I'm using Fedora 20 KDE on my Dell Inspiron N5010, and I'm having a weird problem with my audio device (HDA Intel MID, 92HD81B1X5 with ALSA PulseAudio).
The problem is that, when I'm watching a YouTube video in my browser (basically when the flash plugin is active), I'm not getting any sound from any other media player. For example VLC gives an error -
Audio output failed:
The audio device "sysdefaultARD=MID" could not be used:
Device or resource busy.
Only the sound from the browser is active.
Similarly, when I'm using a media player, I do not get any audio from YouTube.
However, I can run multiple instances of VLC, and I'm getting sound from all of them.