[ltp] Re: [RESEND] [PATCH 2/3] Introduce acpi_root_table=rsdt boot param and dmi list to force rsdt

[Thomas Renninger]

On Monday 20 October 2008 20:52:41 Matthew Garrett wrote:
> On Mon, Oct 20, 2008 at 04:47:54PM -0200, Henrique de Moraes Holschuh wrote:
> > On Mon, 20 Oct 2008, Matthew Garrett wrote:
> > > C state transitions, not S state. Working properly here means not
> > > hanging the moment ACPI processor power management starts.
> >
> > I see, but my point remains.  Does a version of Windows that was tested
> > to do C-state transitions on the R50e and R40e even use the XSDT?
>
> Vista is known to run on the R50e. See
> http://forums.lenovo.com/lnv/board/message?board.id=R_Series_Thinkpads&thre
>ad.id=3467 , for instance.

The R50e also works on Linux. See:
http://bugzilla.kernel.org/show_bug.cgi?id=8246
Problem Description: Since kernel 2.6.20 the acpi modules take an unacceptable
time to load.

It is the R40e which cannot do C-state switching.

Both were verified to work with using 32 bit values and both are broken with 
64 bit addresses.

    Thomas