The option is unfortunately a little too hidden... You need to click on your username on the login screen and then use the icon/menu in the bottom right corner of the screen before entering your password.
-- 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/1893601 Title: [i915] 4K modes are missing when connected by HDMI (but are shown in the EDID) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1893601/+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