[GM965 EXA] Frame-buffer compression broken for CPU writes (XPutImage)

[Mikko Leppänen]

With GM965 in Intrepid I've experienced frequently cases where individual windows forget to update themselves randomly. This sounds to me very similar as the one reported and fixed upstream here:
http://bugs.freedesktop.org/show_bug.cgi?id=16257

Current fix is to disable framebuffer compression with GM965, although also GEM seems to have an effect in this case.
http://gitweb.freedesktop.org/?p=xorg/driver/xf86-video-intel.git;a=commit;h=d24010b7b3f2419beb40dc5ae1e8aeb3e04b5a93

[Bryce Harrington (bryce)]

Please attach the output of `lspci -vvnn`, and attach your
/var/log/Xorg.0.log file from after reproducing this issue.
If you've made any customizations to your /etc/X11/xorg.conf please
attach that as well.

[Mikko Leppänen (m-leppanen)]

I run my system without any xorg.conf

[Mikko Leppänen (m-leppanen)]

With the attached xorg.conf produced by dpkg-reconfigure xserver-xorg the bug is easily reproduced.

[Mikko Leppänen (m-leppanen)]

With the attached, modified xorg.conf I'm now unable to reproduce the issue. Good enough for me.

Diff:
--- xorg.conf.broken 2008-10-14 23:08:55.000000000 +0300
+++ xorg.conf.works 2008-10-14 23:17:57.000000000 +0300
@@ -20,6 +20,7 @@

 Section "Device"
  Identifier "Configured Video Device"
+ Option "FramebufferCompression" "False"
 EndSection

 Section "Monitor"

[Mikko Leppänen (m-leppanen)]

(couldn't find the bug workflow, let's try this)