Hey guys, I got this sound issue on archlinux.I have this problem for a long time and I really dont know why.
I will display my situation really carefully：
1：I have installed alsa-utils.
2: I can invoke alsamixer under tty(any user).
3: root can invoke alsamixer under a desktop environment and this super user can play sound without any pressure.
4: a normal user, however, can invoke alsamixer under tty but not under a DE, no sound output either.
the output is :
alsa cannot open mixer: no such file or directory
I have tried several desktop, wm, such as kde xfce and awesome. I got same result.
some guys say that I need to add user to audio group, but it didnt work. As arch wiki says, local user needn't added into audio group.
Can anybody help me on this? Really apreciate for your help