Issue: Optical drives not recognized in MakeMKV container on Ubuntu VM (Proxmox)

[FlorianSpanuth]

I’m running an Ubuntu VM within Proxmox, and I’ve passed two optical drives through to the VM. I’ve tested mounting the drives in the Ubuntu VM, and confirmed that they can detect and read films. Here's the output of lsscsi -g:

lsscsi -g
[0:0:0:0] disk QEMU QEMU HARDDISK 2.5+ /dev/sda /dev/sg0
[3:0:0:0] cd/dvd QEMU QEMU DVD-ROM 2.5+ /dev/sr0 /dev/sg1
[4:0:0:0] cd/dvd QEMU QEMU DVD-ROM 2.5+ /dev/sr1 /dev/sg2

I’ve tried setting up MakeMKV both with and without docker-compose, but I’m encountering issues. My docker-compose.yml looks like this:

services:
makemkv:
image: jlesage/makemkv
ports:
- "5800:5800"
volumes:
- "/srv/docker/makemkv/config:/config:rw"
- "/stv/docker/makemkv/storage:/storage:ro"
- "/mnt/Media/MakeMKV:/output:rw"
devices:
- "/dev/sr0:/dev/sr0"
- "/dev/sg1:/dev/sg1"
- "/dev/sr1:/dev/sr1"
- "/dev/sg2:/dev/sg2"
environment:
- TZ=Europe/Berlin
- DARK_MODE=1
restart: unless-stopped

I can access the MakeMKV GUI on port 5800, and the GUI shows both drives in the dropdown menu. However, no Blu-rays are detected when inserted into either drive. Sometimes, I can use the eject button on one of the drives, indicating there is some sort of connection. However, the drives still fail to recognize the discs.

Here’s what my logs show regarding the drives:

makemkv-1 | [cont-init ] 54-check-optical-drive.sh: looking for usable optical drives...
makemkv-1 | [cont-init ] 54-check-optical-drive.sh: found optical drive [/dev/sr0, /dev/sg1], group 24.
makemkv-1 | [cont-init ] 54-check-optical-drive.sh: found optical drive [/dev/sr1, /dev/sg2], group 24.
makemkv-1 | [cont-init ] 54-check-optical-drive.sh: terminated successfully.

What could be causing this issue? I’m unsure why the discs are not being recognized despite the drives being detected in the logs.
Any help would be greatly appreciated!