I did what you said penalvch and booted from USB http://cdimage.ubuntu.com/daily-live/current/vivid-desktop-amd64.iso, as the bug previously was also present when booting from USB.
The bug does not exist in that ISO. However in earlier versions I fixed it by making a custom display configuration upon booting; so there seemed to be an indecision loop when connecting the monitors without any previous configurations, in 14.04. This bug does not exists in Ubuntu 15.04 (Vivid Vervet) Daily Build 24-Feb-2015 08:39 -- 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/1403228 Title: unable to connect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1403228/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
