@Gabriele,
Please add this ppa: ppa:hui.wang/pa-testing and install the testing alsa-ucm-conf 1.2.2-1ubuntu0.4.1+test, reboot and test.
@Gabriele,
Please add this ppa: ppa:hui. wang/pa- testing and install the testing alsa-ucm-conf 1.2.2-1ubuntu0. 4.1+test, reboot and test.