Most of the time boots to black screen (continued)

After a few days of normal work after what I did according to the topic for this problem, without any significant change in system, again PC hangs during boot and stops here:

After several tries and final successful boot, I checked journalctl for any traces of failure during last unsuccessful boots and there was nothing related to those boots.
I know that it will happen again, so can anyone help me to find the reason and to solve it?
I’ve access the system by chroot in a live session.

A post was merged into an existing topic: Most of the time boots to black screen