I have an interesting updated for all concerned on this post… I have had no screen freezing issues for several months now!!!
What has changed? My laptop crashed from running out of battery power, an issue that I still haven’t managed to fix. However, an incomplete update/upgrade meant the machine was not rebooting. I was not able to fix the broken installs, my linux knowledge is too shallow and I just don’t have the time to dive into this, so I decided to simply re-install. However, a fresh installation on an encrypted partition does not work and I therefore had to do a default install on an non-encrypted partition, along with a swap partition (which my previous factory-install did not have).
Since then I haven’t had a single issue with screen freeze. So could it be a due to a lack of swap partition or encrypted partition or maybe both that is at the root of this issue?