I have the same problem in intrepid.
My sound card is:
04:00.0 Multimedia audio controller: Creative Labs SB Audigy LS
Ctrl+Alt+F6, Ctrl+Alt+F7 workaround does NOT works for me.
As Matt Collins says i experiment the same issue with videos. They play veeeery slow.
I don't understand that there may be relationship between sound and video.
I have the same problem in intrepid.
My sound card is:
04:00.0 Multimedia audio controller: Creative Labs SB Audigy LS
Ctrl+Alt+F6, Ctrl+Alt+F7 workaround does NOT works for me.
As Matt Collins says i experiment the same issue with videos. They play veeeery slow.
I don't understand that there may be relationship between sound and video.
If more info is needed please ask.