Commit bisect lubuntu-desktop?

Israel israeldahl at
Thu Feb 13 02:28:58 UTC 2014

On 02/12/2014 06:47 PM, John Hupp wrote:
> I have been troubleshooting a problem that appeared between Lubuntu 
> Raring and Saucy. The problem does not appear on plain Ubuntu. I 
> installed lubuntu-desktop on Ubuntu Saucy and duplicated the problem, 
> so it seems that something in the desktop environment is responsible. 
> If I were speculating, I would say that lxsession or one of its 
> dependencies is the culprit.
> In any case, after coming at it from a number of angles and not 
> finding a solution, I'm wondering about something nice and methodical 
> like a commit bisect. Can I do that with lubuntu-desktop or its major 
> dependent packages?
> --John
> ---------------------------------
> P.S. I've posted more directly about the problem here, but because it 
> involves LTSP and that is a rarity on Lubuntu, no one with specific 
> experience addressed the problem (though Israel took a swing at it 
> based on his general knowledge). Nonetheless, my notes about what I've 
> tried:
> Under Saucy i386, I find that on a client machine the X session ends 
> within seconds and returns to the LDM login screen.
> LDM.log merely notes something like "x session started" and then 
> immediately follows with "x session ended."
> It doesn't matter which user account I log in with.
> I have tried a couple different clients with different video cards, 
> one an old Intel and the other a current Radeon, both with plenty of RAM.
> The problem only appears with Lubuntu Saucy. I have not seen it with 
> Ubuntu Saucy.
> The problem did not appear under Lubuntu Raring.
> On an installation of Ubuntu Saucy, installing lubuntu-desktop and 
> choosing the Lubuntu session from the LTSP client manifests the bug. 
> This heavily implicates LXDE.
> ~/.config/lxsession/Lubuntu/desktop.conf for both users has 
> disable_autostart=all, so many/most autostart apps are disabled.
> Disable zram: On the server, sudo mv /etc/init/zram-config.conf –> 
> zram-config.donotstart and then sudo ltsp-update-image -c /. Did not fix.
> Trying different monitors on the client did not fix.
> Check /var/lib/tftpboot/ltsp/i386/lts.conf: LDM_DIRECTX = True (for no 
> encrypted SSH tunnel)
> cat /var/log/Xorg.n.log on client: I don’t see anything. Last line is 
> Suspending AIGLX clients for VT switch.
> LTS.conf: LDM_AUTOLOGIN=True (with accompanying user and P/W in 
> specific client section) produces a boot loop.
> From LDM, logging in with Session: Failsafe Lxterm produced a 
> successful login into a terminal window.
> But from that terminal, running startx yields X: user not authorized 
> to run the X server, aborting. (Yet it does the same on 13.04, so that 
> does not indicate anything.)
> On the server, ~/.Xauthority is owned by the respective users, not by 
> root (ownership by root had caused this behavior for one user).
> None of the users are in the video group, but neither are they in 13.04.
> From LDM on client, Ctrl-Alt-F2 and startx at that root prompt does 
> start the Ubuntu X session (though with no desktop features).
Here is another shot in the dark....
1. Default applications for LXSession has caused a few people 
headaches... this *may* be part of the problem...
2. Have you tried 14.04 to see if the problem is still here (It is in 
Alpha still... but I use it as my daily driver without any major issues).

I sure hope you can figure out where the issue is.
But your comments make me wonder if that program is causing the 
problem... you might try simply removing it... though I don't know 
everything that comes with it.  It will probably want to remove 
lubuntu-deskop.... (you could force it without recommends if you still 
want that package... though It doesn't really do anything except pull in 
the depends for Lubuntu).


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