[Bug 101946] Rebinding AMDGPU causes initialization errors [R9 290]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101946

--- Comment #22 from Luke A. Guest <laguest at archeia.com> ---
I'd like to report a minor success. I've managed to boot into win8.1 twice in a
row. I booted as normal through virt-manager, then shutdown from inside the
guest, then called a script:

#!/bin/sh

echo 1 > /sys/bus/pci/devices/0000\:03\:00.0/remove
echo 1 > /sys/bus/pci/devices/0000\:03\:00.1/remove
echo 1 > /sys/bus/pci/rescan

/opt/vfio/rebind_dev_to_vfio.sh 0000:03:00.0
/opt/vfio/rebind_dev_to_vfio.sh 0000:03:00.1

Then restarted the guest from virt-manager, booted fine, again I shutdown from
within the guest.

On running the above script a second time, the machine hung, hard. I couldn't
login through serial, sysrq keys didn't do anything.

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