IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 25 September 2014 (all times are UTC)
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| 14:56 | <gdi2k> was just looking at my server load and noticed that openssh/sftp-server shows up for each user and takes quite a few CPU cycles. I thought everything went via NBD, or is that only for / and /home goes via SSH? this is on Xubuntu 14.04
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| 16:35 | <sbalneav> vagrantc: ping, I am being driven literally bugnuts trying to stop wheezy from modeswitching the screen.
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| 16:35 | On boot.
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| 16:35 | It looks like it messes up my rez on these monitors/thin clients combos.
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| 16:36 | as a result, I end up with an X display thats 1280x768
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| 16:36 | <sbalneav> I've added "nomodeset" to the kernel boot
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| 16:36 | disabled /etc/init.d/console-setup
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| 16:36 | keeps doing it.
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| 16:36 | Any suggestions?
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| 16:36 | <vagrantc> i haven't really found nomodeset to actually be useful
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| 16:37 | it either gets ignored, or causes even more problems...
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| 16:37 | <sbalneav> I just want it to boot in the standard vga.
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| 16:37 | * vagrantc tries to come up with better suggestions | |
| 16:37 | <sbalneav> Seems like this should be simple.
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| 16:37 | <vagrantc> you can't change it with xrandr?
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| 16:38 | <sbalneav> No
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| 16:39 | xrandr -q reports only mode available is 1280x768
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| 16:39 | <vagrantc> i honestly don't have a solid grasp of modesetting
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| 16:39 | <sbalneav> When it does the text mode change on boot, the bottom bit on the screen gets filled with "random vga fuzz"
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| 16:39 | and stays there
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| 16:39 | <vagrantc> what driver?
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| 16:39 | <sbalneav> Dunno.
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| 16:40 | It's an intel board.
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| 16:40 | <vagrantc> there were some essentially unsolveable problems with some older intel video cards ... essentially hardware bugs
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| 16:40 | !intel
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| 16:40 | <ltsp`> I do not know about 'intel', but I do know about these similar topics: 'ipxe', 'italc'
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| 16:40 | <sbalneav> This is a pretty new board.
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| 16:40 | like 2 years old
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| 16:40 | <vagrantc> ah
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| 16:41 | <sbalneav> I'll keep plugging away at it.
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| 16:41 | If I smash my forehead hard enough, I'm sure I can figure it out :D
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| 16:41 | <vagrantc> sbalneav: is this in an ltsp environment? could you try it outside of LTSP ?
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| 16:41 | <sbalneav> ok, I'll try.
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| 16:42 | I'll have to do it tomorrow and report back, have to pop out soon and take my mom to the doctor.
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| 16:42 | <vagrantc> if it works fine there, i might have to reconsider killing off all the screen hacks: https://bugs.debian.org/587900
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| 16:43 | sbalneav: X_VIRTUAL=false has worked in a few cases
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| 16:43 | er, X_VIRTUAL_AUTO=false
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| 16:44 | <JuJuBee_> Greetings all.
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| 16:44 | I am still having issues with .dmrc file not being used to select users "preferred" session on login.
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| 16:45 | <vagrantc> we should really consider using the xorg.conf.d infrastructure ... i *think* that's in upstream X.org
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| 16:46 | JuJuBee_: i recently fixed that in revision control, but haven't uploaded anywhere...
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| 16:47 | <JuJuBee_> OK. so once you upload it and I dist-upgrade it should work again?
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| 16:47 | <vagrantc> JuJuBee_: https://bugs.launchpad.net/ltsp/+bug/1272889
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| 16:47 | maybe
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| 16:47 | <JuJuBee_> lol
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| 16:47 | <vagrantc> or you can try manually applying the patches
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| 16:50 | <JuJuBee_> add the green remove the red as defined https://bazaar.launchpad.net/~ltsp-upstream/ltsp/ldm-trunk/revision/1572
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| 17:00 | vagrantc: if I used "sudo ltsp-chroot update-alternatives --config x-session-manager" to select a session and the users manually create a .dmrc file with the .dmrc file be used?
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| 17:01 | <vagrantc> JuJuBee_: the problem is that it validates the valid sessions by the presence of the session on the server, regardless of fat or thin client
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| 17:02 | <JuJuBee_> so as long as any session available to the user is installed on server I should be ok?
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| 17:02 | <vagrantc> JuJuBee_: so unless the server also has the same session types available, it will do nothing.
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| 17:02 | yes.
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| 17:02 | <JuJuBee_> OK. Thanks
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| 17:02 | <vagrantc> at least in theory.
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| 17:02 | <JuJuBee_> I will test it
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| 17:02 | <vagrantc> you could even probably "fake" it by installing the .desktop files without the actual packages...
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| 17:03 | <JuJuBee_> I use a gui on my server since I am only serving a small classroom with 12 seats.
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| 17:03 | makes life a bit easier
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| 17:12 | <vagrantc> JuJuBee_: you should be able to download a diff of that commit
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| 17:13 | JuJuBee_: https://bazaar.launchpad.net/~ltsp-upstream/ltsp/ldm-trunk/diff/1572
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| 17:13 | although mabe the version you're running will have incompatbile changes...
