Description of problem:
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. plug in a usb audio device
2. open the volume control
3. select the usb device
4. unplug the usb device
volume control uses 100% cpu
volume control switches to a different device
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Sorry, I forgot about testing this. Yes, it needs to be reopened. I can reproduce it in F10. The problem is that the control file is gone, so the poll() returns invalid for the file descriptor. The code never checks for that so it constantly loops on the poll until you pick a different device.
This is fixed with the gnome-volume-control rewrite in F11. The old code is a hopeless case I'm afraid.