Comment # 1 on bug 995809 from Franck Bui

Hi Ludwig, I think this issue should be fixed by latest systemd.

More specifically, this change should fix the issue you're seeing:

  * Mon Aug 22 2016 fbui@suse.com
  - Update SLE12-SP2 branch:
    Added:
      9a785d4ef systemd: ignore lack of tty when checking whether colors should
be enabled
    Dropped:
      59617e21f pid1: reconnect to the console before being re-executed (#3842)
    Modified:
      cf23b2d5b pid1: handle console specificities/weirdness for s390 arch

You need to install a systemd containing this change and normally new updates
shouldn't show this issue anymore.