Created attachment 121745 [details] journal output Sometimes Xorg freezes when the screens are turned off (from idle or manually with xset dpms off). The rest of the machine keeps working. The X server no longer accepts input and does not turn on the screens. Hardware: 5650M + Intel 460M (muxed) Software: - Linux 4.3+ (not happening on 4.2.4 and older) - xorg-server 1.18.1 - xf86-video-ati 7.6.1 - xf86-video-intel 2.99.917+519+g8229390 I could try to bisect but reproducing for every version would be very time consuming, since the bu does not happen every time. I think it only happens if the screens are off for a long time (15 min+?).
Fixed in v4.16-rc3 with https://git.kernel.org/linus/15734feff2bd Ismo, do you still own this machine? If you boot with radeon.runpm=0, are you able to mux the panel between the GPUs using vga_switcheroo, i.e. does the following work? echo IGD > /sys/kernel/debug/vgaswitcheroo/switch echo DIS > /sys/kernel/debug/vgaswitcheroo/switch
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