https://bugzilla.kernel.org/show_bug.cgi?id=117931
--- Comment #3 from Eugene A. Shatokhin eugene.shatokhin@rosalab.ru --- Re-checked on Fedora 23 x64 with the mainline kernel 4.7-rc7, git rev 68093c43f352, with no additional patches.
Resume from hibernation is not fully working yet but the problem looks different this time.
When I put the system to suspend-to-disk then try to resume it, the desktop environment appears this time but does not respond to keyboard, mouse, whatever.
The system log contains lots of meesages "radeon: The kernel rejected CS, see dmesg for more information.".
Xorg.0.log ends with the following: [ 1608.239] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip completion event has impossible msc 78924 < target_msc 78925
I will attach the logs below.
Besides, after I have done suspend-to-ram and resumed the system (without prior reboot after the problem happened), the desktop seemed to be operational again after a couple minutes.
Interestingly enough, lspci shows incomplete info for one of the GPUs this time (was OK with the earlier kernels): ------------------- 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M] [1002:6741] (rev ff) (prog-if ff) !!! Unknown header type 7f Kernel driver in use: radeon Kernel modules: radeon ------------------- May be it is not related to the problem, may be it is.