Reproduced on Xfce 4.4 on Intrepid (I have absolutely no clue if this has been fixed in Jaunty). I have actually found out how to prevent Xfce from using the motherboard speaker, but it does not work.
Reproduced on Xfce 4.4 on Intrepid (I have absolutely no clue if this has been fixed in Jaunty). I have actually found out how to prevent Xfce from using the motherboard speaker, but it does not work.