https://bugs.freedesktop.org/show_bug.cgi?id=98146
--- Comment #14 from Chris Wilson chris@chris-wilson.co.uk --- (In reply to Darek Deoniziak from comment #13) [snips]
Tried updating drivers (using oibaf ppa all the time) and using single file with settings: Section "Device" Identifier "Graphics" Option "DRI" "3" EndSection
How can I make sure that it is actually used?
[ 5.034] (II) intel(0): [DRI2] Setup complete [ 5.034] (II) intel(0): [DRI2] DRI driver: i965 [ 5.034] (II) intel(0): [DRI2] VDPAU driver: va_gl [ 5.034] (II) intel(0): direct rendering: DRI2 enabled
DRI3 would be mentioned there as well (direct rendering: DRI2 DRI3 enabled). Check your xorg.conf snippet is being loaded. You can check using xf86-video-intel/tools/dri3info and/or glxinfo.