[alsa-devel] Intel HDA audio on EEE PC 1101HGo

[Takashi Iwai]

On Fri, 13 Jan 2017 20:42:06 +0100,
Enrico Mioso wrote:
> 
> Hello guys.
> I finally can report some interesting news.
> Now audio stopped working - still, the system didn't panic. So I consider this a good good point.
> My system is alive and I can keep it alive indefinitely, clearly if hardware doesn't break and/or other events out of my control cause an interruption.
> 
> In my dmesg, the following messages started to appear:
> snd_hda_intel 0000:00:1b.0: azx_get_response timeout, switching to polling mode: last cmd=0x020c0000

I suppose the last_cmd value isn't always same?

> snd_hda_codec_realtek hdaudioC0D0: Unable to sync register 0x1f0e00. -5

Hm, this might be an invalid verb.

> And they appear apparently when the driver tries to send new commands to the device, but this is only my impression.
> Let me know what I could do to report on what's happening. My system is acually running with kdump active, so in case I may also invoke the crash sysrq action and send back results.

When a crash no longer happens, kdump isn't needed.  Instead, we need
to track what triggers the stall.

Try to enable the tracepoint, as mentioned in
Documentation/sound/hd-audio/notes.rst.


thanks,

Takashi