(In reply to Eduard Steinbacher from comment #45) > Created attachment 854124 [details] > According comment 37 and 41 enclosed the 4 Files named according points > 3,4,7,8 Thanks! However, this looks very strange: the register dumps are identical in both working and non-working cases. So, from the hardware setup POV, both should behave same, but by some unknown reason, the output differs. Hmm. > I recognized in point 4 that the pavucontrol still showed unplugged even the > headphone on front was plugged. This might be due to the runtime PM where the codec is suspended. > To point 5: After disconnecting headphone there is still no sound on LINEOUT > plug. > pavucontrol shows LINEOUTPUT (plugged in). Likely the same problem. A kind of expected behavior. > After setting pavucontrol to headphone (unplugged) I got sound to the > amplifier again. > It's the same for point 7 and 8 Could you try the following? - Create a file /etc/modprobe.d/61-hda.conf, containing the following line: options snd-hda-intel power_save_controller=0 and reboot / retest.