Pedro Coca, thank you for reporting this and helping make Ubuntu better. Could you please run the following command from a terminal as it will automatically gather and attach updated debug information to this report:
apport-collect -p xorg 1500382 Please ensure you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information. When reporting bugs in the future please use apport by using 'ubuntu- bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs . ** Changed in: xorg (Ubuntu) Importance: Undecided => Low ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- 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/1500382 Title: Screen blanking out when using an external 4k monitor with the internal screen turned off in display settings. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1500382/+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