Bug 1251694

Summary: Screen flickering and corruption on Intel G41 after xorg-x11-drv-intel update
Product: Red Hat Enterprise Linux 7 Reporter: rudolf
Component: xorg-x11-drv-intelAssignee: Lyude <lyude>
Status: CLOSED CURRENTRELEASE QA Contact: Desktop QE <desktop-qa-list>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 7.1CC: lyude
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2016-04-28 22:07:05 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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lshw none

Description rudolf 2015-08-08 20:36:33 UTC 
Description of problem:

Screen flickers after update to latest xorg-x11-drv-intel.
It happens when clicking on top menu in Gnome Classic, and it looks like big black triangle or rectangle shaped artifact, usualy on top half of screen and different size every time. In worst cases whole screen turns blue.

Version-Release number of selected component (if applicable):
2.99.916-5


Additional info:

Happens on clean 7.1 installation, not on 7.0 with driver version 2.21.15-13.
Sometimes imposible to reproduce. Hardware is most likely OK, never happened to me on different distributions with gnome 3.

Nothing unusual in logs, KDE doesnt seem to be affected.
Comment 1 rudolf 2015-08-08 20:38:18 UTC 
Created attachment 1060659 [details]
lshw
Comment 3 rudolf 2015-08-18 12:36:35 UTC 
I can confirm this issue exists also on HP Elite 8000 with Intel Q45 chipset.
Both G41 and Q45 have integrated VGA Intel GMA 4500
Comment 4 rudolf 2015-08-23 16:40:30 UTC 
I did some testing and problem disappears if I use UXA acceleration, or SNA acceleration combined with TearFree.

so these configurations work for me:

cat /etc/X11/xorg.conf.d/20-intel.conf
Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod" "sna"
   Option      "TearFree"    "true"
EndSection


or..

Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod" "uxa"
EndSection
Comment 5 rudolf 2015-09-13 09:31:05 UTC 
This problem is not present in 7.2 beta