ACPI problems on HP Compaq nx6325

[John Baldwin]

On Tuesday 23 January 2007 01:38, Nate Lawson wrote:
> John Baldwin wrote:
> > On Sunday 21 January 2007 17:24, Nate Lawson wrote:
> >> Joerg Wunsch wrote:
> >>> As Nate Lawson wrote:
> >>>
> >>>>> Have a look at PR i386/104678, and the patches referenced there.
> >>>>> Using these patches, my nx6325 works reasonably well.  ...
> >>>> I looked at this and the solution should be "don't use anything
> >>>> other than C1".
> >>> Nothing else is supported on the nx6325 anyway, only C1.  So that's
> >>> certainly not the problem here.
> >> If nothing other than C1 is supported, I am almost certain the patch 
> >> doesn't affect anything.  So what problem were you seeing and how is it 
> >> changed?
> > 
> > These CPUs turn off the lapic timer in C1.
> > 
> 
> Apologies for my mistake.  I see now that there's not an easy fix to 
> this.  Should we make it easier for such people to use some other timer 
> but not mixed mode?  What about the HPET given that these are very new 
> systems and should have it?

What I've been meaning to do is allow them to just use IRQ8 plus IPIs
instead of the lapic timer.  Another possibility is to use either the HPET
or IRQ 8 as a deadline to simulate an lapic timer tick while we are in C1,
though IRQ 8 isn't really suited to this for SMP systems.

-- 
John Baldwin