www.makemkv.com

Good catch, it seems to be using at least an additional 5 watts, perhaps I've never used this for blurays.

I am almost sure this used to work with older MakeMKVs PIONEER_BD-RW___BDR-XS06_1.01_PFDL007080UC - disconnects and reconnects when starting to read discs. 001003:0020 DEBUG: Code 1 at D!3/rPt!1Ynu_3vQ.&=3+:B :121261704 001003:0020 DEBUG: Code 3221225486 at D!3/rPt!1Ynu_3vQ.&=3+:B :121261727...

Yes, except if I use exactly the same machine on Windows or Linux I get different behaviour. I can download from hkdata.fairuse.org fine.

1.16.4 for Windows is able to decrypt a disc that the Linux version is not.

The Linux version's .MakeMKV/_private_data.tar file doesn't contain any hkd*.bin files, where the Windows version's does.

DNS is fine, net access is enabled on both.

It's late here and I can't recall what tools I'd use, but try something that can read the discs in disc-at-once mode - even ddrescue on Linux. Then look at the images created in a hex editor - if they're all zeroes you're definitely not reading the discs in your current drive. If there's data there,...