The reason it works in the LiveCD is probably because you're using a different driver there (the open source 'nouveau' driver). So a solution here might just be to uninstall the nvidia-440 driver.
** Summary changed: - Display Interfaces Not Detected + [nvidia][Lenovo P51] Mini-DP and HDMI ports are missing -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875892 Title: [nvidia][Lenovo P51] Mini-DP and HDMI ports are missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-440/+bug/1875892/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
