I have seen issues with Unity when the overall width of the combined screens exceeds the underlying hardware texture limit. Could you post the output of the (non-destructive) command below please (which would need running in a terminal window):
glxinfo -l | grep GL_MAX_TEXTURE_SIZE Thanks. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/747205 Title: [arrandale] Black screen on all outputs when external VGA is connected _______________________________________________ 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