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| 17:20 | <JuJuBee_> vagrantc: so I applied the changes updated image had a student log out so he got the updated image and still not using what is in the dmrc file even though his selection *is* installed on the server
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| 17:27 | FWIW I use 14.04.1 64Bit on server and image
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| 17:31 | <vagrantc> shouldn't matter.
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| 17:31 | it worked for me...
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| 17:31 | you've got NFS homedirs or something?
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| 17:31 | JuJuBee_: try deleting the ~/.dmrc
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| 17:32 | JuJuBee_: and then selecting a session on login ... does it create a ~/.dmrc on the server? does it respect it on subsequent logins? does it change it appropriately?
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| 17:33 | <JuJuBee_> vagrantc: yes using nfs to mount home dirs.
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| 17:33 | <vagrantc> it should still write to the server's ~/.dmrc regardless, and still work. hrm.
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| 17:38 | <JuJuBee_> vagrantc: so it is NOT creating the dmrc file
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| 17:39 | <vagrantc> you using NFS or NBD?
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| 17:40 | <JuJuBee_> I thought nbd since I created fat client
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| 17:40 | <vagrantc> if NBD, did you regenerate the image after applying the patch?
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| 17:40 | <JuJuBee_> I did regenerate image
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| 17:40 | <vagrantc> fat/thin is unrelated to NFS/NBD
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| 17:42 | <JuJuBee_> Oh, how do I check nbd?
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| 17:42 | <vagrantc> if you ran ltsp-update-image you're using NBD.
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| 17:43 | this is Ubuntu?
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| 17:43 | <JuJuBee_> Ues
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| 17:43 | Yes
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| 17:43 | <vagrantc> ubuntu uses NBD by default. you'd have to jump through a lot of hoops to switch.
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| 17:44 | JuJuBee_: does it work with the patch applied and using sshfs?
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| 17:44 | i.e. drop your NFS homedir stuff
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| 17:44 | <JuJuBee_> all I do is comment the fstab_0 statement to test?
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| 17:45 | <vagrantc> and reboot
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| 17:45 | <JuJuBee_> reboot server?
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| 17:46 | <vagrantc> no, client
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| 17:53 | <JuJuBee_> vagrantc: so I commented the fstab and rebooted. logged in and out changed session logged in and out and logged back in again. It maintained the last selected session, but there is still NO .dmrc file
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| 17:54 | hmmm something is strange. when I logged in the files I had were from the file server not the ltsp server. On the ltsp server I see .dmrc
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| 17:56 | Ah there is lts.conf in /var/lib/tftboot/ltsp/amd64 AND /opt/ltsp/amd64/etc/
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| 17:56 | Which one is used?
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| 18:01 | <JuJuBee_> I disabled fstab_0 from both and rebooted. Session selection is working now.
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| 18:04 | <vagrantc> file server?
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| 18:06 | <vagrantc> JuJuBee_: what does the file server serve? what's the LTSP server if it's not serving files?
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| 18:06 | all an LTSP server is with fat clients is a file server...
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| 18:07 | <JuJuBee_> vagrantc: I use a file server as my gateway so my students can access files remotely from home... web pages etc. Don't want the ltsp server exposed.
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| 18:07 | <vagrantc> the file server is the homedir server?
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| 18:07 | <JuJuBee_> So I mounted /home using nfs on the /home on ltsp server and session switching works as expected
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| 18:07 | Yes, homedir
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| 18:07 | <vagrantc> what serve's up the NBD root?
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| 18:08 | <JuJuBee_> ltsp
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| 18:08 | <vagrantc> yes, you need to have the homedirs be the same in all places.
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| 18:09 | <JuJuBee_> last year (using ubuntu 12) I used FSTAB_0 staement in lts.conf to mount /home and everything was working fine
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| 18:09 | This year (upgraded to 14) not working
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| 18:10 | <vagrantc> JuJuBee_: if you revert the patch to X50-dmrc-processing does it stop working?
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| 18:10 | <JuJuBee_> dunno, let me check. Regen image right
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| 18:10 | <vagrantc> yeah
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| 18:11 | JuJuBee_: the lts.conf should have some comments that tell you which to use
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| 18:13 | <JuJuBee_> Looks like the one in /opt requires update-image according to comments. Does the one inn /var/lib... require update-image as well?
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| 18:13 | NM, I made change to the chroot so of course update-image
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| 18:17 | Recreating image now...
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| 18:17 | <vagrantc> the one from tftp does not require updating the image, and will overwrite the one in /opt
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| 18:18 | though it may be looking for one in /var/lib/tftpboot/ltsp/i386, if it's misconfigured
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| 18:26 | <JuJuBee_> OK, restored X50-dmrc-processing and session selection works as expected
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| 18:27 | Seems like using FSTAB_0 is not working. Maybe something to do with homedir not mounting fast enough?
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| 18:30 | vagrantc: I have to go to my other job now. Is there any difference between using lts.conf to mount /home vs using fstab? I will check for response tomorrow. Thanks for the assistance.
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| 18:47 | <vagrantc> JuJuBee_: ltsp will overwrite fstab, so use lts.conf
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