Bug 96970 - Graphics artifacts with recent SNA driver
Summary: Graphics artifacts with recent SNA driver
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Chris Wilson
QA Contact: Intel GFX Bugs mailing list
: 98108 (view as bug list)
Depends on:
Reported: 2016-07-18 05:50 UTC by James Miller
Modified: 2019-11-27 13:45 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


Description James Miller 2016-07-18 05:50:04 UTC
A recent version of the SNA driver is causing strange drawing issues on my machine. Areas of the screen will either fail to update, or switch between the correct display and an old version. In both cases, doing something to trigger a redraw in the affected tends to fix it, however it doesn't always, it seems that "smaller" changes don't necessarily fix it. For example, scrolling through logs on the terminal will cause blocks containing the timestamps to stop updating until more than a few characters change within the block.

I have the issue in the driver built from commit 26f8ab5 but not with a508b11.

I am running ArchLinux on a Lenovo ThinkPad T540p. I have an Intel i7 Haswell chip and am using the integrated graphics card.

My Xorg configuration is just set to use SNA and has TearFree enabled. Using UXA fixes the problem, but causes tearing issues (that have always been present). I am also using Bumblebee.
Comment 1 Max 2016-08-24 06:27:06 UTC
Same for me.
Archlinux, Lenovo ThinkPad 440, Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz
Had to switch to UXA.
Comment 2 James Miller 2017-04-04 23:24:20 UTC
Any updates on this issue? It's been almost a year and I haven't seen anything about it. Has this been fixed? I can't really update my driver with this bug in place.
Comment 3 Artem Astafyev 2017-04-05 16:06:58 UTC
Please try the latest sources. I've just installed xserver-xorg-video-intel-2.99.917+git20170309 on Ubuntu and all issues with sna are gone. With old driver xserver-xorg-video-intel-2.99.917+git20160706 it was impossible to work because of these artifacts and I had to switch to uxa acceleration.
Comment 4 Artem Astafyev 2017-04-05 16:10:09 UTC
*** Bug 98108 has been marked as a duplicate of this bug. ***
Comment 5 Martin Peres 2019-11-27 13:45:26 UTC
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