This is an old bug but still seems to be relevant on Ubuntu 16.04, unfortunately. When booting from the Windows DVD to install a Windows 7 guest, the boot process hangs on "Starting Windows." By "hang" I don't mean a total hang - the Windows logo animation still pulses in & out. CPU usage is near zero, with no I/O activity. It just never actually gets past that to let me choose how to install Windows. This was with the default QXL display. Changing to Cirrus "fixed" the problem.
This is an old bug but still seems to be relevant on Ubuntu 16.04, unfortunately. When booting from the Windows DVD to install a Windows 7 guest, the boot process hangs on "Starting Windows." By "hang" I don't mean a total hang - the Windows logo animation still pulses in & out. CPU usage is near zero, with no I/O activity. It just never actually gets past that to let me choose how to install Windows. This was with the default QXL display. Changing to Cirrus "fixed" the problem.