[Bug 88364] Xorg hangs after videocard switching

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88364

            Bug ID: 88364
           Summary: Xorg hangs after videocard switching
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: lissamour at gmail.com

Created attachment 112158
  --> https://bugs.freedesktop.org/attachment.cgi?id=112158&action=edit
dmesg log

steps to reproduce:
1. launch anything through discrete videocard e. g. DRI_PRIME=1 glxgears

I expected that program will run through discrete videocard, but after little
time xorg hanged.

Ubuntu 14.10 64-bit, kernel 3.18.1, lastest mesa and drivers from oibaf ppa.

0a:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Sun LE
[Radeon HD 8550M / R5 M230] (rev ff)
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 0b)

cat /sys/kernel/debug/vgaswitcheroo/switch 
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynOff:0000:0a:00.0

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