[Bug 62882] New: Lockup after attempt to enable discrete Radeon GPU on Linux 3.9rc4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=62882

          Priority: medium
            Bug ID: 62882
          Assignee: dri-devel at lists.freedesktop.org
           Summary: Lockup after attempt to enable discrete Radeon GPU on
                    Linux 3.9rc4
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: runetmember at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: DRM/Radeon
           Product: DRI

Created attachment 77173
  --> https://bugs.freedesktop.org/attachment.cgi?id=77173&action=edit
crash log

When I try to enable discrete GPU I get kernel module crash (please look into
attached log) and system lockup (few seconds later).

Software:
Kubuntu 13.04 x86_64 updated from Canonical X Staging PPA (there is just stable
X.Org Server 1.14, stable Mesa 9.1 and stable 7.1.0 radeon driver)
Linux 3.9rc4 
Mesa: 9.1
libdrm-radeon1: 2.4.43
xserver-xorg-video-radeon: 7.1.0
xserver-xorg-core: 1.14.0

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

"xrandr --listproviders" output:
Providers: number : 2
Provider 0: id: 138 cap: 0xf, Source Output, Sink Output, Source Offload, Sink
Offload crtcs: 2 outputs: 3 associated providers: 1 name:radeon
Provider 1: id: 85 cap: 0xf, Source Output, Sink Output, Source Offload, Sink
Offload crtcs: 6 outputs: 0 associated providers: 1 name:radeon

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