[Bug 100399] Kernel invalid opcode on unbinding amdgpu

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100399

--- Comment #6 from jimijames.bove at gmail.com ---
(In reply to Michel Dänzer from comment #5)
> (In reply to jimijames.bove from comment #4)
> > Before I switched to AMD, I was passing an NVidia GPU (GTX 660) into my
> > virtual machine, and I could unbind and rebind it between nouveau and
> > vfio-pci as much as I wanted. No trouble at all. Even while X was running,
> > once DRI3 support came.
> 
> You can still do that with DRI3, you just have to prevent Xorg from using
> the secondary GPU, e.g. via
> 
> Section "ServerFlags"
>        Option  "AutoAddGPU" "off"
> EndSection
> 
> in /etc/X11/xorg.conf.

Well, sort of. That option is what allows me to bind the card to amdgpu without
X crashing (even though I've been told in the past that I shouldn't need that
option for that functionality), but this bug--not being able to UNbind it from
amdgpu--does not go away with that option.

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