Some kind of similar issue on ThinkPad X250 20CM004EMN. Switching back to 4.15.0-43-generic solved the problem.
Booting with 4.15.0-44-generic on Ultra Dock station gives blank screen on login/display manager. Undocking does not solve the issue so only SysRq+REISUB or hard reboot help. X250 rejects to fall sleep on closed lid or Fn+4 combination. Tried on two different Ultra Dock stations with various monitors, the result is the same. Booting with 4.15.0-44-generic undocked brings login/display manager as expected. It is possible to dock after that. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1813672 Title: 4.15.0-44-generic #47 breaks Lenovo T470s suspend while docked To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813672/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
