I've upgraded from ubuntu 17.10 to 18.04 and I got the same issue. When I boot on my laptop with a gtx 1070, I can see on my laptop screen and my monitor connected through a USB-C adapter the startup console starting all the modules. On the other hand I have the login screen working well on my external monitor (through HDMI).
It is important to notice that I cannot detect any of the two others display through the device manager or any command. I believe that the monitor connected through HDMI only is using the integrated Intel GPU while my two other screens uses the nvidia graphic card. This bug is definitively not fixed at all and it is astonishing to see that it has been marked as 'resolved' while a lot of users are still getting blocked from using their computer (personal or work...). -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1752053 Title: nvidia-390 fails to boot graphical display Status in mesa package in Ubuntu: Fix Released Status in nvidia-graphics-drivers-390 package in Ubuntu: Fix Released Status in xserver-xorg-video-nouveau package in Ubuntu: Invalid Bug description: I'm using Bionic with the new 4.15 kernel. I've been using the nvidia-384 driver with no problem for a while. Today I issued "sudo apt-get upgrade" and I was prompted to upgrade the nvidia driver to the nvidia-390. After installing the driver and rebooting, I was only able to boot in to the tty terminal. The graphical display failed to boot. I have had similar problems with nvidia driver version 390 with Arch Linux and with Open Suse Tumbleweed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1752053/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp