Issue: After shutdown or reboot the Gitlab 12.5.2-ee in Ubuntu 18.04 GUI edition without attaching display(monitor), gitlab-runsvdir service will not start automatically. Due to this Gitlab application will fail to start. For this we need to start the service manually every time.
Route cause: gitlab-runsvdir service will never start if we boot the PC/Server without attaching the display (Monitor). So, to start the gitlab-runsvdir service which required display connection to the PC/Server during the boot. After booting process complete, you can detach the monitor
Please note, this issue caused with Ubuntu 18.04.2 GUI Desktop OS