[Nouveau] [Bug 99385] Nouveau produces soft lockups

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99385

Peter Wu <peter at lekensteyn.nl> changed:

           What    |Removed                     |Added
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                 CC|                            |peter at lekensteyn.nl

--- Comment #2 from Peter Wu <peter at lekensteyn.nl> ---
Based on your acpidump for an Alienware 15 R3/0GY3V1, BIOS 1.0.8 11/12/2016
with GTX 1070, I found this in ssdt6.dsl:

        Method (PGOF, 1, Serialized)
        {
...
            If (((\_SB.GGIV (0x01030009) == Zero) || (OSYS == 0x07D9)))
            {
...
            }
            Else
            {
                LKDS (PIOF)
            }
...
        }

This is a common pattern that is known to give issues. The "LKDS" part seems to
cause issues, so you want to force the other code path. As OSYS is 2009 (set in
DSDT), try booting with:

 acpi_osi=! acpi_osi="Windows 2009"

See also https://bugzilla.kernel.org/show_bug.cgi?id=156341

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