Confirmed fix on 12.04 kubuntu
Uncheck the default checked checkbox (in menu edit/preferences) use
ffmpeg instead of mencoder should bypass the problem
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I would say that this brings Nvidia 96 driver to the top of the list as
the likely culprit. I do not have to do any user switching at all. Just
a logout from the intitial session (kde or fluxbox), passing control
back to KDM will cause the issue. Xorg.log does not contain any
indication of what
Well, I just went to shut that system down and the bug is back.
Currently running the Nouveau driver. This time there is no high CPU
use. I did not have to kill Xorg but I did sudo /etc/init.d/kdm restart
to get my screen back. So it is some issue with the logout transition. I
can help test more
OK, I removed the Nouveau driver as well and X now starts with the NV
driver. I can freely login/logout and switch between KDE/fluxbox with no
black screen lockups. So this once more appears to be a video driver
issue.
To recreate on my system.
1. Boot into X running either Nvidia 96 series or
Duplicated on Kubuntu 10.04. Running KDM with either KDE or fluxbox
results in blank screen on logout (exit) from X session. SSH from
another computer reveals that Xorg is at 100% cpu. Kill xorg followed by
sudo /etc/init.d/kdm restart from ssh will get you back up and running.
Removing nvidia
