Re: [Xen-devel] [patch]Add a new reboot method

[Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>]

> to be affected: Linux post 2.6.22 (iirc) fails to reboot my Dell Precision
> 490 correctly, I have to force it to use the CF9 method. I tried looking
> into the changes that got made in that area, but wasn't able to (spend
> enough time to) pin-point the problem so far.

You might want to boot a 32bit kernel and try acpi=off, if that does the
trick then its (another) ACPI bug and the cf9 is red herring ?

> But I also agree to you and Keir that blindly writing to a port is no good
> idea. It should at least be assured that hardware supports this.

Which takes us back to ACPI. If 0xcf9 is the correct process the ACPI
method should use it.

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