於 五，2013-07-12 於 09:37 +0200，Thomas Renninger 提到： > On Friday, July 12, 2013 04:50:22 AM joeyli wrote: > > 於 四，2013-07-11 於 14:14 +0200，oliver@xxxxxxxxxx 提到： > ... > > On the other hand, I saw another BIOS changed hardware_signature because > > the VGA detect output resolution changed when S4 resume. It's a problem > > for sometimes BIOS widely used hardware_signature on non-critical > > hardware change. > > I wonder how Windows is handling that. > The spec is rather clear and OS should abort the resuming: > ------ > 5.2.10 Firmware ACPI Control Structure (FACS) > ... > If the values are not the same, OSPM assumes > that the saved non-volatile image is from a different hardware > configuration and cannot be restored. Thanks for your kick. Per information from OEM, Windows 8 didn't really block S4 resume when hardware_signature not match, I think as Oliver's patch. > ------ > I would say either: > - someone checks Windows behavior and if they do it wrong > and still resume, resuming unconditionally is an option. > But they might fix this at some point of time and force vendors > to do things right, then we would still try to resume even we > must not. > > - a boot parameter for the poor souls with such BIOS defects > so that they can still resume > > > My 2 cents, > > Thomas > -- I agreed your point, we should find a machine make sure the hardware_signature changed by BIOS then install Windows 8 to verify the behavior. Thanks a lot! Joey Lee -- 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
