Tested with linux-4.4.0-51-generic, the kernel printed a warning in the dmesg when connecting or disconnecting an external monitor (same as the ones in the bug description), but can't see any "screen blanks".
Tested with linux-4. 4.0-51- generic, the kernel printed a warning in the dmesg when connecting or disconnecting an external monitor (same as the ones in the bug description), but can't see any "screen blanks".