Display goes black after rotating tablet screen via hardware button

[hexa-]

My display goes blank after hitting the rotation button on my Lenovo X201 Tablet.

.xsession-errors attached, it has probably s.th. to do with
(gnome-settings-daemon:2571): color-plugin-WARNING **: failed to reset xrandr-Lenovo Group Limited gamma tables: gamma size is zero
(gnome-settings-daemon:2571): common-plugin-WARNING **: Error in setting "Wacom Pressure Threshold" for "Serial Wacom Tablet stylus"
etc.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.