I'm not sure where this belongs as it not exactly a beginners question, but nor is it one for "power users" so here seems an appropriate place to ask.
I have a Pi set up using public/private key authentication for ssh access.
Unfortunately while adding an additional key I managed to mess up my .ssh/authorized_keys file preventing any login using ssh.
This was entirely my only stupid fault, and no real hassle as I just needed to connect up a monitor and keyboard to login and fix it.
However when I attached a monitor to the HDMI using a HDMI->DVI cable the monitor did not display anything, forcing me to turn the PI off and on again, which caused the monitor to come live and I could login.
Again, not really hassle, but it would have been better to be able to login without causing an abnormal shutdown.
So my question is, is this expected or is there a way to allow a monitor to be added once a Pi is already running?
Was the HDMI->DVI lead the problem?
Would it have worked if I'd connected a composite TV?
Is the HDMI display checked at startup, and disabled if it is not present and if so is there a way to override this?
Cheers for any advice anyone can suggest.