Hello Stefan and Patrik, many thanks for your answers. No, I didn't try the modesetting driver till yet. Because the xf86-video-intel driver using DRI3 seems to be stable enough for me. I used it by the home:pontostroy:X11/Mesa repo. But this repo is Mesa 13.1-Dev branch an now Mesa 13.0.x should be good enough for gaming. So I want to switch to a stable Mesa release. How can i try the modesetting driver? If I configured 50-device.conf to ---------------------------- Section "Device" Identifier "Intel Graphics" Driver "modesetting" Option "DRI" "3" EndSection ---------------------------- gives the following Xorg.0.log ---------------------------- [ 4.176] (==) AIGLX enabled [ 4.176] (II) LoadModule: "intel" [ 4.176] (II) Loading /usr/lib64/xorg/modules/drivers/intel_drv.so [ 4.179] (II) Module intel: vendor="X.Org Foundation" [ 4.179] compiled for 1.18.3, module version = 2.99.917 [ 4.179] Module class: X.Org Video Driver [ 4.179] ABI class: X.Org Video Driver, version 20.0 [ 4.179] (II) LoadModule: "modesetting" [ 4.179] (II) Loading /usr/lib64/xorg/modules/drivers/modesetting_drv.so [ 4.180] (II) Module modesetting: vendor="X.Org Foundation" [ 4.180] compiled for 1.18.3, module version = 1.18.3 [ 4.180] Module class: X.Org Video Driver [ 4.180] ABI class: X.Org Video Driver, version 20.0 [ 4.180] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets: i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G, ... [ 4.180] (II) modesetting: Driver for Modesetting Kernel Drivers: kms [ 4.185] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20151010 [ 4.185] (WW) Falling back to old probe method for modesetting ... [ 4.186] (II) Loading sub module "dri2" [ 4.186] (II) LoadModule: "dri2" [ 4.186] (II) Module "dri2" already built-in [ 4.186] (II) Loading sub module "present" [ 4.186] (II) LoadModule: "present" [ 4.186] (II) Module "present" already built-in [ 4.186] (II) UnloadModule: "modesetting" [ 4.186] (II) Unloading modesetting -----------------------------