[Help][RS780E][mipsel]Screen corruption sometimes

[Chen Jie]

Hi all,

We're running RS780E on a MIPS64 compatible platform, and encounter
screen corruption sometimes:
 * Do 'x11perf -compwinwin500' -- Window decoration and the background
corrupt (http://dev.lemote.com/files/upload/software/temp/x11perf-corrupt.png)
 * Hardware Accelerated video playback(video-pipe branch of mesa) --
both playback and the desktop:
  - http://dev.lemote.com/files/upload/software/temp/newmobcal1920-playback.png
  - http://dev.lemote.com/files/upload/software/temp/newmobcal1920-desktop-corrupt.png
  - Related thread:
http://lists.freedesktop.org/archives/mesa-dev/2011-August/010064.html

More information:
 1. xf86-video-ati: 6.14.2 with following patches:
  - dri2/eg+: fix size and alignment of depth/stencil
  - dri2: missing bit from a6154c00
  - dri2: fix copy pasto in a6154
  - Register XvMC video decoding acceleration
  - dri2: Update front buffer pixmap and name before exchanging buffers
  - kms: Move flip_count and co. to a per swap structure
  - kms: fix possible leak in pageflip code
 2. Xorg: http://dev.lemote.com/files/upload/software/temp/Xorg.0.log
 3. Linux 2.6.36 (64bit), dmesg:
http://dev.lemote.com/files/upload/software/temp/dmesg.log
 4. Mesa 7.11rc4
 5. libdrm-radeon: 2.4.26-1ubuntu1
 6. compiz: 0.8.6
 7. o32(32bit userland)OS: Based on debian squeeze, and ports some
ubuntu graphical packages.

Any idea? (BTW, don't know if related, but the bandwidth of separated
video ram is really low, about 14MB/s for write op)

Thanks.



Regards,
- Chen Jie