Re: 2.6.12 sound problem

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Date:	Fri, 29 Jul 2005 23:13:52 -0400
To: Andrew Morton <akpm@osdl.org>

Andrew Morton wrote:

>(Please do reply-to-all when dealing with kernel stuff)
>
>Stephen Clark <stephen.clark@earthlink.net> wrote:
>
>
>>Takashi Iwai wrote:
>>
>>
>>
>>>At Tue, 26 Jul 2005 19:35:55 -0400,
>>>Stephen Clark wrote:
>>>
>>>
>>>
>>>
>>>>Hello List,
>>>>
>>>>
>>>>I recently upgraded my laptop, HP Pavilion N5430, from a 2.4.21 kernel
>>>>to 2.6.12. As a result of
>>>>doing this my sound no longer works correctly. It plays the same thing
>>>>repeatedly some number
>>>>of times - if it plays at all.
>>>>
>>>>Any ideas on how to debug this would be appreciated.
>>>>
>>>>Additional info I don't see any interrupts in /proc/interrupts for the
>>>>Allegro which is on int 5.
>>>>I just tried the same laptop with knoppix and a 2.4.27 kernel and sound
>>>>works great and I do
>>>>see interrupts for Allegro on int 5.
>>>>
>>>>
>>>>
>>>>
>>>The irq problem is likely related with ACPI.
>>>Try to boot once with pci=noacpi.
>>>
>>>
>>>Takashi
>>>-
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>>>
>>>
>>>
>>>
>>Hi Takashi,
>>
>>I have boot the 2.6.12 kernel with acpi=off pci=noacpi,usepirqmask or I
>>get a panic or a hang.
>>
>>
>
>It's just really awful that 2.4 simply worked and 2.6 requires a sprinkle
>of obscure kernel parameters. I shudder to think how long it took you to
>work them out.
>
>
>
>>I don't have to do this with 2.4.27, anybody know why?
>>
>>
>>
>
>Perhaps you could send the `dmesg -s 1000000' output?
>
>
>
Hi Andrew,

Thanks for the response.

I found a better solution to my problem with my HP N5430 laptop over on
the alsa-devel list, my sound had quit working also. The new
solution, which was pointed out to me by Henry Yuan was to boot with
lapic. I had noticed in the dmesg output that a lapic existed but was
turned off by the bios, and a pseudo local apic was being used, this
caused problems with APCI and my sound.

If you would still like the dmesg I would be glad to send it.

Steve
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