I'm not quite sure this is the right forum, please redirect me if I'm in the wrong place.

I have a strange problem with the CD drive; it works fine when I don't start the desktop (KDE 4.4.5), but when I do, it refuses to open no matter what I do. I can't open it by pressing the button on the front, and it doesn't open when I use a command (like 'eject'). It isn't because there is any CD in the drive either.

But I do know that there is some sort of service that watches over the CD drive and wants to start playing music as soon as one puts a music CD in the drive; so my theory is that this service causes the trouble. I assume it is possible to stop it ogling - but what is the service called, and where do I disable it? I don't actually want this automatic functionality anyway, I prefer to manually mount USBs etc.

This is unusual... only way for this behaviour to occur is if the CD drive becomes locked - and that should only happen when it is burning a disc (in which case the burning software will lock it), or if a disc has been mounted (the kernel file system drivers lock it). Nothing in KDE itself should cause the drive to become locked.

If you invoke UDisks manually (run "udisks --dump" in a terminal) does this cause the drive to become locked? Also does the drive lock persist after you logout (and only seems to be resolved by rebooting)?