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Date: Wed, 11 Mar 2009 12:26:50 +0900
From: Yoshifumi SASAKI <sasaki@ongs.co.jp>
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To: Alexander Motin <mav@FreeBSD.org>
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Cc: freebsd-current@freebsd.org
Subject: Re: Try report: Sony VAIO Type P
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Alexander Motin wrote:
> Alexander Motin wrote:
>> Yoshifumi SASAKI wrote:
>>>   Sound... succeed to load snd_hda.ko
>>>
>>> hdac0: <Intel SCH High Definition Audio Controller> mem
>>> 0x942c0000-0x942c3fff irq 11 at device 27.0 on pci0
>>> hdac0: HDA Driver Revision: 20090215_0128
>>> hdac0: [ITHREAD]
>>> hdac0: HDA Codec #0: Realtek ALC262
>>> pcm0: <HDA Realtek ALC262 PCM #0 Analog> at cad 0 nid 1 on hdac0
>>>
>>>   I receive many messages.And I try to play MP3 data,But not sound.
>>>
>>> interrupt storm detected on "irq5:"; throttling interrupt source
>>> interrupt storm detected on "irq5:"; throttling interrupt source
>>> interrupt storm detected on "irq5:"; throttling interrupt source
>>> interrupt storm detected on "irq5:"; throttling interrupt source
>>
>> snd_hda supports several interrupt modes: MSI, usual interrupts and 
>> polling (interruptless operation). The version you have tested uses 
>> MSI by default. You can switch it to use usual interrupts by setting 
>> hint.hdac.0.msi=0 in loader.conf, or to use polling by 
>> dev.hdac.0.polling=1 sysctl. Also you can try latest CURRENT, as 
>> there were some MSI related changes recently.
>
> According to Intel's official SCH chip errata: "High Definition Audio 
> Does Not Send Interrupts to the CPU When Using the MSI". So may be 
> disabling it is the right way out.
>

First, I set hint.hdac.0.msi=0 in loader.conf. interrupt storm message 
does not stop and not work.
Next, I unset hint.hdac.0.msi=0 and setting dev.hdac.0.polling=1 by 
sysctl command.
interrupt storm message stop and sound music:)

Thanks!

-- 
  Yoshifumi SASAKI, ONGS Inc.