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 2.6.33.4 and 2.6.34.2 are good even with KMS enabled * kernels 2.6.35.4 with KMS disabled is good * kernels 2.6.35 and 2.6.35.4 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. lspci: 01:00.0 VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4870] glxinfo: OpenGL renderer string: Mesa DRI R600 (RV770 9440) 20090101 TCL DRI2 OpenGL version string: 2.0 Mesa 7.8.2
Also occurs in: * BZflag Games tried that do not have this problem: * glxgears * Gish * Nexuiz * Armagetron Advanced * OpenTTD * Lugaru HD * OpenArena
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.
Fixed upstream
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