[Bug 89720] New: DRI PRIME offloading corrupts image in fullscreen with DRI3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89720

            Bug ID: 89720
           Summary: DRI PRIME offloading corrupts image in fullscreen with
                    DRI3
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: calcprogrammer1 at gmail.com
        QA Contact: xorg-team at lists.x.org

I have been running Oibaf's driver PPA and Sarnex's DRI3 testing PPA for the
past few months, mainly to be able to play Windows games on Wine with
Gallium-Nine support.

My system is an AMD A8-3870K APU (6550D integrated GPU) with a discrete Radeon
HD 5870 2GB card as well.  The display (a 1080p TV) is connected via VGA to the
integrated port on the motherboard.  I use the 5870 for gaming with
DRI_PRIME=1.

I had been using EXA acceleration, kernels 3.19 and 4.0, and MATE desktop with
no compositing just fine.  Offloading worked correctly for OpenGL and D3D9
alike.

With the recent changes to DRI3, I now am having graphical corruption when
using PRIME to offload a fullscreen window.  It only affects fullscreen
programs, windowed programs offload just fine.  I have tried both glamor and
exa acceleration methods but the issue persists on both.  Corruption takes the
form of blocky tiles which appear out of order and constant flickering.  If I
use the integrated GPU both windowed and fullscreen programs work just fine.

I will upload a short video of the issue to demonstrate it.

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