Just a note, maybe someone finds the time to look at this: Sending ALT-F4 to the SDL window of qemu (stable-0.12 and master) when it was configured with --enable-io-thread and runs -smp 2 or more causes a lock-up of the qemu process.
[I currently trigger way too many bugs...] Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux