Thanks for the explanation! Downgrading makemkv-bin to 1.17.6 (keeping makemkv-oss at 1.18.4) fixed it completely.
I captured full SCSI logging (scsi_logging_level -s --all 7 + dmesg) around the hang. Here's the key finding:
Last commands issued by makemkvcon via /dev/sg0 before it goes silent ...
Search found 2 matches
- Mon Sep 07, 2026 9:16 pm
- Forum: MakeMKV for Linux
- Topic: makemkvcon hangs indefinitely during drive capability auto-detection ("SDF auto") with disc loaded via USB Blu-ray enclo
- Replies: 3
- Views: 182
- Sun Sep 06, 2026 1:38 pm
- Forum: MakeMKV for Linux
- Topic: makemkvcon hangs indefinitely during drive capability auto-detection ("SDF auto") with disc loaded via USB Blu-ray enclo
- Replies: 3
- Views: 182
makemkvcon hangs indefinitely during drive capability auto-detection ("SDF auto") with disc loaded via USB Blu-ray enclo
System:
- Debian 13 (trixie), kernel 6.12.107+deb13-amd64
- MakeMKV 1.18.4, built from source (makemkv-oss + makemkv-bin), GUI (Qt5) + makemkvcon
Drive: ASUS BW-16D1HT, firmware 3.11
Enclosure: OWC Mercury Pro Optical (USB bridge, VID:PID 1e91:de2c)
Symptom:
`makemkvcon -r info disc:0` hangs ...
- Debian 13 (trixie), kernel 6.12.107+deb13-amd64
- MakeMKV 1.18.4, built from source (makemkv-oss + makemkv-bin), GUI (Qt5) + makemkvcon
Drive: ASUS BW-16D1HT, firmware 3.11
Enclosure: OWC Mercury Pro Optical (USB bridge, VID:PID 1e91:de2c)
Symptom:
`makemkvcon -r info disc:0` hangs ...