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

Stephen Clark
2006-11-02T17:39:42Z

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