I'm running Ubuntu 18.04.1 LTS Desktop.
I'm connecting to the desktop via remote SSH session.
I'm trying to get the current resolution for the currently active local session.
I found these seemingly relevant questions:
xdpyinfo returns the following error:
xdpyinfo: unable to open display "".
xrandr returns a similar error:
Can't open display
I'm assuming this is because there is no display connected to my remote SSH session. I've tried switching (
su) to the same user as the local session, but the error is the same - I assume for the same reason: no display related to that SSH session.
So, I tried the suggestions from my third link above.
$ export DISPLAY=:0 $ xdpyinfo No protocol specified xdpyinfo: unable to open display ":0"
$ xrandr --display :0 No protocol specified Can't open display :0
How can I poll the display on the active local session for resolution (dimension) info from a remote SSH session?