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alkisg_web: Error: "buttons_layout" is not a valid command.
alkisg_web: "button_layout" :: To revert the Ubuntu button position and ordering to their old values, run: sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --type string --set /apps/metacity/general/button_layout menu:minimize,maximize,close
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hi, I am using LTSP for nodes of a small cluster. recently, after a power failure I cannot boot with ubuntu -server kernels, only -generic works. Any idea why?
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No idea, but can we hypothesize that there might have been some type of corruption.. Can you run a MDM5 check on the kernel, or do you have a backup of the hard drive available?
so, vmlinuz-2.6.24-24-server in /var/lib/tftpboot is the same as in /boot
bot initrds are different
are they supposed to be different ie does LTSP add something to the initrd?
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tomee^: compare them to /opt/ltsp/i386/boot/vmlinuz, not with /boot
You cannot boot the server or the clients with that kernel?
the server booted fine
but clients can only boot with 2.6.24-16-generic so far
it's the only one in /opt/ltsp/i386/boot ...
Why would you want to use the server kernel for the clients?
alkisg: because they have 10G ram
The clients?! Wow...
32bit with PAE extensions kernel? Which distro/version is that?
it's a small hpc cluster with diskless nodes
OK - when you upgrade to lucid, the -generic-pae kernel will be automatically selected.
To install the -server kernel now, just chroot and install it
ok, and then copy it to /var/lib/tftpboot ?
root@c1:/# aptitude install linux-image-2.6.24-28-server
The following NEW packages will be installed:
lilo linux-image-2.6.24-28-server mbr
won't it screw up mbr in the master server? ;]
No - not if you don't mount /dev
Just mount /proc, nothing else.
(and maybe it even works without /proc)
I think you can also do --no-install-recommends or something...
I think these are dependencies not recommendations
but you're right, not mounting /dev makes sens
mount: mounting /dev/nbd0 on /rofs failed: No such device
if it didn't work at all I would suspect a broken configuration of the master
but why the heck does it work with the generic kernel?
Remove "quiet splash" from /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default
Reboot the clients, maybe you'll see a different error message then (e.g. the network module missing or something)
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I already removed it
I can see it connecting to the NBD server
rootserver: 192.168.37.20 rootpath:
Negotiation: ..size = 255637KB
and then: mount: mounting /dev/nbd0 on /rofs failed: No such device
Urm... that doesn't sound right
Try putting break=mount in pxelinux.cfg/default, to manually test stuff
(or do you get a busybox?)
I get a busybox
ls -l /dev/nbd0
ls rofs, etc... are those there?
brw-rw---- 1 0 0 43, 0 /dev/nbd0
rofs is there and empty
etc contains usplash.conf, console-setup, udev, modprobe.d and default
mount -o ro -t squashfs /dev/nbd0 /rofs
What does that give you?
ount: mounting /dev/nbd0 on /rofs failed: No such device
OK, the problem is that `mount` line in ltsp_nbd, but I've no idea why it says "no such device".
ogra_cmpc, any ideas?
nbd module is there
though the error should be different then
what should I look for in /proc/filesystems?
might be that the server kernel misses support for squashfs then
check /boot/config-* in your chroot
grep for SQUASH
nothing, but the 2.6.24-16-generic also doesn't have it
while it boots, and squashfs is present in /proc/filesystems
the config should have CONFIG_SQUASHFS=m
and thats a default in the generic kernels
since ubuntu exists
root@c1:/opt/ltsp/i386/boot# grep SQUASH config-2.6.24-16-generic
So if you do "modprobe squashfs" and retry that mount line, it works?
it says that module squashfs is not found
but I found that 2.6.24-19-server has that module
I'll try to boot with it
wow, it worked!
so I guess I have to stick with this kernel or upgrade to lucid and use -generic-pae
anyway, thanks much guys, you were really helpful!
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tomee^: you can declare the module in an initramfs hook...
urm, or put CONFIG_SQUASHFS=m in boot/config...
but since the module is not present in /lib/modules
I suppose it isn't built at all for this kernel
it's funny that Ubuntu drops modules out of a production kernel within one distro release, though
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I have " SCREEN_02 = shell " in /var/lib/tftpboot/ltsp/i386/lts.conf.
But, no login prompt, only flashing cursor at F2.
There is a login prompt at F1, however, users will not authenticate there.
