https://bugs.freedesktop.org/show_bug.cgi?id=97549
--- Comment #6 from Eero Tamminen <[email protected]> ---
With modesetting:
* BXT: similar to new X DDX, perf OK (somewhat below X DDX)
* SNB: perf still bad, but better than with Intel DDX
-> on SNB the attached patch is needed to get performance on previous level
regardless of DDX.
Backtraces are from BXT, both with old (last month) X Intel DDX, before and
after the commit. Earlier dri3_update_num_back() was called when getting
buffers, now it's called when swapping.
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