Try report: Sony VAIO Type P

[Alexander Motin]

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.

-- 
Alexander Motin