Created attachment 122686 [details] xorg log I can't enable tearfree on skylake. -- system architecture: x86_64 -- kernel version: 4.5.0-040500-generic -- Linux distribution: xubuntu 16.04 -- Machine or mother board model: Supermicro X11SSZ-F -- Display connector: 3 displays: 1 DIV, 2 via displayport MST. One displayport using active adapter to enable use of dual link DVI monitor. Issue occurs without MST hub as well. xorg conf: Section "Extensions" Option "XVideo" "Disable" EndSection Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "sna" Option "TearFree" "true" Option "DRI" "true" # Option "DRI" "3" # VideoRam 461632 # sometimes (before i updated the bios, it were useful) EndSection xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu0.1 TearFree won't take, with xorg log reporting: (EE) intel(0): Failed to prepare CRTC for page flipping, disabling TearFree
Created attachment 122687 [details] dmesg
I'm also affected by this: Debian Jessie, kernel 3.16, xserver-xorg-video-intel 2:2.99.917+git20160522-1~bpo8+1, Haswell Refresh CPU/IGP, with external display connected through VGA. On my system, tearfree works just fine, but after some time, maybe some suspending actions, it breaks, and I get the error my my Xorg log Failed to prepare CRTC for page flipping, disabling TearFree
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