A workaround is to go to System Settings then to Screen Display. You'll see a screen labeled "Unknown Display".
Click on this and you'll see that the On/Off 'switch' below will now show On. Click it to Off and the effects of the "Unknown Screen" will go away. I have a notebook with an external 24" monitor and the effects for me were - 1. The Desktop pics was duplicated in the top LH corner of my ext monitor screen with it's own Launcher (I fixed the separate launcher by setting Launcher placement to only the ext monitor but couldn't get rid of the dupe desktop pic) 2. The mouse kept flickering -- 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/1244827 Title: [13.10] Ubuntu detects a non-existing screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1244827/+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
