Rogan Dawes writes:
have to reboot to allow the laptop to detect the screen again. Xrandr
does
not detect the display if run manually, and the Settings app Displays page
also doesn't show the TV.
This is a rather difficult thing to google, I have had zero results in my
searching.
This seems to be a long running issue with various Nvidia cards, in my
experience. If a monitor is present and powered on at boot time everything is
fine. If the monitor gets powered off or disconnected it won't ever come
alive again, until the next reboot. This is not limited just to nvidia's
drivers. In all other respects my old geforce gtx 285 works just fine with
nouveau; this is the only defect.