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

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renaudmuller:
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 (http://www.phoronix.com/scan.php?page=article&item=intel-skylake-dri3&num=1)

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"
EndSection

--- End code ---

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

Lanzi:
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.

devil:
renaudmuller,

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

--- End code ---

musca:
Hello,
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)

greetings
musca

renaudmuller:
Hello,
thanks for replying

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

--- Code: ---xserver-xorg-video-intel:
Installé : 2:2.99.917+git20160706-1
Candidat : 2:2.99.917+git20160706-1
Table de version :
*** 2:2.99.917+git20160706-1 500
500 http://httpredir.debian.org/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status

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

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