Bug #1636009 expired but this here is a more detailed and targeted analysis.
Recent experiments demonstrate that the NVidia card does not get initialized on reboot at all. If powered of and turned on, it seems that the NVidia card keeps some information for some time thus reinitialization does not take place. After reinstalling the driver (after purging), the driver does not initialize the card any more. Reverting to a bare metal backup of 16.04 demonstrates that the card a) boots normally b) serves HDMI ports on both thunderbolt ports and the primary HDMI port Thus: I attribute it to the driver -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1647768 Title: NVidia card not properly initialized To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-367/+bug/1647768/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
