[alsa-devel] hda-jack-sense-test (was: Sound issues with ALC269VB-based hardware)
david.henningsson at canonical.com
Tue Jul 17 17:20:27 CEST 2012
On 07/17/2012 05:05 PM, Takashi Iwai wrote:
> Usually the device has a jack detection mechanism, and you can check
> it via hda-verb or whatever. Plug your headphone to the headphone
> jack, and check any of the pin reacts to GET_PIN_SENSE verb (call it
> after setting SET_PIN_SENSE verb). For example,
> % hda-verb /dev/snd/hwC0D0 0x21 SET_PIN_SENSE 1
How many codecs really require SET_PIN_SENSE? I have never had a problem
with omitting the SET_PIN_SENSE command.
> % hda-verb /dev/snd/hwC0D0 0x21 GET_PIN_SENSE 0
> Check the value returned from GET_PIN_SENSE. If bit 31 (0x80000000)
> is set, this is likely the pin of the interest.
> Check this for all pins, i.e. between 0x12 and 0x21. Some nodes are
> no pins, but it doesn't matter much.
Btw, I made convenience script for doing this a year ago. Here it is again.
To install, you put it right next to the hda-analyzer py files, as it
makes use of hda_codec.py from hda-analyzer, then run "sudo
hda-jack-sense-test.py -a" (see -h for switches to set codec and card
Let me know if you're interested in having this small script in ALSA
upstream, and if so, what I should do to get it in there.
David Henningsson, Canonical Ltd.
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