Comment # 9 on bug 1171293 from S. B.

(In reply to Takashi Iwai from comment #7)
> Well, let's check whether applying the similar workaround to other Thinkpad
> models works for yours well.  I'm building a test kernel based on the latest
> stable branch with a test fix patch.  With this kernel, the internal mic
> boost is limited, so the overdrive should be avoided.
> 
> The package is being built in OBS home:tiwai:bsc1171293 repo.  It'll appear
> later at
>   http://download.opensuse.org/repositories/home:/tiwai:/bsc1171293/standard/
> 
> Please give it a try later.

Hi Takashi, it looks like the patch does improve things. I'll add three
screenshots so you can see how the levels look and their corresponding volume
in Audacity.