hda_intel: azx_get_response timeout, switching to polling mode..

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I went with FreeBob and an FA-66 firewire audio interface in order to avoid all the nightmares I was having with the hda-intel chip. thought I could avoid the ALSA entirely but apparently not, because I need the ALSA MIDI stuff for my USB keyboard.

I'm getting the following message at boot time:

	Jan 15 18:14:13 mac kernel: ALSA /usr/src/modules/alsa-driver/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:556: hda_intel: azx_get_response timeout, switching to polling mode...

Now, the reason I'm concerned about this is because I'm still getting Xruns on my Mac Mini, even when using FreeBob for jackd, instead of ALSA. 

I am using the ALSA drivers for MIDI. I'm wondering if some of the slowness is due to this "polling mode".

1) Does the "polling mode" apply to all the ALSA drivers (i.e. the snd driver) or just the snd_hda_intel? My MIDI appears to be coming through snd_seq_midi via snd_seq_device  via snd_usb_audio via snd. If it's polling, I'm wondering if that's what's been slowing down my whole system.

2) How can I get this goddamned chip out of "polling mode"??

3) If I rmmod the snd_hda_intel, can I get snd and its variants to go back into interrupt mode? Or do I have to blacklist the snd_hda_intel at boot time in order to get it to change modes?

I apologise for asking a bunch of stupid questions that indicate how completely ignorant I am of how ALSA and all its drivers actually work. But I really just want to get this machine running properly, and I'm getting frustrated.

- -ken
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