Public bug reported:
Binary package hint: xorg
I'm using a Thinkpad T30 with a builtin Radeon Mobility M7 LW [Radeon
Mobility 7500] card. When upgrading to the Intrepid release candidate,
almost everything worked except compiz. There were apparently no
borders, and there were several graphical glitches. For instance, gnome-
terminal was all white.
I'm using the radeon open source driver which has worked flawlessly in
Hardy.
Tracking the problem, compiz --replace gave the following:
/usr/bin/compiz.real (core) - Warn: No GLXFBConfig for depth 32
/usr/bin/compiz.real (core) - Info: Couldn't bind redirected window 0x30005f1
to texture
That message repeated forever.
This happened in 16bit color depth, 1024x768. When I tried 24bit, there were no
visual problems anymore, only everything running really, really slow. My card
has only 16 MiB of VRAM, so the probable explanation there is that compiz can't
handle the textures at that color depth. 800x600x24 worked, but I would rather
use metacity than a 800x600 compiz.
In the #compiz IRC channel, I together with a few compiz developers
successfully confirmed the bug on a Gentoo machine running Xorg 6.9.0
and a similar card, though with 32MB of ram.
The conclusion we came to is that between Hardy and Intrepid there has
been a regression in the radeon driver that borked the 16bit mode. This
wouldn't be a problem for people running cards with more memory than
16MB since they can switch to 24bit depth.
The bug also exists in the exact same form on the latest LiveCD.
Steps to reproduce:
1. Use a Radeon Mobility M7 LW [Radeon Mobility 7500] with 16 MB of VRAM
2. Switch to 16 bit mode (24bit is the default)
3. Restart X
This bug is important since it affects -all- owners of Thinkpad T30
laptops, as well as other owners of the M7 card.
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
--
[intrepid] Problems with 16bit mode using radeon driver
https://bugs.launchpad.net/bugs/290359
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