It looks like you triggered the screen magnifier. Try holding the Windows key and pressing +/- or =/-
Please also run this command to collect more system information: apport-collect 2077825 ** Package changed: xorg (Ubuntu) => plasma-desktop (Ubuntu) ** Changed in: plasma-desktop (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/2077825 Title: wrong screen resolution To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-desktop/+bug/2077825/+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