Same behaviour happens to me. The second monitor works as expected on Ubuntu 18.04.1 (upgraded up to 18.04.4 works fine) but does not works with a fresh install of 18.04.4
Asus Laptop Intel Core i7-6700HQ nvidia GeForce GTX 960M With a fresh install of Ubuntu 20.04 the second monitor keeps black and indicates "no source detected" however this is the output of xrandr command: Screen 0: minimum 8 x 8, current 1920 x 2160, maximum 16384 x 16384 eDP-1-1 connected primary 1920x1080+0+1080 (normal left inverted right x axis y axis) 344mm x 193mm 1920x1080 60.05*+ 60.01 59.97 59.96 59.93 ... ... DP-1-1 disconnected (normal left inverted right x axis y axis) HDMI-1-1 disconnected (normal left inverted right x axis y axis) HDMI-1-2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm <-- 1920x1080 60.00*+ ... ... DP-1-2 disconnected (normal left inverted right x axis y axis) HDMI-1-3 disconnected (normal left inverted right x axis y axis) Could anybody help with this issue? Thanks in advance. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1871721 Title: Second Monitor on HDMI blank screen with Nvidia & Ubuntu 20.04? (ASUS Laptop) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kernel-package/+bug/1871721/+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
