I would like to ask you for your help. I have laptop Lenovo ThinkPad T420s and Lenovo ThinkPad Mini Dock Series 3 4337. There is no sound during docking. Out of dock there is no problem, sound works. In dock there is no sound from integrated speakers nor external as well.
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00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)
Debian Stretch 64bit Gnome
If you have any idea please let me know.
Thank you in advance.