[Bug 79688] New: Latest git breaks PRIME Offloading to Nouveau GPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79688

          Priority: medium
            Bug ID: 79688
          Assignee: chris at chris-wilson.co.uk
           Summary: Latest git breaks PRIME Offloading to Nouveau GPU
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: tobias.klausmann at mni.thm.de
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

After upgrading to latest git offloading to the Nouveau card wont work as
expected anymore.

It is quite easy to check:

xrandr --setprovideroffloadsink nouveau Intel

DRI_PRIME=1 glxinfo | grep "OpenGL vendor string"

which was giving the right Vendor for Nouveau, after upgrading it is the Intel
provider, despite the case that 

xrandr --listproviders

still lists the Nouveau card.

Reverting to a older driver (pre DRI3) resovles the problem again. So it may be
a incompatibility betweeen DRI2/3

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