https://bugs.freedesktop.org/show_bug.cgi?id=103370
--- Comment #27 from Michel Dänzer <mic...@daenzer.net> ---
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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