[alsa-devel] [2.6.33-rc3] HDA works in polling mode

[Takashi Iwai]

At Sat, 9 Jan 2010 10:22:17 +0000,
Tvrtko Ursulin wrote:
> 
> 
> Hi,
> 
> I have a AMD 785G motherboard where there is a worrying situation logged by 
> ALSA drivers. Sound nevertheless works.
> 
> lspci:
> 00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
> 
> dmesg:
> HDA Intel 0000:01:05.1: PCI INT B disabled                                                       
> HDA Intel 0000:00:14.2: PCI INT A disabled                                                       
> HDA Intel 0000:00:14.2: PCI INT A -> GSI 16 (level, low) -> IRQ 16                               
> HDA Intel 0000:01:05.1: PCI INT B -> GSI 19 (level, low) -> IRQ 19                               
> HDA Intel 0000:01:05.1: irq 28 for MSI/MSI-X                                                     
> HDA Intel 0000:01:05.1: setting latency timer to 64                                              
> hda-intel: azx_get_response timeout, switching to polling mode: last 
> cmd=0x000f0000
> 
> I tried position_fix=0, 1 and 2 with no difference. I also tried enable_msi=0 to 
> make it use IO-APIC interrupt. Then this error is not displayed, sound 
> works, but again no interrupts are generated at least count is not growing in 
> /proc/interrupts.
> 
> Please tell me what else I can try and what debugging info you need.

The switching to polling mode itself isn't a big problem at all.
This can be usually ignored.  If you have any other issues wrt sound
quality, just ignore this.


thanks,

Takashi