Comment 23 for bug 1257352

It seems the issue is sdl related to change in sdl window size. If I started qemu and set the monitor (and serial & parallel) to the same VC size, it works much better. Instead of hangs on a 2-3 switches, it may hang after rapid switch of more than 10 times. Btw, it can hang in any windows, i.e. display, monitor or serial/parallel.

So the workaround to ease this is, something like '-monitor vc:640x480 -serial vc:640x480'.