The output log from xrandr. log above "--------------------" is before the external display plugged, after that is after external display connected.
------------------------- If I connected the external monitor first, then boot the system. The external display is ok. If I switch to console mode(ctrl+alt+F1) then come back to x-windows. The external display is ok. ** Attachment added: "xrandr.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/869799/+attachment/2632795/+files/xrandr.log ** Changed in: gnome-settings-daemon (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/869799 Title: [Dell inspiron M5110] no output while external VGA is connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/869799/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs