Not sure why you had to reinstall, nor how you ended up with a 5 partitions MBR table … since it only can have 4 … i would suggest to do a backup of your data from whatever partition you keep them and start fresh with creating GPT partition table and then move to install the way you want it partitioned …
The primary partition can be only four but extended can me more.
I don’t want to erase these partitions. This partitions table was working before, why now is not?
With MBR you do not need a separate /boot partition because GRUB is written on the MBR section of your disk then load it’s further configuration files from /boot that can be in / aka root partition … Or you also want to encrypt?
It was working everything till last manjaro update. Now It gives segmentation faults for applications so I’m reinstalling the whole system because It was so annoying. And I’ve ended in partitions part during the installation. Like I sad before, this partition table was working before.
I’ve created more than one parition to these like situations - for reinstalling the whole system and shouldn’t to back up 300 GB of data.
But the previous installation was also old manajaro (more or less 3 years ago) and everything was fine (with Calamares I think). Now I can’t do the same with the same partitions?
Did you boot the installer with proprietary drivers or free, did you enabled autologin by chance?
Your Nvidia GPU will work with proprietary drivers, but in most cases Gnome requires you to enable early kms