Comment # 27
on bug 103370
from Michel Dänzer
Thanks for bisecting, but I don't think that commit can be directly responsible for a GPU hang. Before that commit, the DRI3 code in Mesa would only use one back buffer for glxgears, which means that the GPU could only start rendering a new frame after the previous one had finished presenting. Maybe that somehow prevented the hang. A possible test for this theory is running vblank_mode=0 DRI_PRIME=1 glxgears with Mesa 12.0.3; does that also trigger the hang?
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