Hello,
So to finalize the test, I've completely removed the xorg-edgers ppa,
then installed the upstream kernel 3.8 and repeated the test:
BEFORE SUSPEND:
2275 frames in 5.0 seconds = 454.603 FPS
1891 frames in 5.0 seconds = 376.568 FPS
1979 frames in 5.0 seconds = 395.401 FPS
1946 frames in 5.0 seconds = 388.845 FPS
AFTER RESUME FROM SUSPEND:
344 frames in 5.0 seconds = 68.662 FPS
312 frames in 5.0 seconds = 62.122 FPS
321 frames in 5.0 seconds = 64.103 FPS
347 frames in 5.0 seconds = 69.071 FPS
So with this upstream kernel, the slowdown is even more visible than
with 3.5. It seems that the best situation is with xorg-edgers ppa
installed.
BUT I've also noticed one other thing. When I installed the upstream
kernel 3.8 for the first time, I forgot to install the extras, so I was
thrown into llvmpipe, because radeon driver failed to load. I did a test
with that one too and there was NO slowdown nor any change when
measuring before suspend and after resume. So with LLVM, all works as it
should (though it is choppy, but the framerate is exactly the same
before and after suspend). My guess is that the bug is somewhere in the
radeon driver (the fact that using xorg-edgers helps it a little bit,
supports this).
If you need any additional tests, please let me know.
Best regards,
Roman
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-bug-exists-upstream
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https://bugs.launchpad.net/bugs/1102318
Title:
Slow system after resume from suspend
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