using amdcccle can switch the output correctly and "xrandr -q" command can find the external output device, so, I think this is a upper layer issue, not a kernel/driver issue.
** Changed in: linux (Ubuntu) Assignee: AceLan Kao (acelankao) => Anthony Wong (anthonywong) -- 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/linux/+bug/869799/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs