[alsa-devel] Realtek ACL892: audio gap ~ each 10 seconds? [SOLVED]

[Dâniel Fraga]

On Fri, 11 May 2012 15:52:49 +0200
Takashi Iwai <tiwai at suse.de> wrote:

> Could you check which unsolicited events are triggered on your
> machine?  When you build your kernel with the tracing support
> (CONFIG_TRACEPOINTS=y), you can enable the tracing via
> 
>   % echo 1 > /sys/kernel/debug/tracing/events/hda/hda_unsol_event/enable
>   .....
> 
> Check whether the events come up frequently even without
> plugging/unplugging any jacks.  Usually this shouldn't happen.  But in
> the case of problematic hardware with the auto-mute, many bogus unsol
> events are triggered.

	Takashi, I got the following:

# tracer: nop
#
# entries-in-buffer/entries-written: 12/12   #P:8
#
#                              _-----=> irqs-off
#                             / _----=> need-resched
#                            | / _---=> hardirq/softirq
#                            || / _--=> preempt-depth
#                            ||| /     delay
#           TASK-PID   CPU#  ||||    TIMESTAMP  FUNCTION
#              | |       |   ||||       |         |
          <idle>-0     [000] d.h3   449.885014: hda_unsol_event: [0] res=40000c1, res_ex=10
          <idle>-0     [000] d.h3   449.906339: hda_unsol_event: [0] res=4000041, res_ex=10
          <idle>-0     [000] d.h3   472.269431: hda_unsol_event: [0] res=40000c1, res_ex=10
          <idle>-0     [000] d.h3   472.290721: hda_unsol_event: [0] res=4000041, res_ex=10
          <idle>-0     [000] d.h3   478.262018: hda_unsol_event: [0] res=40000c1, res_ex=10
          <idle>-0     [000] d.h3   478.283319: hda_unsol_event: [0] res=4000041, res_ex=10
          <idle>-0     [000] d.h3   482.934742: hda_unsol_event: [0] res=40000c1, res_ex=10
          <idle>-0     [000] d.h3   482.956033: hda_unsol_event: [0] res=4000041, res_ex=10
          <idle>-0     [000] d.h3   584.308420: hda_unsol_event: [0] res=40000c1, res_ex=10
          <idle>-0     [000] d.h3   584.329693: hda_unsol_event: [0] res=4000041, res_ex=10
          <idle>-0     [000] d.h3   593.781622: hda_unsol_event: [0] res=40000c1, res_ex=10
          <idle>-0     [000] d.h3   593.802890: hda_unsol_event: [0] res=4000041, res_ex=10

	***

	But I couldn't notice it happening exactly during the click and
pop... When click and pop happens, nothing happens in this file... So I
don't know if it will be useful to you. 

	Anyway, I'm confortable with auto-mute off... If you need more
testing, just ask. I'll be glad to help.

	Thank you.

-- 
Linux 3.4.0-rc6: Saber-toothed Squirrel
http://www.youtube.com/DanielFragaBR