Thanks for the bug report. This is a common problem and is almost always due to a bad connection or low quality cable. Please try unplugging and replugging the cable at both ends. If that doesn't solve it then please try a different cable. For better performance and reliability on a Lenovo G50-70, I would recommend using the HDMI port instead of VGA.
** Package changed: xorg (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Status: New => Incomplete -- 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/2057467 Title: my external monitor screen keeps going blank intermittently To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2057467/+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