Confirmed same issue on Thinkpad T480 with docking station. One external monitor over HDMI 1440p @ 60Hz. Issue also occurs occasionally upon resuming from suspend with no external monitors attached. Occurs every time with monitor attached on boot, resume, screen lock, or display sleep.
Confirmed same issue on Thinkpad T480 with docking station. One external monitor over HDMI 1440p @ 60Hz. Issue also occurs occasionally upon resuming from suspend with no external monitors attached. Occurs every time with monitor attached on boot, resume, screen lock, or display sleep.