Maddeningly, I've not yet been able to reproduce this by doing
for i in `seq 1 100`; do xdotool search --name qemu keydown ctrl+alt+2 xdotool search --name qemu keyup ctrl+alt+2 xdotool search --name qemu keydown ctrl+alt+1 xdotool search --name qemu keyup ctrl+alt+1 done
Maddeningly, I've not yet been able to reproduce this by doing
for i in `seq 1 100`; do
xdotool search --name qemu keydown ctrl+alt+2
xdotool search --name qemu keyup ctrl+alt+2
xdotool search --name qemu keydown ctrl+alt+1
xdotool search --name qemu keyup ctrl+alt+1
done