Public bug reported:
Long time reader, first time poster :-)
I cannot get sound from the analog headphone/microphone port on my
Lenovo ThinkPad T420. Based on Google searches I have fiddled with the
snd-hda-intel options in /etc/modprobe.d/alsa-base.conf as follows:
- Set model=thinkpad resulting in no sound through the headphone jack
and the loss of the headphone playback connector in alsamixer.
Unsurprisingly this results in no option to set or configure the analog
headphone connector in the sound settings applet and/or pavucontrol.
- Set model=generic with the same results as above.
- Set model=auto which resulted in the appearance of the headphone
connector (progress!) but I still get no sound from the headphones when
I select the connector and/or mute the speakers through alsamixer.
I also tried re-configuring the alsa-driver package to include verbose
debugging support but ran into a whole lot of hassles (some of the
source references smp_lock.h which is no more in kernel 3+, macro
conflicts with system includes, etc.) when I tried to build it with
module-assistant. I also tried to build it from the latest tarball from
the alsa project with mixed results and ultimately no joy.
Most problems of this kind I've seen tend to fall into 3 categories: (i)
fixed by changing snd-hda-intel options, (ii) fixed through some
sequence of random updates, (iii) sitting in silence. I'm hoping to be a
bit more proactive.
The output of alsa-info.sh is attached.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: alsa-driver headphones sound t420 thinkpad
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https://bugs.launchpad.net/bugs/905022
Title:
No sounds from headphones on ThinkPad T420
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