www.makemkv.com

Well, my question was not about unofficial fw. It seems unbelievable that there was no fw upgrade available since this device was made, back in 2017.
So, I must now find why this device fails reading blu-rays that my other device, a LG HL-DT-ST BD-RE BH16NS40 on my windows machine reads flawlessly ...

I did not focus on what he flashed his drive with, but on the syntax itself.
However, back to the problem. As makemkvcon invoques sdftool, after examining its built-in help, I could succeed using this syntax : jean-luc@E-557:~$ makemkvcon f -d /dev/sr0 dump auto -o ./


Command produced 1 file(s ...

Indeed, I might have added that whatever I append to ./, or even I type instead of ./, leads to an invalid path message.
I did not invent this, I found this tip here.

Hello,
Owner of a Pioneer BDR-UD03FAL slim unit, and rediscovering MakeMKV since a couple of days.
Before I can get ahold of a most recent version of the fw - currently 1.03 -, I wanted to dump the current one.
I am running Ubuntu 22.04 on a Fuji Lifebook E557 (which this unit is embedded in) and ...