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I'm using Ubuntu, Yakuake, and VMWare Server 2. I've left Yakuake with the default F12 hotkey, and it's worked perfectly for months. I recently started using VMWare Server 2 to run a couple of Ubuntu VMs, and sometimes, after starting one of those VMs and working with it, the F12 key stops working to drop down the Yakuake console.
Currently, the F12 key doesn't do anything in my browser. If I'm in Emacs I get a notification that: "<f12> is undefined", and in terminals it inputs a tilde (~). I've not been able to recover the Yakuake functionality without restarting the machine.
I've moved on from both Ubuntu 10.04 and VMWare in the last two years, but your answer looks like it would give me somewhere to go. I'll accept it unless/until someone suggests something better, or that this doesn't work. – Andrew Larned – 2012-12-18T16:37:03.740