I think it might be a general problem with Wayland (which is what gets used if you set modeset=1):
https://bugs.freedesktop.org/show_bug.cgi?id=94851 So GDM/Wayland uses the first GPU only, which is your Intel GPU, the one wired to the laptop screen. ** Bug watch added: freedesktop.org Bugzilla #94851 https://bugs.freedesktop.org/show_bug.cgi?id=94851 -- 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
