Comment 16 for bug 1643566

> We had, however, one machine which lost video signal ~one sec after lightdm showed up. X was still
> running (since I could login blindly via lightdm). The issue disappeared after we started
> benchmarking the machine. Can't reproduce anymore.
It turns out this issue was caused by a short circuit in the display cable. So I take that back as a symptom of this bug.