I fixed my problem on Dell laptop by changing Screensaver (XScreenSaver 5.34) settings. Display Modes Mode: Blank Screen Only or Disable Screen Saver
I guess the screen saver program was not working well. I glimpsed the monitor had weird colors. Laptop Lid is closed: both Switch off display and Lock screen work after the change. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/49521 Title: Screen locks up black on laptop lid close. Status in xorg package in Ubuntu: Expired Bug description: Binary package hint: acpi On my Dell 640C laptop, my screen locks up black whenever I close the lid. Doesn't matter if I have it set to sleep/suspend, blank screen, or just no event. Whenever I close the lid, it locks up black and nothing short of restarting Gnome or rebooting can get my screen back. Thanks for any fixes/suggestions. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/49521/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
