Bug 94475

Summary: Texture flickering when render with Chrome
Product: xorg Reporter: Mirko Günther <renegart>
Component: Driver/intelAssignee: Chris Wilson <chris>
Status: RESOLVED MOVED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: Other   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
video showing flickering
none
additional video showing flickering none

Description Mirko Günther 2016-03-10 08:02:49 UTC 
Created attachment 122198 [details]
video showing flickering

We have written a pepper-plugin for chrome using the (internal) API to render with EGL our video content.

On a Intel-GPU we see flickering and corrupted textures.
This effect is seen with the "current" Intel driver on Debian Stretch but not on Ubuntu 15.10.

Starting with this information I could identify via 'git bisect' the first "bad" commit which introduces the issue:

commit b86974ffd435b2339cd873131e0f90aedc9c4a42
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Tue Aug 18 11:36:46 2015 +0100

    sna/dri2: Do full exchanges of back/pending around deferred swaps
    
    References: https://bugs.freedesktop.org/show_bug.cgi?id=91658
    References: https://bugs.freedesktop.org/show_bug.cgi?id=70461
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

Since the environment is a little bit complex to provide a reproducer easily, I've added some videos showing the issue
Comment 1 Mirko Günther 2016-03-10 08:03:47 UTC 
Created attachment 122199 [details]
additional video showing flickering
Comment 2 Martin Peres 2019-11-27 13:43:11 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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