Nils, please upgrade your kernel as per the bug description:
WORKAROUND / 'FIX' (added on March 9, 2017)
Several people have mentioned upgrading to kernel 4.8 or higher solves the
issue. As per #81, you can easily install kernel 4.8 (if you're on Ubuntu
16.04, that is) by running
sudo apt install linux-generic-hwe-16.04
If you are still experiencing this issue after upgrading to kernel 4.8,
please report back.
** Also affects: linux-lts-xenial (Ubuntu)
Importance: Undecided
Status: New
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which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1573959
Title:
On-screen text disappears after suspend
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