https://bugs.freedesktop.org/show_bug.cgi?id=89734

            Bug ID: 89734
           Summary: GL_AMD_pinned_memory extension causing a kernel
                    hardlock
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: poub365-bugzilla@yahoo.com
        QA Contact: dri-devel@lists.freedesktop.org

Kubuntu 15.04, kernel 4.0rc3, amd hd7850 with recent (from ppa oibaf) open
source drivers. Dolphin emulator runs fine except that I have a complete freeze
when I exit. I have to reboot the computer (although it seems to be still
running as I can remotely log with ssh). I tried under kde,  then under icewm,
to see if it was the compositor's fault. No change. Windowed or fullscreen:
same freeze. I tried to stop Dolphin with the interface buttons: same freeze.

kubuntu 15.04, i7 4770k non overclocked, amd hd7850 on open source drivers.

dmesg log is here:
http://pastebin.ca/2962286

I reported the bug to the Dolphin team. Told me that "Basically it's AMD's
GL_AMD_pinned_memory extension causing a kernel hardlock." and that I have to
report here.

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