And if it still happens, one last fix, which is actually I dont think it is really a fix. It is to explicitly turn off monitor when shutdown and turn on monitor when power up. Some say that asus monitor may take long time from waking up and result in this issue and so far, I never turn off my asus monitor. But turning on and off monitor each time seems too much im comparison to just keeping it always on and when this issue occurs, simply reboot.