QEMU -nographic option is legacy and is kept only for compatibility. It does several things at once and not all of them are wanted. For example, it may clear screen when booting which is unwanted in most cases (but makes no difference with travis). Using -display none -serial mon:stdio ensures that the output is only added to the console.
QEMU
-nographicoption is legacy and is kept only for compatibility. It does several things at once and not all of them are wanted. For example, it may clear screen when booting which is unwanted in most cases (but makes no difference with travis). Using-display none -serial mon:stdioensures that the output is only added to the console.