For any who are affected by this, here is a work-around. I was able to add a screen resolution that was detected for my internal monitor, but not for the external one, using xrandr --addmode. It gets the width of the screen right, but truncates the bottom. However panning makes the bottom accessible, so this is not a serious limitation.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1598993 Title: xrandr scaling corrupts external monitor output To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1598993/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
