I've got it working one more time. * Disconnected the HDMI. * Rebooted - with USB-C to the monitor connected. * The external monitor did not register.
In addition to the monitor a Lenovo network adapter (8P8C for CAT5/CAT6/..) is connected. I tailed /var/log/syslog and /var/log/kern.log I kept disconnecting / reconnecting the monitor, and _nothing_ registered in the logs. Then I disconnected the network adapter USB-C. Followed by disconnecting the monitor USB-C again. Then reconnected the monitor USB-C and nothing. I then kept the network adapter out, and turned off the power for the monitor - while connected to USB-C. Then when I turned on the monitor power again the logs _finally_ registered the monitor, and it came to life. I'll repeat that when connecting the same monitor with HDMI it consistently came to life. But 1) USB-C connection should work the same, and 2) I'm usually connecting a second external monitor on HDMI. I'll try to lock the screen / unlock, reboot, let it suspend, etc, and see what happens next. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1973145 Title: External monitor does not connect on USB-C To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-510/+bug/1973145/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
