[Bug 98874] Desktop suddenly freezes, login via ssh possible, no error messages, unable to power off

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Nov 28 07:22:22 UTC 2016


Michel Dänzer <michel at daenzer.net> changed:

           What    |Removed                     |Added
          Component|Driver/AMDgpu               |Drivers/Gallium/radeonsi
           Assignee|xorg-driver-ati at lists.x.org |dri-devel at lists.freedesktop
                   |                            |.org
            Product|xorg                        |Mesa
         QA Contact|xorg-team at lists.x.org       |dri-devel at lists.freedesktop
                   |                            |.org

--- Comment #1 from Michel Dänzer <michel at daenzer.net> ---
Sounds like a GPU hang, which is most likely caused by Mesa or LLVM. With the
environment variable GALLIUM_DDEBUG="pipelined 2000" set for the compositor or
Xorg process, the radeonsi driver might detect the hang and dump some
information about it in a file in ~/ddebug_dumps/ . Please attach that file

The failure to recover cleanly from the problem is a kernel issue. You can try
setting amdgpu.lockup_timeout=2000 to make the amdgpu driver detect the hang
and try to reset the GPU, but it doesn't work reliably in general yet.

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