[Bug 35457] [rs690m] Graphics corruption with ati x1200

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Mar 14 14:43:19 PDT 2012


--- Comment #22 from boulte <cboulte at gmail.com> 2012-03-14 14:43:19 PDT ---
I have a packard bell dot m/a (radeon x1270) and have the issue described in
this bug. My setup:
 * kernel 3.2
 * libdrm 2.4.30
 * mesa 7.11.2

I replaced the bios with a modded one that allow tweaking of video ram type. I
tried two settings: uma only and uma+sideport.

 * UMA (256M)
   * No graphic corruption
   * No laggy window movement
   * glxgear fps ~= 360

 * UMA+sideport (256M+64M)
   * Massive graphic corruption
   * Laggy window movement
   * glxgears fps ~= 200

A diff between dmesg output:
$ diff dmesg.uma dmesg.uma+sideport 
< [drm] Detected VRAM RAM=256M, BAR=256M
> [drm] Detected VRAM RAM=384M, BAR=256M
< [drm] radeon: 256M of VRAM memory ready
> [drm] radeon: 384M of VRAM memory ready
< [drm] PCIE GART of 512M enabled (table at 0x000000006C180000).
> [drm] PCIE GART of 512M enabled (table at 0x000000006B800000).
> [drm] radeon: power management initialized

Hope it can help. I can make more test if needed.

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