Hi, > From: linux-acpi-owner@xxxxxxxxxxxxxxx [mailto:linux-acpi-owner@xxxxxxxxxxxxxxx] 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@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
