X crashes when changing to xinerama mode while compiz is enabled

[Henneyng]

Binary package hint: gnome-control-center

I have a notebook with intel 945 graphic adapter, internal 1024*768 screen and an external 1280*1024 LCD.
Compiz runs well in clone mode, also xinerama works when compiz is disabled.
The problem occurs with every user (also with a newly created one).

When compiz is running and I try to change from clone- to xinerama-mode using gnome-display-properities, the screen becomes black, only the mice is visible and working. When I kill X with Alt-Print-K, on my notebook screen gdm appears, but on the external screen there are only grey vertical stripes and the cloned mice. This behavior is visible after login, too. However, after I logged out again, it works fine.

If I disable desktop-effects and enabled xinerama afterwards, xinerama works. If I try to enable desktop-effects again, I receive a message box containing "Die Desktop-Effekte konnten nicht aktiviert werden.".

The problem is reproducible, so feel free to ask further questions.

ProblemType: Bug
Architecture: i386
Date: Sun Oct 25 11:03:19 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/gnome-display-properties
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release Candidate i386 (20091020.3)
Package: gnome-control-center 1:2.28.1-0ubuntu1
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: gnome-control-center
Uname: Linux 2.6.31-14-generic i686

[Sitsofe Wheeler (sitsofe)]

This might be a dup of bug 441873 ...

[Bryce Harrington (bryce)]

Hi henneyng,

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering is this still an issue for you? Can you try with the latest development release of Ubuntu? (ISO CD images are available from http://cdimage.ubuntu.com/releases/)

If it remains an issue, could you also attach a new /var/log/Xorg.0.log?
Thanks in advance.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Henneyng (henneyng)]

Hello,

I tried to activate xinerama while compiz is active again with alpha 3 of Ubuntu 10.4.

When I deactivate clone mode in gnome-display-properities the screen become black. However, the pointer of the mice is visible and I can move the pointer on both screen (so xinerama seems to work). On the left side there is also a small vertical line (maybe one pixel in width) and it seems that there are windows hiding. When I try to move them with Alt+Mouse, the colors of the line changes; it seems that all windows are working. After a few time, gnome-display-properities resets to clone mode.

The xorg log is attached.

[Henneyng (henneyng)]

I've made a screenshot, too, where you see the described line. Hope this helps.

If you need further information please do not hesitate to contact me.

Kind regards,
Henning

[Bryce Harrington (bryce)]

[This is an automatic notification.]

Hi Henneyng,

This bug was reported against an earlier version of Ubuntu, can you
test if it still occurs on Lucid?

Please note we also provide technical support for older versions of
Ubuntu, but not in the bug tracker. Instead, to raise the issue through
normal support channels, please see:

    http://www.ubuntu.com/support

If you are the original reporter and can still reproduce the issue on
Lucid, please run the following command to refresh the report:

  apport-collect 460306

If you are not the original reporter, please file a new bug report, so
we can work with you as the original reporter instead (you can reference
bug 460306 in your report if you think it may be related):

  ubuntu-bug xorg

If by chance you can no longer reproduce the issue on Lucid or if you
feel it is no longer relevant, please mark the bug report 'Fix Released'
or 'Invalid' as appropriate, at the following URL:

  https://bugs.launchpad.net/ubuntu/+bug/460306

[Henneyng (henneyng)]

The Bug appears also in Lucid. By the way the bug appears also with the new gnome-shell.

[Launchpad Janitor (janitor)]

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]