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| 15:30 | <grantk> litercola, yes you can
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| 15:30 | I have mine serving up some images for a phone system
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| 15:30 | <litercola> thanks, that's pretty cool
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| 15:31 | what distro are you using?
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| 15:31 | <grantk> ubuntu 10.04
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| 15:31 | <litercola> I have had alot of trouble with dhcp3 server not wanting to start up on boot
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| 15:32 | <grantk> I have actually had that happen recently and then it just stopped, I did not find any complaints in dmesg and logs
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| 15:33 | <litercola> in syslog mine tells me that dhcp is not listening on any interface
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| 15:34 | but when i restart it says stopping: faild, starting ok
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| 15:34 | <grantk> I have my clients all defined in my dhcpd.conf for the phones so that makes it easier, you should be able to use the option vendor-class-identifier too, but I never went to the trouble since I was using static ip's anyway
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| 15:34 | <litercola> will the man pages help in configuring certain mac adress to look to another server for a different image?
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| 15:35 | <grantk> yeah they did a bit, I still looked elsewhere
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| 15:35 | <litercola> btw, did you install from alternate, or do a server install and drop ltsp on top?
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| 15:36 | <grantk> server first
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| 15:36 | http://pastebin.com/7T2jhhzd
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| 15:36 | <grantk> There is a simplified example of how I server the other image
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| 15:36 | <litercola> very cool, thank you
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| 15:37 | <grantk> np
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| 15:38 | <litercola> one more, did you install x on your server?
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| 15:38 | I guess im wondering if it will build my client images with a desktop by default, or based on what the server has?
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| 15:39 | <grantk> I think it goes with what is on the server, and yes I did because I used a xenserver image that already had it installed but I have disabled X.
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| 15:40 | <litercola> thank you, you have been very helpful. I figured I should have done a server install to begin with, with the way things have been going, I think that I will regret not starting over with that now.
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| 15:40 | <grantk> np, I am not sure how the alternate goes, just was not an option because I did not want to build the xen kernel as well!
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| 15:41 | <litercola> thanks again, later
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| 16:51 | <alkisg> stgraber: when you have some time, please add ltsp-bindmounts to the ltsp-client-core package: https://bugs.launchpad.net/ubuntu/+source/ltsp/+bug/620133
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