I also have this problem on my ThinkPad T470p with Pro Dock 40A1. When I power on my laptop with connected dock, it's fine. I can log in and work smoothly. The problem occurs when I lock my screen. Computer freeze and I can do nothing. Only reset is a solution.
I attached logs before a reset. ** Attachment added: "kernel_null_pointer.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813663/+attachment/5234143/+files/kernel_null_pointer.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1813663 Title: External monitors does not work anymore 4.15.0-44 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813663/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