Any suggestions, please.
The clients determine the location of lts.conf based on the dhcp server's boot filename option
What's your dhcpd.conf like?
OK. I will check that.
Also, do you have [Default] on top of lts.conf?
if you have the same arch on the chroot as on the server, you can also try: /opt/ltsp/i386/usr/bin/getltscfg -c /var/lib/tftpboot/ltsp/i386/lts.conf -a
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/usr/drs$ /opt/ltsp/i386/usr/bin/getltscfg -c /var/lib/tftpboot/ltsp/i386/lts.conf -a says: http://pastebin.com/ZugTa6rw
It seems ok, check your dhcpd.conf.
Btw, here's another way to get a shell on the clients: https://help.ubuntu.com/community/UbuntuLTSP/UnlockChrootRootAcct
And yet another way:
alkisg: "localxterm" :: while sitting on a thin client, open a gnome terminal. In that, run: ltsp-localapps xterm. An xterm will open. That xterm runs locally, so any commands you enter there are executed directly on the client.
localxterm - thanks, good to know. BTW, how do I tell which dhcpd.conf is used, /etc/dhcp3/dhcpd.conf or /etc/ltsp/dhcpd.conf. (Still getting to know version 5.)
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You can put it to pastebin if you want a second look
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http://pastebin.com/G2mE6E1z for dhcpd.conf
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rwmarch: that filename should be relative
That's your problem
Btw, where's your tftp dir? In /var/lib/tftpboot or in /srv/tftp?
(lucid final uses /var/lib/tftpboot, but sometimes it breaks on upgrades from 9.10 and uses /srv/tftp...)
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OK. This is fresh install from altn CD.
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Clarify for me, which filename in dhcpd.conf you are referring to that should be relative path?
grep DIRECTORY /etc/default/tftpd-hpa
OK, you may do the following:
1) file a bug report on laundhpad
2) change that file to the "usual" one:
3) restart tftp: sudo restart tftpd-hpa
4) change dhcpd.conf: http://pastebin.com/j9w2GqrA
5) restart dhcpd: sudo invoke-rc.d dhcp3-server restart
You should be ok after that.
Ah, and delete /srv completely, and use /var/lib/tftpboot/ltsp/i386 instead.
(run sudo ltsp-update-kernels to make sure)
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I erred. This system is not a fresh install, but an alternate CD upgrade from 9.10.
And I remember several months ago, with the help of maillist archives, modifying dhcpd.conf because the client was not finding the tftp directory.
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Now I am getting:
/scripts/nfs-bottom/ltsp: eval: line 1: syntax error: redirection unexpected
Did you do all of the above steps?
I.e. you don't have a /srv anymore?
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Yes, I re-checked all of the above steps. Removed the reference to /srv. Restarted dhcp. Restarted tftp. Also took out the option for nfs. Don't think I will need it anymore.
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OK, so what do you have in `ls -l /var/lib/tftpboot/ltsp/i386` now?
ls -l /var/lib/tftpboot/ltsp/i386
Hmm your kernels are old, before the lucid release
Try running sudo ltsp-update-kernels
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And just found the syntax problem - lts.conf was causing it.
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So now the client is booting OK. And I am getting the screens. You fixed it. Thanks very much, alkisg.
I have been using LTSP-4 for many years. Have it figured out well enough to get myself through issues. I find version 5 a tough one to get my head around some of what is going on behind the scenes.
Would still be floundering without you. A little thin on documentation I find. Could be wrong.
I found the learning curve much shallower that 4.2 rwmarch , FWIW
a few weeks of fiddling and I know where all the scripts are now
In time I may come to the same conclusion, BenG.
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Do the 'SOUND' and 'X_BLANKING' work with Fat Clients? for some reason I cant get either to work.
trying to turn sound off?
sound is on by default
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SOUND=off stops pulse from being redirected from the server to the clients - fat clients don't get redirected sound, so I'm not sure what would SOUND=off mean for fat clients.
