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

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

Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED

--- Comment #29 from Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> ---
(In reply to Joaquín Aramendía from comment #28)
> Created attachment 120071 [details]
> 3.13rc5 patched dmesg
> 
> (In reply to Rafael J. Wysocki from comment #26)
> > nouveau: Possible VGA switcheroo problem fix
> > 
> > If this is exactly the same issue as in bug #61891, this (untested) patch on
> > top of
> > 
> > https://patchwork.kernel.org/patch/3414401/
> > 
> > should work for nouveau.
> 
> I could test it after a struggle. This is what I did:
> 
> Patched the clean 3.13rc5 tarball with both patches and compiled it. After
> that adding the "acpiphp.disable=1" workarround made no difference, so that
> issue might be cleared.

That's what the patch is for, so it looks like it has worked.

I'll the nouveau workaround to https://patchwork.kernel.org/patch/3414401/
then.

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