Bug 1251694 - Screen flickering and corruption on Intel G41 after xorg-x11-drv-intel update
Screen flickering and corruption on Intel G41 after xorg-x11-drv-intel update
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: xorg-x11-drv-intel (Show other bugs)
x86_64 Unspecified
unspecified Severity medium
: rc
: ---
Assigned To: Lyude
Desktop QE
Depends On:
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Reported: 2015-08-08 16:36 EDT by rudolf
Modified: 2016-04-28 18:07 EDT (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2016-04-28 18:07:05 EDT
Type: Bug
Regression: ---
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RHEL 7.3 requirements from Atomic Host:
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lshw (528 bytes, text/plain)
2015-08-08 16:38 EDT, rudolf
no flags Details

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Description rudolf 2015-08-08 16:36:33 EDT
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):

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 16:38:18 EDT
Created attachment 1060659 [details]
Comment 3 rudolf 2015-08-18 08:36:35 EDT
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 12:40:30 EDT
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"


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

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