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

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Tue Aug 16 09:21:12 UTC 2016


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

--- Comment #9 from Jimi <JimiJames.Bove at gmail.com> ---
Over at the X bug report, I've figured out that when X has AutoAddGPU turned
off, it doesnt crash (meaning that bug is not related to this bug), however,
the card is still automatically bound to amdgpu before I can bind it, which
means 2 things:
1. That's going to be a problem when I'm able to successfully unbinding my card
from amdgpu and will need to be able to respond PCI devices without it
auto-binding to amdgpu, because I'll want to bind it to vfio-pci.
2. That part of the X bug is actually its own bug, which makes sense, because
the card would immediately auto-bind to amdgpu if I tested things without X
running.

So, as far as this bug report is concerned, we actually have 2 bugs going on:
the card can't be unbound, and the card is automatically bound on a rescan,
stopping the user from having a choice in which driver it gets bound to. I
think these 2 issues just may be related. Maybe they even have the same cause?

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