Android tablet or phone display on Linux Manjaro Laptop with SCRCPY

Thanks for your quick response. It is a good learning exercise. When I manage to get back to proper booting, I’m happy!. Will let you know.

Thanks for the [root tip] [recovery] Basic Manjaro Linux Rescue and Recovery.

I have Manjaro running live from an usb flash drive.
First backing up my $HOME data of two user accounts. Including my mail in Thunderbird. And relevant data on another partition. And all relevant configuration files around in /etc/ Preparing for a possible re-install, or other risks, trying to get things repaired.

In mentioned manual the disks and partitions are in the /dev/sda type. My pc has them in the /dev/nvme0np1X (X from 1 to 8). How to translate this ?
I cannot gamble around anymore with this relevant pc for me.

Please help me out.

I will launch another topic to continue with recovering from this boot issue, caused by playing around with envycontrol