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    |   xen-devel
RE: [Xen-devel] [PATCH 0/4] HVM Virtual S3 
| The symptom is that: if use stdvga in config file, the windows guest
will not show "standby" in shutdown menu, which means S3 is disabled.
The following link explains why.
http://support.microsoft.com/?scid=kb%3Ben-us%3B257562&x=16&y=12 
When use cirrus_vga, the "standby" appears in shutdown menu. However,
after "standby" is pressed, windows will pop up a dialog box, saying
default monitor driver has no power  management support, so windows
refuse to go further. 
I think Windows has strict checking on standby. it won't do standby
until the required device driver has suspend/resume support. so it is
due to qemu device emulation, not ACPI in rombios.
Best Regards
Ke
Kaushik Barde  wrote on 11:14:
> Can you please shed some more light on Windows guest s3 behavior?
> 
> Is it due to inadequate ACPI support in rombios?
> 
> -Kaushik
> 
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