I don't know much about Linux, just installed Xubuntu 18.04 a month ago. I have no system sound, (except some from Thunderbird), I can play CD's, so nothing is muted. PC=HP desktop (10 y old) Sound=Intel NM10/ICH7, Driver=SND HDA Intel I have read all answers I have found here on askubuntu regarding sound problems, tried to do many things but nothing has worked so far. Could someone help me please?? Thank you!