I have the same problem (Xubuntu 18.04.1, Dell E7470, Intel HD Graphics 520) light-locker shows password box after waking up, but upon entering correct password screen is black.
Workaround that I use: * Open text terminal/virtual console (CRTL+ALT+F1) * log in * kill light-locker ($ killall light-locker) * go to XFCE terminal (CTRL+ALT+F7) (screen is still black) * close/open laptop lid (normal XFCE with all previously opened apps now shows) optional * run light-locker again in terminal to re-enable screen locking/sleep mode ($ light-locker) (repeat if issue re-appears) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1320989 Title: black screen after longer screen lock To manage notifications about this bug go to: https://bugs.launchpad.net/elementaryos/+bug/1320989/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs