f42 x86_64 with all updates, i915 built in video

I have a problem where when I disconnect a monitor (e.g. using a KVM) and 
reconnect, the screen remains blank.

I checked the situation and running 'xrandr --listmonitors' shows the monitor 
is initially disconnected and then connected.
So Xorg thinks all is well, but I get no video (maybe an intel x11-server 
issue?).

I can switch to text (e.g. tty2) which works fine (is visible), but when 
switching back to tty1 the screen is blank.

Running 'xrandr --output HDMI1 --mode 3840x2160_24.00' revives the video. 
However it should run from a graphics session
(an xterm window on :0 on tty1 in my case).

Can I, somehow, issue this command from a text VT? For example start 'xterm' on 
tty1 (from tty2)?

TIA

--
Eyal at Home (fed...@eyal.emu.id.au)

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