context : minipc with lubuntu used as a mediabox with different users for different purpose (kodi, amazon prime, molotov). sound is output by hdmi
problem : everything is fine until a suspend or a change of user session : appears to be a soundcard crash as beside not having sound anymore there are no more options in pulseAudio (in config tab no setting available). It is not systematic however as sometimes sound is there after a change of session so i have no idea what really triggers the crash.
Once it has crashed, it's crashed fo all session & only after reboot sound is back & set through hdmi as it should.
So how could I restart/reset the sound card without rebooting ? (i'll create a shortcut to the commands & map a key of the remote control to it)
thanks for help