[Nouveau] Acer Aspire V7-582PG (Haswell, GTX 750M) fails to power off GPU via Power Resources

[Zheng, Lv]

Hi,

> From: linux-acpi-owner at vger.kernel.org [mailto:linux-acpi-owner at vger.kernel.org] On Behalf Of Mika
> Westerberg
> Subject: Re: Acer Aspire V7-582PG (Haswell, GTX 750M) fails to power off GPU via Power Resources
> 
> On Fri, Oct 28, 2016 at 02:30:41PM +0200, Peter Wu wrote:
> > It was correctly applied. I did some testing with QEMU, it seems that
> > the \_OSI check is problematic. Removing it makes things work again.
> 
> I hope Bob and Lv can answer why _OSI fails.
> 
> In the meantime I think we should check flags.power_resources in nouveau
> driver (in addition to _PR3) so that it falls back to _DSM if there are
> no power resources (or if we failed to evaluate them for some reason).

IMO, the problem wasn't _OSI, the problem was "If".
"If" is module level here.
So execution order of it in current Linux upstream may be different from Windows.

You can try to modify acpi_gbl_parse_table_as_term_list to TRUE.
To see if this can be solved.

Thanks and best regards
Lv

> --
> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html