[Bug 90451] New: Dedicated gpu on HP 355 G2 not working correctly (slower than integrated+corrupt display in es2gears)

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=90451

            Bug ID: 90451
           Summary: Dedicated gpu on HP 355 G2 not working correctly
                    (slower than integrated+corrupt display in es2gears)
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.16
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: l55@anonymousspeech.com
        Regression: No

The HP 355 G2 has an integrated R5 Mullins and a dedicated Hainan GPU(R5 M240).
Only the integrated one seems to work correctly.

When running "DRI_PRIME=1 es2gears"(dedicated) i get corrupt image and lower
fps than with "es2gears"(integrated), while i think the dedicated should be way
better. These are the results on Ubuntu 14.10(kernel 3.16).

I also tried the Gears on Gallium livedvd (2014.12.25) with kernel 3.19-rc1 and
devel mesa/xorg/radeon drivers ( http://www.gearsongallium.com/?p=1668 ).
With Gears on Gallium the switchable graphics don't seem to work at all, it
seems to use the integrated gpu always, even with DRI_PRIME=1.

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