[Bug 64891] [snd_hda_codec] BUG: soft lockup - CPU#0 stuck for 22s (when using vgaswitcheroo)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=64891

--- Comment #31 from Rafael J. Wysocki <rjw at rjwysocki.net> ---
It looks like the ACPIPHP is not sufficient in your case, because it still
tries to remove some devices in response to the event signaled after _DSM
execution.

We'll need some more debug info to figure out what is going on.

Please remove the patches you have applied so far and apply this one instead:

https://patchwork.kernel.org/patch/3416861/

This contains the nouveau part already.

I'll let you know what to apply in addition to that.

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