[Bug 150731] amdgpu: segfault on unbind in sysfs; card becomes nonresponsive

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Thu Aug 11 23:32:58 UTC 2016


https://bugzilla.kernel.org/show_bug.cgi?id=150731

--- Comment #4 from Jimi <JimiJames.Bove at gmail.com> ---
Created attachment 228411
  --> https://bugzilla.kernel.org/attachment.cgi?id=228411&action=edit
X crash log

Here are my Xorg logs for when I unbind from vfio-pci, remove, and rescan, and
X crashes and comes back with the card bound. The post-crash log is the
Xorg.0.log file, which just shows X loading a desktop that uses both cards
(although the AMD card has "Ignore" set to "true" since it's just meant for
running games with the DRI_PRIME variable), and the crash log is the
Xorg.0.log.old file, which captures the moment of the crash starting at time
[456.336].

You can see there aren't any errors in there. It seems to be just reconfiguring
the graphics because it noticed a new available card, and somehow that resulted
in me being booted back to the login screen. And according to all the tutorials
I've read on switching a card between vfio-pci and X, it shouldn't even be
doing this on its own. It should be waiting for me to bind the card to amdgpu
myself. Why is it doing it automatically and booting me out?

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