https://bugs.freedesktop.org/show_bug.cgi?id=104064

--- Comment #12 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to taijian from comment #11)
> Addendum: What DOES work now without crashing the system is dynamically en-
> and disabling the dGPU via
> 
> # echo "\\_SB.PCI0.PEG0.PEGP._{OFF|ON}" > /proc/acpi/call
> 
> So that is definitely progress!

Are you messing with that while the driver is loaded?  Doing so will cause
problems because you're changing the hw state behind the driver's back.

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