Experienced this problem on a Lenovo Y530 and an Acer Aspire 8943G-9319 after upgrade to 14.04. I am using XFCE flavor of Xubuntu on both. To resolve this problem I disabled Light Locker on both and let XFCE lockscreen take care of the screen locking tasks.
No more black screen after opening lid and logging in. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1283938 Title: Ubuntu 14.04 blank screen after wakeup from sleep To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1283938/+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