[alsa-devel] HD-audio regression after commit 34588709af61be1550b4e2bcee5c85d0ac4f34d4

[Miro Hodak]

> El jue, 17 ene 2013 a las 16:32 horas
> Takashi Iwai escribió:
> >
> >In anyway, only for checking the presence unsolicited events, you can
> >do without extra program.  Suppose you built your kernel with the
> >tracing support.  See "Tracepoints" option in
> >Documentation/sound/alsa/HD-Audio.txt.
> >
> >  # echo 1 > /sys/kernel/debug/tracing/events/hda/hda_unsol_event/enable
> >
> >  (plug and unplug your headphone jacks)
> >
> >  # cat /sys/kernel/debug/tracing/trace
> >
> >If you see some hda_unsol_event lines there, it implies that the jack
> >detection basically works in hardware level.
> >
> >
> >Takashi
>
>
> My test:

HP Independent disabled, Auto-Mute enabled. When plugging front headphones,
sound is in both devices. Yet tracing shows that  jack detection is being
picked up (one plug and unplug event):

miro2 miro # cat /sys/kernel/debug/tracing/trace
# tracer: nop
#
# entries-in-buffer/entries-written: 2/2   #P:8
#
#                              _-----=> irqs-off
#                             / _----=> need-resched
#                            | / _---=> hardirq/softirq
#                            || / _--=> preempt-depth
#                            ||| /     delay
#           TASK-PID   CPU#  ||||    TIMESTAMP  FUNCTION
#              | |       |   ||||       |         |
          <idle>-0     [000] d.h.   339.442694: hda_unsol_event: [0]
res=4000000, res_ex=10
          <idle>-0     [000] d.h.   345.727502: hda_unsol_event: [0]
res=4000000, res_ex=10


So, somehow auto-muting appears non-functional ...