Bug#788400: result for "for i in /sys/class/drm/*/status; do echo $i; cat $i; done"

[Yaroslav Molochko]

When I do first boot, the requested command output looks like:
=====
for i in /sys/class/drm/*/status; do echo $i; cat $i; done
/sys/class/drm/card0-DP-1/status
disconnected
/sys/class/drm/card0-DP-2/status
disconnected
/sys/class/drm/card0-eDP-1/status
connected
/sys/class/drm/card0-HDMI-A-1/status
disconnected
/sys/class/drm/card0-HDMI-A-2/status
disconnected
======

now when I've got restored my state from suspend, I can see that the
status is different:
=======
 for i in /sys/class/drm/*/status; do echo $i; cat $i; done
/sys/class/drm/card0-DP-1/status
unknown
/sys/class/drm/card0-DP-2/status
unknown
/sys/class/drm/card0-eDP-1/status
unknown
/sys/class/drm/card0-HDMI-A-1/status
unknown
/sys/class/drm/card0-HDMI-A-2/status
unknown
========

is there anything I can do more to debug the problem - just let me know!