I recently installed Arch on my laptop. At first there was no sound output, but that was due to the wrong audio card being set as the default. I fixed that with the /etc/asound.conf, and so far it's worked. Today I was messing around with VirtualBox. I usually have music in the background, and Vbox kept giving me an error that the sound device was busy. I noticed that I got a similar error if I tried to start the music player after I started the VM. So at this point, only one program can output to the sound card.
I tried to add something about "dmix" to my ~/.asoundrc according to what the Arch wiki suggested, but after a reboot I can still only have one program output audio.
When I open alsamixer, I noticed that there is no PCM entry. I also noticed that when I change the volume in a program, it directly changes the 'Master' volume.
My laptop is a Dell Inspiron 15r.
[anthony@newerLaptop ~]$ lspci | grep audio -i
00:03.0 Audio device: Intel Corporation Device 0a0c (rev 09)
00:1b.0 Audio device: Intel Corporation Lynx Point-LP HD Audio Controller (rev 04)
[anthony@newerLaptop ~]$ cat /etc/asound.conf
[anthony@newerLaptop ~]$ cat .asoundrc
Sorry if I didn't post something I should have, I'm lost at this point!
Thanks for helping!