Sometimes, after reboot or suspend, docking station isn't fully working
Solution 1:
had the same problem.. Try this.. Will work better..
edit file (with sudo):
/etc/systemd/logind.conf
change these lines to:
HandleLidSwitchExternalPower=ignore
HoldoffTimeoutSec=120s
You can even try more than 120s but this works fine with my system. When for some reason dock goes to "sleep" (meaning screen goes blank) just touch "ESC" twice.
Good luck and Let me know.
Solution 2:
The factory reset on the bios turned off Enable Thunderbolt Boot Support. Turning that back on has resolved the problem. Special thanks to @jpbrain for getting me unstuck.