Hello Jeroen, thank you for your hints. The first about the battery worked immediately, while the second about the sound didn't.
Il giorno mar, 30/06/2020 alle 08.17 +0200, Jeroen Diederen ha scritto: [...] > sound: > To get sound working install alsa-utils and launch alsamixer > > sudo apt install alsa-utils > alsamixer I have alsa-utils 1.2.2-1 from unstable already installed. # LANG=C alsamixer cannot open mixer: No such file or directory do I need any more module loaded? Thanks, Giuseppe