*** This bug is a duplicate of bug 573101 ***
https://bugs.launchpad.net/bugs/573101
** Description changed:
+ [Copycat - A blackscreen can also appear due to a bug in the Gnome
+ screensaver. (goto bug #546578)]
+
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. Remote login to the machine using
NX w/o issue.
3. reboot the machine from the remote ssh.
Attempts to resolve:
1. Ensured that the problem exists with enhanced graphics turned off
(System|Preferences|Appearance|Visual Effects|None)
2. Ensured that the problem wasn't related to gnome-screensaver as per
similar reports (purged gnome-screensaver, installed gnome-screensaver
2.30.0-0ubuntu2 etc).
Workaround:
Remove nvidia-96 and reboot. All switching between users then works properly.
Reinstall nvidia-96 and the problem occurs.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: nvidia-96 96.43.17-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Tue May 25 19:53:36 2010
DkmsStatus:
vboxdrv, 3.2.0, 2.6.32-22-generic, i686: installed
vboxnetadp, 3.2.0, 2.6.32-22-generic, i686: installed
nvidia-96, 96.43.17, 2.6.32-21-generic, i686: installed
nvidia-96, 96.43.17, 2.6.32-22-generic, i686: installed
vboxnetflt, 3.2.0, 2.6.32-22-generic, i686: installed
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic
root=UUID=c606c2a7-1fb1-403f-9b90-52f5f150340b ro quiet splash
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: nvidia-graphics-drivers-96
dmi.bios.date: 09/29/2004
dmi.bios.vendor: Intel Corp.
dmi.bios.version: BF86510A.86A.0069.P21.0409290100
dmi.board.name: D865GBF
dmi.board.vendor: Intel Corporation
dmi.board.version: AAC25843-408
dmi.chassis.type: 2
dmi.modalias:
dmi:bvnIntelCorp.:bvrBF86510A.86A.0069.P21.0409290100:bd09/29/2004:svn:pn:pvr:rvnIntelCorporation:rnD865GBF:rvrAAC25843-408:cvn:ct2:cvr:
glxinfo: Error: [Errno 2] No such file or directory
system:
distro: Ubuntu
codename: lucid
architecture: i686
kernel: 2.6.32-22-generic
--
Logout after switch user causes black screen and disables keyboard and mouse
https://bugs.launchpad.net/bugs/585685
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