Unable to login after changing display scale.

[stevef]

Sorry, I don't know much about xrandr really.  I was thinking the display settings are in a hidden xml file in the home directory.

At the terminal try this command.

Code:

xfconf-query -c displays -l -v

The X & Y scale factors should be 1.000000 -  If the values you see are 1.4 you may try carefully hand editing this file

~./config/xfce/xfconf/xfce-perchannel-xml/displays.xml

Otherwise, if you have an earlier backup of your home directory (using deja-dup maybe), boot from live media and try to revert that file.