Wow, this is a blast from the past. That bug was probably one or two
machines ago and I no longer have the hardware to test / reproduce it.
This can be closed.

> On Apr 17, 2018, at 10:37, Rolf Leggewie <905...@bugs.launchpad.net> wrote:
> 
> Sorry for the long delay.  Is this something that still affects Xenial
> or later?
> 
> ** Changed in: alsa-driver (Ubuntu)
>       Status: Confirmed => Incomplete
> 
> ** Changed in: alsa-driver (Ubuntu)
>     Assignee: (unassigned) => Rolf Leggewie (r0lf)
> 
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/905022
> 
> Title:
>  No sounds from headphones on ThinkPad T420
> 
> Status in alsa-driver package in Ubuntu:
>  Incomplete
> 
> Bug description:
>  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.
> 
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/905022/+subscriptions

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https://bugs.launchpad.net/bugs/905022

Title:
  No sounds from headphones on ThinkPad T420

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