Iso9660 unable to mount

You’re not up to date. The latest 5.15 kernel in the stable branch is currently 5.15.133-1.

Related kernel config for 5.15.133-1:

# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m
# end of CD-ROM/DVD Filesystems

Note that m means that the device will not be compiled directly into the kernel, but loaded as a module.

I don’t expect it to work either because you didn’t run it with sudo. :wink:

@Tx86 Run the following to load it manually:

sudo modprobe isofs

To load it automatically, add it to a configuration file in /etc/modules-load.d/; i.e., /etc/modules-load.d/modules.conf:

# List of modules to load at boot
isofs
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