Linux Kernel 6.5 - MakeMKV no longer recognizes drives

[m11kvm]

I'm trying out a kernel 6.5-rc3 pre-release because it fixes a hardware compatibility issue I've had in all previous kernels. I was previously using 6.1. However with this kernel MakeMKV no longer recognizes my usb-attached blu-ray drives. The kernel recognizes them correctly, they show up as /dev/sr0 and /dev/sr1, and they still auto-mount blu-rays correctly, showing the disc title and contents. However MakeMKV prints the message "The program can't find any usable optical drives." I suppose its possible something in /proc or /sys might have changed with this new kernel. What exactly does MakeMKV do to identify usable optical drives on Linux?

Relevant section of kernel log on boot (this is the same for both 6.1 and 6.5-rc3):

Code: Select all

Aug 03 21:10:56 rigel kernel: usb 1-2.2: new high-speed USB device number 5 using xhci_hcd
Aug 03 21:10:56 rigel kernel: usb 1-2.2: New USB device found, idVendor=0451, idProduct=8142, bcdDevice= 1.00
Aug 03 21:10:56 rigel kernel: usb 1-2.2: New USB device strings: Mfr=0, Product=0, SerialNumber=1
Aug 03 21:10:56 rigel kernel: usb 1-2.2: SerialNumber: 6D0600515E1D
Aug 03 21:10:56 rigel kernel: hub 1-2.2:1.0: USB hub found
Aug 03 21:10:56 rigel kernel: hub 1-2.2:1.0: 4 ports detected
Aug 03 21:10:56 rigel kernel: usb 1-2.4: new high-speed USB device number 6 using xhci_hcd
Aug 03 21:10:56 rigel kernel: usb 1-2.4: New USB device found, idVendor=0bda, idProduct=5411, bcdDevice= 1.04
Aug 03 21:10:56 rigel kernel: usb 1-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Aug 03 21:10:56 rigel kernel: usb 1-2.4: Product: 4-Port USB 2.0 Hub
Aug 03 21:10:56 rigel kernel: usb 1-2.4: Manufacturer: Generic
Aug 03 21:10:56 rigel kernel: hub 1-2.4:1.0: USB hub found
Aug 03 21:10:56 rigel kernel: hub 1-2.4:1.0: 4 ports detected
Aug 03 21:10:56 rigel kernel: usb 1-2.2.1: new high-speed USB device number 7 using xhci_hcd
Aug 03 21:10:56 rigel kernel: scsi 2:0:0:0: CD-ROM            HL-DT-ST BD-RE  WH16NS60  1.02 PQ: 0 ANSI: 0
Aug 03 21:10:56 rigel kernel: sr 2:0:0:0: [sr0] scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 03 21:10:56 rigel kernel: cdrom: Uniform CD-ROM driver Revision: 3.20
Aug 03 21:10:56 rigel kernel: sr 2:0:0:0: Attached scsi CD-ROM sr0
Aug 03 21:10:56 rigel kernel: scsi 3:0:0:0: CD-ROM            ATAPI    iHBS312   2      PL15 PQ: 0 ANSI: 0
Aug 03 21:10:56 rigel kernel: sr 3:0:0:0: [sr1] scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 03 21:10:56 rigel kernel: sr 3:0:0:0: Attached scsi CD-ROM sr1

[m11kvm]

Updated to 6.5-rc5, and makemkv is working again. Must have been a short-lived regression in the kernel. That's what I get for trying rc's... Sorry for the confusion.