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Xorg High CPU consumtion with Intel Sky Lake Integrated Graphic (SOLVED)


Hello everyone

I have experienced some trouble with Xorg and my new laptop ( Acer Aspire S ). The GPU is an Intel Sky Lake Integrated  HD Graphics 520 and I am running Siduction Paint It Black with KDE.

Symptoms : Some actions like selecting files in dolphin would cause Xorg to consume 100 % CPU on one core. Effects are then glitchy. This makes it almost impossible to use dolphin correctly. I also noticed that Xorg was consuming 15% CPU without doing anything.

After doing some research and trying to profile dolphin with valgrind, I found a working (for me  ;) ) solution : Switch from DRI 2 to DRI 3 (

for that, create a file /usr/share/X11/xorg.conf.d/20-intel.conf with following contents :

--- Code: ---Section "Device"
    Identifier "Intel Graphics"
    Driver "intel"
    Option "AccelMethod" "usa"
    Option "DRI" "3"

--- End code ---

If you're experiencing that kind of problems, try it it did help me a lot.

I also use skylake and integrated graphics and I noticed plasma using about 8-10% of CPU-usage. Its not so disturbing, but selecting and copying files (in Krusader) makes my Fan instantaneously hearable.


could you please paste the output of
--- Code: ---apt policy xserver-xorg-video-intel

--- End code ---

there is a typo, please  s/usa/uxa/
Option "AccelMethod" "uxa"Universal Xcelleration Architecture (UXA) is the predecessor of Sandybridge New Accelleration (SNA, the default)


thanks for replying

devil, apt policy xserver-xorg-video-intel :

--- Code: ---xserver-xorg-video-intel:
  Install√© : 2:2.99.917+git20160706-1
  Candidat : 2:2.99.917+git20160706-1
 Table de version :
 *** 2:2.99.917+git20160706-1 500
        500 unstable/main amd64 Packages
        100 /var/lib/dpkg/status

--- End code ---
musca, thanks for that, i fixed the typo.


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