To make thing even weirder, one time the external monitor went to sleep while the system was waiting for cryptfs passphrase input and the situation occured already in login screen: Could move the mouse into the black screen with login window following there, and back. I tried to restart lightdm. Still the same. I logged in, restarted lightdm: tada. Monitor back awake showing my desktop. I already tried a different cable but no success. All my other machines are working well with that monitor hosting the same setup (ubuntu/i3).
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1915382 Title: external Monitor shows »No Signal« after dpms sleep To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1915382/+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