I am exeriencing the same issue - with the exception that both the
keyboard and mouse go dead as well. If there is another bug report the
more closely matches my symptions, please advise.
Steps to reproduce:
1. While logged in as user A, System|Log Out <username>|Switch User
2. Login to user B, ensure all is working properly and logout from user B.
- screen goes black
- keyboard no longer works
- mouse no longer works
100% reproduceable.
However, I can:
1. ssh -X into the machine w/o issue. I can bring up gui's from the affected
machine (i.e., gnome-system-log, vino-preferences, etc).
2. remote login to the machine via VNC and get a screen; however I then get
multiple tserver instances & have to kill it.
3. reboot the machine from the remote ssh.
Attempted to use 'apport-collect 546578' to supply additional info, but
response was that I wasn't a subscriber to this bug (I am) and the
report was a duplicate (it isn't). So I'll manually add the bits that
may be relevant:
2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:27:30 UTC 2010 i686
GNU/Linux
$ apt-cache policy gnome-screensaver
gnome-screensaver:
Installed: 2.30.0-0ubuntu2
Candidate: 2.30.0-0ubuntu2
Version table:
*** 2.30.0-0ubuntu2 0
500 http://us.archive.ubuntu.com/ubuntu/ lucid-proposed/main Packages
100 /var/lib/dpkg/status
2.30.0-0ubuntu1 0
500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages
$ apt-cache policy xorg
xorg:
Installed: 1:7.5+5ubuntu1
Candidate: 1:7.5+5ubuntu1
Version table:
*** 1:7.5+5ubuntu1 0
500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages
100 /var/lib/dpkg/status
$ apt-cache policy xserver-xorg-core
xserver-xorg-core:
Installed: 2:1.7.6-2ubuntu7
Candidate: 2:1.7.6-2ubuntu7
Version table:
*** 2:1.7.6-2ubuntu7 0
500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages
100 /var/lib/dpkg/status
$ apt-cache policy nvidia-96
nvidia-96:
Installed: 96.43.17-0ubuntu1
Candidate: 96.43.17-0ubuntu1
Version table:
*** 96.43.17-0ubuntu1 0
500 http://us.archive.ubuntu.com/ubuntu/ lucid/restricted Packages
100 /var/lib/dpkg/status
*-display
description: VGA compatible controller
product: NV25GL [Quadro4 900 XGL]
vendor: nVidia Corporation
Note that there is no ATI in this machine. Given that I can reproduce &
can get into the machine to gather information, please let me know if I
can provide any added logs etc.
--
black screen after a few user switches
https://bugs.launchpad.net/bugs/546578
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