A "regression in the intel driver" doesn't seem to explain why this was not an issue in a gnome session, nor to the fact that - xset dpms force off xset dpms force on returned display both in greeter & session (and nvidia driver loaded & worked fine, with or without a visible display.
you 'fixed' the issue but maybe not for the correct reason -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1507676 Title: Nvidia-Prime not switching from intel to nvidia leading to a black screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1507676/+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
