[Bug 101387] amdgpu display corruption and hang on AMD A10-9620P

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101387

            Bug ID: 101387
           Summary: amdgpu display corruption and hang on AMD A10-9620P
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: carlo at caione.org

Created attachment 131886
  --> https://bugs.freedesktop.org/attachment.cgi?id=131886&action=edit
Trace/freeze on amdgpu modprobing

As reported by Daniel Drake in [0] 

We are working with new laptops that have the AMD Bristol Ridge
chipset with this SoC:

AMD A10-9620P RADEON R5, 10 COMPUTE CORES 4C+6G

I think this is the Bristol Ridge chipset.

During boot, the display becomes unusable at the point where the
amdgpu driver loads. You can see at least two horizontal lines of
garbage at this point. We have reproduced on 4.8, 4.10 and linus
master (early 4.12).

Photo: http://pasteboard.co/qrC9mh4p.jpg

In attachment the log taken using netconsole on amdgpu modprobing.


[0] http://www.spinics.net/lists/dri-devel/msg140915.html

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