I am getting severe flickering in multiple SDL-based games with Radeon HD 4870 (RV770)
Games tested that have this problem:
* World of Goo (SDL, 32-bit)
* Frets on Fire (Python, SDL, true 3D, 64-bit)
* Aquaria (SDL, 32-bit)
* kernels 188.8.131.52 and 184.108.40.206 are good even with KMS enabled
* kernels 220.127.116.11 with KMS disabled is good
* kernels 2.6.35 and 18.104.22.168 with KMS enabled is bad
The problem manifests itself in substantial flickering; most frames seem to render OK, but a couple of times every second there's an incomplete frame. The incomplete frame looks like a half-rendered scene, with some objects missing.
Using xorg-server 1.9.0, mesa 7.8.2, xf86-video-ati-6.13.1
(also tried mesa from git)
Normally I have 2 screens attached, but this time I also tried disabling the second screen and unplugged it entirely.
01:00.0 VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4870]
OpenGL renderer string: Mesa DRI R600 (RV770 9440) 20090101 TCL DRI2
OpenGL version string: 2.0 Mesa 7.8.2
Also occurs in:
Games tried that do not have this problem:
* Armagetron Advanced
* Lugaru HD
This is probably vsync related. Does updating to the latest ddx and mesa code in git fix the issue?
(In reply to comment #2)
> This is probably vsync related. Does updating to the latest ddx and mesa code
> in git fix the issue?
Ok, I also built xf86-video-ati from git (in addition to dri2proto, libgl, mesa) and I am still experiencing this problem.
Indeed, Mesa git fixes it; sorry I was using Mesa git with r600_dri.so from 7.8 before.