Thanks. This appears likely to be the problem; the Nvidia driver can't find a monitor!?
Dec 17 15:07:44 shahar-desktop /usr/lib/gdm3/gdm-x-session[2137]: (II) NVIDIA(0): Validated MetaModes: Dec 17 15:07:44 shahar-desktop /usr/lib/gdm3/gdm-x-session[2137]: (II) NVIDIA(0): "NULL" Dec 17 15:07:44 shahar-desktop /usr/lib/gdm3/gdm-x-session[2137]: (II) NVIDIA(0): Virtual screen size determined to be 640 x 480 Dec 17 15:07:44 shahar-desktop /usr/lib/gdm3/gdm-x-session[2137]: (WW) NVIDIA(0): Unable to get display device for DPI computation. ... Dec 17 15:07:44 shahar-desktop /usr/lib/gdm3/gdm-x-session[2137]: (II) NVIDIA(0): Setting mode "NULL" ** No longer affects: gdm3 (Ubuntu) ** Changed in: nvidia-graphics-drivers-435 (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1856507 Title: [nvidia] Login screen doesn't show up after installing the Nvidia driver, on a desktop with only an Nvidia GPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-435/+bug/1856507/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs