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Siduction Forum => Hardware - Support => Topic started by: renaudmuller on 2016/10/10, 16:29:54

Title: Xorg High CPU consumtion with Intel Sky Lake Integrated Graphic (SOLVED)
Post by: renaudmuller on 2016/10/10, 16:29:54
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 (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: [Select]
Section "Device"
    Identifier "Intel Graphics"
    Driver "intel"
    Option "AccelMethod" "usa"
    Option "DRI" "3"
EndSection

If you're experiencing that kind of problems, try it it did help me a lot.
Title: Re: Xorg High CPU consumtion with Intel Sky Lake Integrated Graphic (SOLVED)
Post by: Lanzi on 2016/10/10, 19:17:51
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.

Title: Re: Xorg High CPU consumtion with Intel Sky Lake Integrated Graphic (SOLVED)
Post by: devil on 2016/10/10, 21:43:19
renaudmuller,


could you please paste the output of
Code: [Select]
apt policy xserver-xorg-video-intel
Title: Re: Xorg High CPU consumtion with Intel Sky Lake Integrated Graphic (SOLVED)
Post by: musca on 2016/10/11, 02:28:43
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
Title: Re: Xorg High CPU consumtion with Intel Sky Lake Integrated Graphic (SOLVED)
Post by: renaudmuller on 2016/10/11, 09:15:59
Hello,
thanks for replying

devil, apt policy xserver-xorg-video-intel :
Code: [Select]
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 http://httpredir.debian.org/debian unstable/main amd64 Packages
        100 /var/lib/dpkg/status
musca, thanks for that, i fixed the typo.