Created attachment 122686 [details]
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.
Option "XVideo" "Disable"
Identifier "Intel Graphics"
Option "AccelMethod" "sna"
Option "TearFree" "true"
Option "DRI" "true"
# Option "DRI" "3"
# VideoRam 461632 # sometimes (before i updated the bios, it were useful)
TearFree won't take, with xorg log reporting:
(EE) intel(0): Failed to prepare CRTC for page flipping, disabling TearFree
Created attachment 122687 [details]
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