I'm having the same issue on a Dell Latitude 5289 laptop connected to a dell USB-C dock with 2 external monitors, and USB keyboard and mouse (Razer Naga Chroma).
My computer will immediately lock up upon pressing Super + L to lock the screen when it's connected to the dock. When disconnected from the dock, it wakes up fine. This is isolated to 4.15.0-44 for me as well. I am unable to replicate in 4.15.0-43. Related issues: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813956 https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1813738 https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1813902 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1813738 Title: laptop doesnt wake up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1813738/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
