Created attachment 115612 [details] FPS changed Hi, I encountered a problem. When I move the mouse in the game, FPS will be reduced from 60 to 30. It will be restored when the mouse stops again, or tap and hold the screen in the game. (Not a performance issue). This problem also exist when use Bumblebee and nvidia card. When the FPS decreases, the cursor have a slight flicker. This problem does not exist on linux 3.19.3. Disable vsync no effect. ========== PS: I try to use git bisect to find the bug, but I encountered another problem cause I can not test it. On commit ea2c67bb4affa84080c616920f3899f123786e56, something that causes the entire screen freezes when move the mouse and mouse movement slow and delayed. It seems to have been fixed, but I did not find the relevant patches. So I can not bypass it for other tests, and the two are somewhat similar bug. ========== System: Intel(R) Core(TM) i7-4710HQ NVIDIA GeForce GTX 850M Linux 4.0.1-1-ARCH xf86-video-intel 2.99.917-5 nvidia 349.16-2 xorg-server 1.17.1-5 wine 1.7.41-1
It's not clear from the description if you are running with an Intel GPU. If you are, please add drm.debug=0x1e to your kernel command line and attach dmesg for the both the kernel that has the issue and the one that doesn't, for comparison.
Created attachment 115704 [details] Operating normally log
Created attachment 115705 [details] Abnormal operation log Abnormal operation log, a large number of [106.436456] [drm: drm_atomic_set_fb_for_plane] Set [FB: 48] for plane state ffff880409564b40
This BUG was fixed in Linux 4.0.5, FPS no longer dropped.
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