This sounds crazy, but this seems to happen much more frequently when I have, or am interacting with, a terminal or emacs in the second/external screen. The resolution of the display is huge, so these windows tend to be a small fraction of the display.
Also, I think it's actually only the external screen which is going black. However, it started very clearly right when I upgraded. -- 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/1658497 Title: Screens all flash to black for ~1 s periodically under extended desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1658497/+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