www.makemkv.com

I'm on Linux and found out that it's problematic to change the system time back to the current time after starting MakeMKV. I get missing decryption key errors with some Blu-rays and can't load backup folders created with MakeMKV previously because of data mismatch errors, but everything works fine ...

Standard Blu-ray discs require the UDF 2.50 filesystem. Maybe your Sony player accepts other filesystems as well.

Please see my post above about how to create UDF 2.50 discs with Nero. ImgBurn with Wine can also be used.

However when I use makemkv the backup function is greyed out. Is this function not working for all disks or setups. The backup button is only available if the disc isn't opened. Run makemkv and then click the backup button without opening the disc. But it seems it was created not with large bluray ...

Create a folder backup with MakeMKV first. You can then create an image (.iso) file from the folder structure. Unfortunately, "Nero 4 for Linux" seems to be the only Linux program that supports creating UDF 2.50 filesystems, which is required for Blu-ray discs. It's an old program from 200...