[Bug 56666] New: AMD SUMO GPU lockup when launching any heavy 3D application

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56666

          Priority: medium
            Bug ID: 56666
          Assignee: dri-devel at lists.freedesktop.org
           Summary: AMD SUMO GPU lockup when launching any heavy 3D
                    application
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: runetmember at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 69423
  --> https://bugs.freedesktop.org/attachment.cgi?id=69423&action=edit
AMD SUMO GPU lockup when I launch Unigine Heaven 3

GPU lockup happen for me while launching any heavy 3D application on Radeon HD
6620G. For example GPU lockup 100% reproducible when I launch Unigine Heaven 3
(dmesg attached). It also may happen in web-browser, if browser use rendering
hardware acceleration (for example Firefox with enabled
"layers.acceleration.force-enabled" option).
Lockup is not reproducible when I launch same applications on discrete Radeon
HD 6650M GPU using DRI_PRIME feature, so I guess my issue related to AMD SUMO
GPU's (or maybe to more APU's).

Software:
Kubuntu 12.10 x86_64 updated from Xorg Edgers PPA.
Linux 3.7rc3. With Linux 3.5 and 3.6 is also reproducible,
Mesa: 9.1~git20121029.00e6819e
libdrm-radeon1: git20121025.bc494b31
xserver-xorg-video-radeon: git20120928.e8cb0b72
xserver-xorg-core: 1.13.0+git20120920.70e57668
KDE 4.9.2, desktop effects enabled.

Hardware:
Acer Aspire 7560G laptop, BIOS 2.04,
AMD APU A8-3500M with integrated Radeon HD 6620G (SUMO)
Discrete AMD Radeon HD 6650M (TURKS)

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