IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 18 September 2011 (all times are UTC)
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| 07:39 | <electrodib> hi all! experiencing an unusable screen after booting a dell fx130 thin-client on a ubuntu 10.04 ltsp. Any hint ?
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| 07:46 | alkisg has joined IRC (alkisg!~alkisg@ubuntu/member/alkisg) | |
| 07:47 | <alkisg> What does "unusable screen" mean, specifically?
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| 08:02 | <electrodib> either screen 7 or screen 1 show random pixels
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| 08:03 | <alkisg> !nomodeset
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| 08:03 | <ltsp> alkisg: nomodeset: Unfortunately, Kernel Mode Setting (KMS) doesn't work well with some cards. To disable it, open /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default and replace "quiet splash" with "nomodeset".
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| 08:03 | <alkisg> Try that, see if it helps
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| 08:08 | <electrodib> during the boot, i can see loading vmlinuz, initrd.img... ready, then the verbose boot start, and then the screen go random art pixels...
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| 08:09 | i've already removed quiet splash, and now just added nomodeset without luck
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| 08:11 | <alkisg> If you put SCREEN_02=shell in lts.conf, so that X doesn't try to start at all, do you still see random pixels?
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| 08:19 | <electrodib> yes. in fact, it seems that the boot process get stuck even before reading lts.conf (whatever the number of SCREEN_XX i put in lts.conf, always have screen 1 and 7)
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| 08:19 | <alkisg> Are you sure that you're modifying the correct pxelinux.cfg/default, and the correct lts.conf?
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| 08:19 | Maybe you're using the wrong path...
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| 08:20 | Anyway try this: in pxelinux.cfg/default, put: init=/bin/bash
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| 08:20 | This is the earliest you can have a prompt, after the initramfs
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| 08:22 | Parker955 is now known as Parker955_Away | |
| 08:36 | <alkisg> To verify if you're using the correct pxelinux.cfg/default or not, change "vmlinuz" to "notexists" and verify that it doesn't even load the kernel
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| 08:45 | <electrodib> i am using the correct pxelinux.cfg/default, tested with another machine, works (even splash screen ok) then hangs with error :
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| 08:46 | failed to connect to NBD server... ok, ok, how do I configure this nbd server ?
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| 08:48 | <alkisg> So now you're past the random pixels problem?
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| 08:49 | Or are you just using another client until you properly configure your server?
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| 08:51 | <electrodib> yes, using another client... need to configure this nbd-server thing, don't know how :-(
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| 08:51 | <alkisg> Which distro/version are you using?
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| 08:51 | <electrodib> ubuntu 10.04
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| 08:51 | <alkisg> Paste the output of those commands:
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| 08:51 | grep nbd /etc/inetd.conf
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| 08:52 | grep initrd /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default
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| 08:52 | ls -l /opt/ltsp/images
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| 08:53 | netstat -nap | grep :2000
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| 08:57 | <electrodib> hum, no inetd.conf, and no nbd in xinetd.conf - initrd in pxelinux: append ro initrd=initrd.img quiet splash nbdport=2001
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| 08:57 | and nothing listen on port 2000 nor 2001
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| 08:57 | <alkisg> Hmmm maybe people using xinetd recently...
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| 08:57 | <electrodib> and no config in /etc/ndb-server/
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| 08:58 | <alkisg> Did you deliberately choose xinetd over openbsd-inetd, or it happened by mistake?
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| 08:58 | (Ubuntu/LTSP uses openbsd-inetd by default)
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| 09:01 | <electrodib> this server config is in fact an openvz container from proxmox with a "standard ubuntu 10.04" preinstalled. then i've just added ltsp-server-standalone
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| 09:01 | <alkisg> Maybe those people preinstalled xinetd for some reason
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| 09:02 | Better install openbsd-inetd instead, so that you have a usual ltsp installation, it'll make things easier for troubleshooting
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| 09:02 | sudo apt-get install openbsd-inetd
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| 09:02 | and to autoconfigure nbd:
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| 09:02 | sudo ltsp-update-image --force
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| 09:26 | <electrodib> hey, cool, it works !! at least for a standard pc. now i need to make it works with this damned Dell-fx130. Anyway, thanks so far for your help, alkisg !!
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| 09:27 | <alkisg> electrodib: ok, so for dell-fx130, are you sure that if you put "init=/bin/bash", you still get the problem?
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| 09:27 | That would mean that the problem happens too early, in the initramfs
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| 09:28 | <electrodib> yes, it seems to happens when switching to framebuffer...
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| 09:29 | <alkisg> It shouldn't switch to framebuffer with "quiet splash" removed and "nomodeset" in it
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| 09:29 | That's why I believe that you either didn't do it correctly, or that you're using the wrong path
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| 09:30 | Without "quiet splash" and with "nomodeset", the only change that happens is with console-setup, which loads the character fonts into vga tables
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| 09:30 | If *that's* the problem, then you can tell console-setup to not change the default vga tables
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| 09:30 | <electrodib> hum... so the pxelinux.cfg/default line to edit would look like: append ro initrd=initrd.img nomodeset init=/bin/bash, right ?
