Re: fc6 kernel 2.6.18-1.2798 breaks acpi on HP laptop n5430

[Stephen Clark]

Sergio Monteiro Basto wrote:

> On Thu, 2006-11-02 at 09:40 -0500, Stephen Clark wrote:
>  
>
> > Sergio Monteiro Basto wrote:
> >
> >    
> >
> > > On Wed, 2006-11-01 at 22:03 -0500, Dave Jones wrote:
> > >
> > >
> > >      
> > >
> > > > On Wed, Nov 01, 2006 at 08:08:31PM -0500, Stephen Clark wrote:
> > > >
> > > >        
> > > >
> > > > > booting without lapic allowed it to boot but now I get
> > > > > ...
> > > > > Local APIC disabled by BIOS -- you can enable it with "lapic"
> > > > > ...
> > > > > Local APIC not detected. Using dummy APIC emulation.
> > > > >  which means more processor overhead - right?
> > > > >
> > > > > also cpuspeed doesn't work anymore - I don't have a cpufreq dir
> > > > >          
> > > > The Duron had powernow ?
> > > >   
> > > >
> > > >        
> > > This story of trying enable lapic when BIOS don't, has been triggered on
> > > kernel2.6.18, but in my opinion is not a bug if lapic on those computers
> > > don't work.
> > >
> > > If you boot without enable lapic, you will see cat /proc/interrupts with
> > > interrupts in XT-PIC.
> > > if you try enable lapic, somehow IRQ routing should change 
> > > and if /proc/interrupts still the same, with IRQs in XT-PIC.
> > > I think, lapic still not enabled and the most you can get it's problems.
> > > Unless you know that lapic works (it is programmed and BIOS wrongly
> > > disable it), you shouldn't try enable lapic because it is probable that
> > > just give problems, to you. 
> > > Historically: In 2002/3 was a very common bug, when kernel was compiled
> > > to support lapic and try enable lapic (even when BIOS don't) and
> > > computer hangs on boot. 
> > >
> > >
> > >      
> > Loading the correct kernel arch 686 - fixes my powernow problems - this 
> > is a mobile duron.
> >
> > Booting with lapic worked fine on  fc5 kernel-2.6.18-2200 but it causes 
> > fc6 kernel-2.6.18-2798
> > to hang.
> >    
>
> With lapic boot option enabled, have you a different /proc/interrupts ? 
> have you lapic working ? 
>
>
>
>  
No interrupt assignments are the same - but what about the hi-res timer 
the lapic is
supposed to have and linux is suppose to use?

Steve

--

"They that give up essential liberty to obtain temporary safety, 
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty 
decreases."  (Thomas Jefferson)



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