IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 29 May 2015   (all times are UTC)

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04:44
<alkisg>
gp_alt_: you need to edit ldm/gtkgree/greeter.c, search for "LDM_FORCE_LANGUAGE", read the code there, and then do the same for a new LDM_DISABLE_SHUTDOWN directive at line 570
04:45
But keep in mind that there are many keyboard shortcuts for rebooting in linux that you'd also need to disable...
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12:15
<gp_alt_>
alkisg: Thanks for the tip about shutdown. I handled the ctrl-alt-del one and removed the click options from the desktop. I am mainly trying to prevent users with good intentions from causing problems unintentionally. So if I don't catch every case at the moment that is fine. I just want to get rid of the easy options
12:17
work_alkisg: ^
12:18
I guess I could take a more diligent route. Does anyone assign static ips at the dhcp level for their thin/fat clients and use WOL to keep them booted?
12:18
That might be more trouble than it is worth at first though
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12:28
<gp_alt_>
alkisg: When you get a moment can you link me to the file you are talking about? I checked greeter.c in trunk and version 1.10 which is the one used by trusty but didn't see the variables you were talking about. I am more of a python/javascript guy though and am not familiar with c code layout.. http://bazaar.launchpad.net/~lightdm-team/lightdm/trunk/view/head:/src/greeter.c and http://bazaar.launchpad.net/~lightdm-team/lightdm/
12:28
1.10/view/head:/src/greeter.c
12:29
last link got broke up: http://bazaar.launchpad.net/~lightdm-team/lightdm/1.10/view/head:/src/greeter.c
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14:27
<work_alkisg>
!ldm-source
14:27
<ltsp`>
ldm-source: at http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ldm-trunk/files
14:27
<work_alkisg>
gp, gp_alt_, see the *LDM* sources above ^, not the lightdm sources
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14:30
<ricotz>
hello, is someone already using the lts-vivid (3.19) kernel on trusty in a client chroot? last time I tried it failed due missing overlayfs module - lts-utopic (3.16) works fine
14:31
<work_alkisg>
ricotz: known problem, that part will need fixing
14:31
Do file a bug though
14:31
!ltsp-bug
14:31
<ltsp`>
ltsp-bug: To file a bug report for upstream LTSP, go to https://bugs.launchpad.net/ltsp
14:32
<ricotz>
work_alkisg, ok, I see
14:32
<work_alkisg>
The overlayfs module was renamed to overlay
14:32
So it's a matter of trying both names, overlayfs and overlay
14:33
<ricotz>
ah ok, so just the related commit needs to be backported
14:33
<work_alkisg>
Well, there was indeed a fix in debian but I'm not quite sure it fixes the ubuntu issue
14:33
<ricotz>
afaics trunk does that check
14:34
<work_alkisg>
http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/revision/2639
14:34
<ricotz>
yeah. that one
14:35
<work_alkisg>
I remember an issue with that... ah
14:35
I think it was like this:
14:35
upstream and debian call it "overlay"
14:35
ubuntu continues to call it "overlayfs"
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14:35
<work_alkisg>
But now it needs the workdir
14:36
So the r2639 fix by vagrantc might _not_ fix the ubuntu issue
14:36
ricotz, if you could test it...
14:36work_alkisg is now known as alkisg
14:37
<ricotz>
work_alkisg, sorry, I am not near the affected system, will be next friday
14:38
<alkisg>
np
14:38
the bug will still be there :D
14:38
<ricotz>
yeah, I can't investigate it until then though ;)
14:39* alkisg checks in a willy vm...
14:39
<ricotz>
yeah, it is probably broken on vivid and wily too
14:40
alkisg, thanks for the info
14:40
<alkisg>
You're welcome
14:46
<vagrantc>
overlay vs. overlayfs?
14:46
<alkisg>
yup... but I see in wily that they have it as both overlay _and_ overlayfs, so it'll probably work
14:47
<vagrantc>
depends on if there's backwards compatible syntax
14:47
<alkisg>
If we try "overlay" first, we don't need the backwards compatible syntax, you're using the new syntax there
14:47
You did it fine :)
14:48
<vagrantc>
ah, right, ubuntu defaults to NBD, so that should work
14:48
<alkisg>
I need to do the same in cleanup.d
14:48
(for ltsp-pnp)
14:48
<vagrantc>
ah, right
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17:50
<awei>
using ltsp-server 5.5.1 and same version for client. when booting client, i'm getting a bunch of permission denied errors. any ideas?
17:54
<vagrantc>
distro?
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17:58
<awei>
alkisg: ubuntu 14.04 sorry
17:59
vagrantc: ubuntu 14.04, sorry
18:19
<alkisg>
awei: are you still trying with read-only nfs?
18:19
<awei>
i rebuild the client image
18:19
and am using read-only nfs
18:20
<alkisg>
Which kernel are you using in the chroot?
18:20
ls /opt/ltsp/i386/boot/vm*
18:20
<awei>
vmlinuz-3.13.0-53-generic
18:20
<alkisg>
Hm, that shouldn't have an issue...
18:21
Do you get a shell?
18:21
So that you see if you have a cow file system or not...
18:21
<awei>
i get the prompt for username
18:21
<alkisg>
Try this: ltsp.break=50-fstab
18:21
<awei>
when i enter and hit return. it just returns blank screen
18:21
<alkisg>
Put this in pxelinux.cfg/default
18:21
!quiet-splash
18:21
<ltsp`>
quiet-splash: to disable the splash screen in Ubuntu, in order to see any boot error messages, run sudo gedit /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default and remove quiet splash plymouth:force-splash vt.handoff=7
18:21
<awei>
ok
18:22
i removed quiet splash
18:22
<alkisg>
Replace quiet splash with ltsp.break=50-fstab
18:22
<awei>
i see the client locating USB devices, etc
18:22
<alkisg>
There, check if the root file system is writeable
18:22
<awei>
it's not writeable
18:22
<alkisg>
I.e. try `touch /hello`
18:22
<awei>
ok
18:22
i'll try that
18:22
<alkisg>
Watch out for any error messages
18:23
E.g. "overlayfs: nfs is not a supported file system for lowerdir"
18:23
<awei>
i'm getting that error
18:23
<alkisg>
OK, then it affects 3.13 too, at least in ubuntu
18:23
The problem is that overlayfs is not implemented well and it doesn't work over nfs
18:23
<awei>
how do i use different kernel?
18:24
<alkisg>
So, switch to nbd....
18:24
<awei>
but, i had it working at one point using NFS
18:24
was that because i had it read/write?
18:24
<alkisg>
No, because of older kernel probably
18:24
<awei>
ok
18:24
<alkisg>
At some point ubuntu must have dropped its own patched overlayfs in favor of the upstream one
18:24
<awei>
i c.
18:25
<alkisg>
I don't know exactly... it will work with aufs though
18:25
<awei>
ok, will try
18:26
thanks
18:27
<alkisg>
You're welcome
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22:26
<vagrantc>
overlay(fs) was only mainlined in 3.18 ... so any older kernels have non-mainlined patches
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