IRC chat logs for #ltsp on irc.libera.chat (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
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| 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
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| 12:17 | work_alkisg: ^
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| 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?
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| 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/
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| 12:28 | 1.10/view/head:/src/greeter.c
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| 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
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| 14:27 | <ltsp`> ldm-source: at http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ldm-trunk/files
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| 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
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| 14:31 | <work_alkisg> ricotz: known problem, that part will need fixing
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| 14:31 | Do file a bug though
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| 14:31 | !ltsp-bug
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| 14:31 | <ltsp`> ltsp-bug: To file a bug report for upstream LTSP, go to https://bugs.launchpad.net/ltsp
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| 14:32 | <ricotz> work_alkisg, ok, I see
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| 14:32 | <work_alkisg> The overlayfs module was renamed to overlay
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| 14:32 | So it's a matter of trying both names, overlayfs and overlay
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| 14:33 | <ricotz> ah ok, so just the related commit needs to be backported
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| 14:33 | <work_alkisg> Well, there was indeed a fix in debian but I'm not quite sure it fixes the ubuntu issue
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| 14:33 | <ricotz> afaics trunk does that check
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| 14:34 | <work_alkisg> http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/revision/2639
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| 14:34 | <ricotz> yeah. that one
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| 14:35 | <work_alkisg> I remember an issue with that... ah
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| 14:35 | I think it was like this:
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| 14:35 | upstream and debian call it "overlay"
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| 14:35 | ubuntu continues to call it "overlayfs"
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| 14:35 | <work_alkisg> But now it needs the workdir
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| 14:36 | So the r2639 fix by vagrantc might _not_ fix the ubuntu issue
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| 14:36 | ricotz, if you could test it...
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| 14:37 | <ricotz> work_alkisg, sorry, I am not near the affected system, will be next friday
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| 14:38 | <alkisg> np
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| 14:38 | the bug will still be there :D
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| 14:38 | <ricotz> yeah, I can't investigate it until then though ;)
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| 14:39 | * alkisg checks in a willy vm... | |
| 14:39 | <ricotz> yeah, it is probably broken on vivid and wily too
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| 14:40 | alkisg, thanks for the info
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| 14:40 | <alkisg> You're welcome
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| 14:46 | <vagrantc> overlay vs. overlayfs?
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| 14:46 | <alkisg> yup... but I see in wily that they have it as both overlay _and_ overlayfs, so it'll probably work
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| 14:47 | <vagrantc> depends on if there's backwards compatible syntax
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| 14:47 | <alkisg> If we try "overlay" first, we don't need the backwards compatible syntax, you're using the new syntax there
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| 14:47 | You did it fine :)
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| 14:48 | <vagrantc> ah, right, ubuntu defaults to NBD, so that should work
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| 14:48 | <alkisg> I need to do the same in cleanup.d
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| 14:48 | (for ltsp-pnp)
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| 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?
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| 17:54 | <vagrantc> distro?
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| 17:58 | <awei> alkisg: ubuntu 14.04 sorry
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| 17:59 | vagrantc: ubuntu 14.04, sorry
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| 18:19 | <alkisg> awei: are you still trying with read-only nfs?
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| 18:19 | <awei> i rebuild the client image
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| 18:19 | and am using read-only nfs
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| 18:20 | <alkisg> Which kernel are you using in the chroot?
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| 18:20 | ls /opt/ltsp/i386/boot/vm*
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| 18:20 | <awei> vmlinuz-3.13.0-53-generic
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| 18:20 | <alkisg> Hm, that shouldn't have an issue...
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| 18:21 | Do you get a shell?
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| 18:21 | So that you see if you have a cow file system or not...
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| 18:21 | <awei> i get the prompt for username
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| 18:21 | <alkisg> Try this: ltsp.break=50-fstab
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| 18:21 | <awei> when i enter and hit return. it just returns blank screen
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| 18:21 | <alkisg> Put this in pxelinux.cfg/default
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| 18:21 | !quiet-splash
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| 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
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| 18:21 | <awei> ok
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| 18:22 | i removed quiet splash
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| 18:22 | <alkisg> Replace quiet splash with ltsp.break=50-fstab
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| 18:22 | <awei> i see the client locating USB devices, etc
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| 18:22 | <alkisg> There, check if the root file system is writeable
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| 18:22 | <awei> it's not writeable
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| 18:22 | <alkisg> I.e. try `touch /hello`
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| 18:22 | <awei> ok
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| 18:22 | i'll try that
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| 18:22 | <alkisg> Watch out for any error messages
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| 18:23 | E.g. "overlayfs: nfs is not a supported file system for lowerdir"
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| 18:23 | <awei> i'm getting that error
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| 18:23 | <alkisg> OK, then it affects 3.13 too, at least in ubuntu
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| 18:23 | The problem is that overlayfs is not implemented well and it doesn't work over nfs
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| 18:23 | <awei> how do i use different kernel?
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| 18:24 | <alkisg> So, switch to nbd....
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| 18:24 | <awei> but, i had it working at one point using NFS
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| 18:24 | was that because i had it read/write?
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| 18:24 | <alkisg> No, because of older kernel probably
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| 18:24 | <awei> ok
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| 18:24 | <alkisg> At some point ubuntu must have dropped its own patched overlayfs in favor of the upstream one
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| 18:24 | <awei> i c.
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| 18:25 | <alkisg> I don't know exactly... it will work with aufs though
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| 18:25 | <awei> ok, will try
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| 18:26 | thanks
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| 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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