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| 09:30 | <alkisg> Yes
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| 09:32 | <electrodib> i'm pretty sure of the right path for this file, as i'm in fact using pxelinux.cfg/01-00-e0-c5-45-86-c9 and see the fx130 loading this file
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| 09:33 | <alkisg> Good. So, let's see if the problem is the vga tables
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| 09:33 | Replace "init=/bin/bash" with "break=top"
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| 09:33 | Reboot the client. Do you get an initramfs prompt?
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| 09:35 | <electrodib> yes, sir
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| 09:36 | <alkisg> Now we want to test replacing the "setfont" executable with a harmless one
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| 09:36 | While still in the initramfs (==temporary change)
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| 09:36 | Unfortunately we don't have /bin/true to symlink to it
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| 09:37 | So, do this: echo '#!/bin/sh' > /bin/setfont
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| 09:37 | chmod +x /bin/setfont
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| 09:37 | <electrodib> hum, i've a prompt, but can't write anything at it !!
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| 09:37 | <alkisg> And then press ctrl+d to exit the prompt
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| 09:37 | Ah, you have a usb keyboard?
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| 09:37 | Can you get a ps/2 one?
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| 09:38 | <electrodib> yes, usb... i have some ps2 somewhere, back in a few minutes...
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| 09:42 | <alkisg> Remember that you need to power off the client to plug in the ps/2 keyboard
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| 09:46 | <electrodib> all done, without success !!
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| 09:53 | <alkisg> So it still had the problem at the same point? Or later on, after the initramfs, when setfont was called again from the nbd image?
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| 09:55 | <alkisg> Btw, it might be a good idea to try to boot that with a live usb stick
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| 09:56 | But in any case, if you put "break=top" and disable setfont, and at the same time have "init=/bin/bash" so that it gives you a shell as early as possible, then your VGA shouldn't be touched by linux at all.
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| 09:56 | So it would be very very strange if you had problems with those conditions.
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| 10:01 | <electrodib> Yes, after disabling setfont, screen become random before having a shell. Haven't have any success with my ubuntu 10.04 usb, but the fx-130 start natively with a ubuntu 9.04 heavily modified by devon it
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| 10:02 | so at least i know it can start a X server
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| 10:04 | <alkisg> Which graphics card does it use?
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| 10:04 | *have?
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| 10:12 | <electrodib> so it's a VIA for almost everything : VIA Eden proc, VIA usb, VIA pic, etc... except for the ethernet (Realtek RTL-8110)
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| 10:14 | <alkisg> Maybe some broken graphics module then, which breaks your VGA even before X
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| 10:14 | Well, you can use a 9.04 chroot in your 10.04 server, if you don't find another solution
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| 10:15 | ltsp-build-client --dist=jaunty or something like that
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| 10:35 | <Hyperbyte> mhm
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| 13:43 | <electrodib> hello alkisg ! finally i've installed the latest ubuntu 11.04 and at least it boot ! Thanks again for your patience :)
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| 13:43 | <alkisg> You're welcome
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| 13:43 | You could also install a different kernel
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| 13:44 | With apt-get install linux-lts-backport-image-natty
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| 13:48 | <electrodib> why not. I always prefer LTS version when it's not for me... Anyway, i've a brand new task : connect this ltsp server with samba4 (AD) users...
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| 18:45 | <markit> so quiet today...
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| 18:47 | <alkisg> It usually is, on Sundays...
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| 18:48 | <markit> well, I have more time on sundays to chat, other days usually I worl
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| 18:48 | work
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| 18:49 | except today, that I have to work for a rails project I'm in troubles with
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| 18:49 | btw, I've subscribed diaspora, do you want an invite too?
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| 18:50 | <alkisg> Another social networking site? :O
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| 18:50 | Anything special there?
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| 18:50 | <markit> yep, should be build to respect users
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| 18:50 | very rare feature
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| 18:50 | is also distribuited by design
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| 18:51 | well, better googling at it if you want, is in alpha stage
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| 18:51 | of course will never kill FB or google+
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| 18:51 | is build on rails and AGPL3 code, you can grab the source
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| 18:52 | http://en.wikipedia.org/wiki/Diaspora_%28software%29
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| 18:52 | <alkisg> So normally a user installs it in a web serverr?
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| 18:52 | (yeah reading that as we speak...)
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| 18:53 | <markit> only if you WANT to run the server, otherwise you don't have to (I don't)
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| 18:53 | <alkisg> I'm wondering if it could be used to organize teachers + students in schools
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| 18:59 | <markit> hehehe :)
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| 18:59 | never tried moodle? (me not, but seems the right product)
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| 19:00 | <alkisg> I did... I don't know it seems to me like it misses something to make it attractive
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| 19:00 | Maybe it needs more ajax
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| 19:04 | <markit> well, if you want to have a look (it's in Alpha stage) I can send you an email-invite
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| 19:05 | <alkisg> Nah I'll wait till it gets more publicity etc
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| 19:05 | <markit> ok, no problem :)
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| 19:06 | back to work now, see you :)
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| 19:06 | <alkisg> Those things are time killers :D facebook, wave, google plus...
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| 19:06 | bb
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| 19:06 | <markit> hehehe, really, irc also
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| 19:06 | <alkisg> Indeed
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| 22:35 | <highvoltage> heh, busted
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