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.
------
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
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