Complete screen corruption and xorg destruction with ccsm-simple and Intel GMA950

[Tomasz Dominikowski]

MSI Wind U100 netbook with Intel GMA950. Desktop effects enabled by default.

1. Install ccsm-simple
2. Run it.
3. Choose Desktop Cube instead of Wall.
4. Choose 4 desktops instead of the default 2.
5. Tick second box in Accessibility tab (in English I think it's Zoom into area)
6. Watch as xorg gets destroyed with no way coming back.

You can't login after that, it just displays the wallpaper, screen corrupts and goes back to login. After a few tries even the login screen gets corrupted. Nothing can be done.

I thought this was hardware failure, it was scary. I eventually manually edited xorg to use VESA, unticked the offending box, got all settings back to default, changed driver back to Intel, all works fine again. Phew! I wish Ubuntu didn't scare me this way!
Xorg kept dying with this as the last line:

AUDIT: Sat Oct 18 22:02:28 2008: 7403 X: client 4 rejected from local host ( uid=0 gid=0 pid=7452 )
AUDIT: Sat Oct 18 22:02:32 2008: 7403 X: client 4 rejected from local host ( uid=1000 gid=1000 pid=7456 )
AUDIT: Sat Oct 18 22:02:32 2008: 7403 X: client 4 rejected from local host ( uid=1000 gid=1000 pid=7457 )
AUDIT: Sat Oct 18 22:02:32 2008: 7403 X: client 4 rejected from local host ( uid=1000 gid=1000 pid=7458 )

Will attach some logs.

Addendum: This is intrepid, fully updated.

[Robert Ancell (robert-ancell)]

Thanks for your bug report. The symptoms provided indicate this is a problem with your video drivers and is being reassigned to the xorg package. For more information on problems with visual effects and video drivers see http://wiki.ubuntu.com/VisualEffects.

[Bryce Harrington (bryce)]

[This is an automatic notification.]

A new major version of the -intel driver is now available in Karmic.

This version includes a major reworking of the acceleration
architecture, which resolves a huge number of issues. We do not know
whether it resolves the issue you reported.

Would you mind testing Karmic Alpha-2 and seeing if it is still a
problem? CD ISO images are available here:

  http://cdimages.ubuntu.com/releases/karmic/

If the issue can still be reproduced on karmic, please report here with
your findings, and attach a fresh Xorg.0.log from your test, and we will
be able to forward the bug upstream.

Otherwise, if the bug no longer exists in Karmic, let us know that as
well.

In the off chance you encounter different bugs while attempting to test
Karmic, please report those as new bug reports.

[Bryce Harrington (bryce)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.

It seems likely to me this bug is gone; the -intel driver has improved immensely in Karmic and a lot of bugs are being reported as no longer present. So hopefully that's the case here too.