Messages in this thread | | | Date | Thu, 02 Nov 2006 12:39:32 -0500 | From | Stephen Clark <> | Subject | Re: fc6 kernel 2.6.18-1.2798 breaks acpi on HP laptop n5430 |
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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
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