23.10. QEMU GUI is unresponsive
Sometimes in Ubuntu 14.04, after the QEMU SDL GUI starts, it does not get updated after keyboard strokes, and there are artifacts like disappearing text.
We have not managed to track this problem down yet, but the following workaround always works:
Ctrl-Shift-U Ctrl-C root
This started happening when we switched to building QEMU through Buildroot, and has not been observed on later Ubuntu.
Using text mode is another workaround if you don’t need GUI features.