Re: [PATCH 10/10] x86, ACPI: default to reboot via ACPI (again)

Zhao Yakui
2008-11-14T01:41:45Z

On Fri, 2008-11-14 at 09:22 +0800, H. Peter Anvin wrote:
> Zhao Yakui wrote:
> > I do the test as required. First the 0x02 is written to 0xCF9 I/O port.
> > The return value by reading the 0xCF9 I/O port is 0x02. Then the 0x06 is
> > written to the 0xCF9 I/O port. The screen becomes black but the box
> > can't be rebooted.
>
> What is the value of the CF9 port before you do anything?
The value is 0x0 before writing 0xCF9 I/O port.
Thanks.
>
> -hpa