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alkisg, pretend the sound card is disabled?
that's probably what it should do
How? That would mean no local sound, it's not the same as SOUND=false for thin clients where local sound still works...
or set pulse to a null sink
i think SOUND=No .. means NO SOUND:)
who uses SOUND=No expecting local sound to work?
i bet almost nobody
pulse to a null sink is probably the easiest
Got any idea about the specifics on how to do it?
pulse to a null sink is just a modification of the default.pa
or client.pa.. one of those files
but.. one of the reasons people use SOUND=No is to save memory on a low ram thin client
And won't sound work with alsa?
so that won't help that ccase
(i.e. if someone sinks pulse, can't the user just select alsa?)
alkisg, that's why i think it might be best to go a little lower level, perhaps alsa has a way to disabe sound cards.. and if not.. it could just forceall the mixer volumes to 0
I tried amixer to set the volume to 0, and it worked, but the users are still able to increase the volume
I didn't find any way yet to turn the sound off properly
alkisg, did you talk to alsa developers?
Nope, I didn't go that far
i think alot of problems with ltsp are folks not talking to upstream!
of course.. in the openssh case.. we know they won't do certain things.. like allow the null cipher :(
It's also lack of time - only 24h per day :D
which is sad
because the null cipher would stop us from using LDM_DIRECTX as it is
E.g. getting teacher screen broadcasting was much more important than muting sound :)
Yeah, it also helps a lot on file transfers
also it's great for transfering lots of data
hehe alkisg :)
I think there was a new libssh implementation that allowed the null cipher
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alkisg, do I need to have CONFIGURE_X = True for X_BLANKING to work?
any of the values that require CONFIGURE_X should set it.
essentially, CONFIGURE_X shouldn't be needed from lts.conf anymore
I have X_BLANKING = 1800 (30 min), but the screen blanks in just 5 minutes.
maybe that setting doesnt work with fat clients either
i just handle it by setting teh gconf keys
to enable the screen saver
and have those settings enable blanking
I'll try that
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LedHed: fat clients can be better configured using the usual DE ways, e.g. the following file disables screen locking by default:
|13:02||* alkisg wants to make a big collection of useful (in LTSP) gconf keys...|
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alkisg: "button_layout" :: To revert the Ubuntu button position and ordering to their old values, run: sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --type string --set /apps/metacity/general/button_layout menu:minimize,maximize,close
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
|13:29||* vagrantc thanks ltspbot for being a great repository of knowledge|
!learn disable_lock_screen as To disable screen locking for new users in gnome: sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults --type boolean --set /desktop/gnome/lockdown/disable_lock_screen 1. To enable it for a specific user, from that user account run: gconftool-2 --type boolean --set /desktop/gnome/lockdown/disable_lock_screen 0.
alkisg: The operation succeeded.
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!learn volumes_visible as To prevent volumes (cd, floppy etc) from showing on the user's desktops, run: sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults --type boolean --set /apps/nautilus/desktop/volumes_visible 0
alkisg: The operation succeeded.
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alkisg, would be nice to have that only for the thin client users.. and not global
I'm using "defaults" so that the teacher can enable it for himself, but yeah, stacking gconf keys per group would be really cool
sabayon already does it, but it'd be better if it was embedded
I think gsettings will support that.
yes.. i'm eagerly awaiting gsettings
tired of gconf
dconf + gsettings will be better
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|15:05||* vagrantc scribbles on the future notepad|
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New to LTSP; need recommendations for inexpensive thin clients for offices running web browser, openoffice, gnucash and scribus
i spend $200 a piece for dual core atoms with 2GB ram
they didn't have any cdroms tho
check out disklessworkstations
oops -- slick
they sponsor ltsp
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sharles, usually the channel starts to die down in activity at this point
might be best to post to ltsp-discuss list
johnny: Error: "discuss" is not a valid command.
johnny: "ltsp-discuss" :: at https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
that way you'll get a wider audience
perhaps you should read the archives first tho
see if somebody answered your question already
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anyone here use sabayon much?
i'm interested, too.
I've used it, I can help you with basic stuff maybe, but I'm having a problem atm
read someplace it's a resource hog
alkisg: sbalneav was last seen in #ltsp 1 week, 5 days, 4 hours, 19 minutes, and 7 seconds ago: <sbalneav> win 1
looks like he expert's on vacation :)
how can it be a resource hog?
it doesn't do that much after login
it only uses resources when it's running it's little bubble when you are configuring stuff
boojum: sabayon the desktop locking program, not the distro...
and it's not bad afaik
it should probably be renamed to gnome lockdown or somethin
alkisg: yup -- think the post conflated the two
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