Update & simplication. This bug affects 17.10 & 17.04 with the current LTS support nvidia drivers. This bug affects both my laptops with nvidia hardware. External monitors are not necessary to reproduce.
Reproduction is simple. 1. Activate the nvidia hardware using discrete mode. Therefore no intel graphics hardware is present. 2. Enable the nvidia driver in modeset=1 make a file /etc/modprobe.d/zz-nvidia-modeset.conf with contents options nvidia_384_drm modeset=1 3. sudo update-initramfs 4. make sure gdm3 is your display manager 5. reboot 6. attempt to start a gnome session -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1706474 Title: gdm3 nvidia modeset=1 is broken, external screens don't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1706474/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
