Hi, It looks like it's a udev configuration thing, as we have CDROM support builtin the kernel (sr_mod), and the eudev of Void Linux, which is at the same version as ours, report this when attaching a media to a virtual CDROM in virt-manager:
--8<---------------cut here---------------start------------->8--- $ udevadm monitor monitor will print the received events for: UDEV - the event which udev sends out after rule processing KERNEL - the kernel uevent KERNEL[2401.365251] change /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sr0 (block) KERNEL[2401.450065] change /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sr0 (block) UDEV [2401.527639] change /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sr0 (block) UDEV [2401.567290] change /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sr0 (block) KERNEL[2401.786096] change /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sr0 (block) UDEV [2401.824286] change /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sr0 (block) --8<---------------cut here---------------end--------------->8--- While on Guix System the same is quiet: --8<---------------cut here---------------start------------->8--- $ udevadm monitor monitor will print the received events for: UDEV - the event which udev sends out after rule processing KERNEL - the kernel uevent --8<---------------cut here---------------end--------------->8--- Fedora has these udev rules: --8<---------------cut here---------------start------------->8--- $ sudo grep -irl -E '(cdrom|optic|dvd)' /usr/lib/udev/rules.d | sort [sudo] password for user: /usr/lib/udev/rules.d/50-udev-default.rules /usr/lib/udev/rules.d/60-cdrom_id.rules /usr/lib/udev/rules.d/60-persistent-storage.rules /usr/lib/udev/rules.d/70-uaccess.rules /usr/lib/udev/rules.d/80-pktsetup.rules /usr/lib/udev/rules.d/80-udisks2.rules --8<---------------cut here---------------end--------------->8--- While Void Linux (where it works) has the sames except for 80-pktsetup.rules, which is missing. On Guix System we have these: --8<---------------cut here---------------start------------->8--- $ grep -iRl -E '(cdrom|optic|dvd)' /etc/udev/rules.d/ | sort /etc/udev/rules.d/50-udev-default.rules /etc/udev/rules.d/60-cdrom_id.rules /etc/udev/rules.d/60-libsane.rules /etc/udev/rules.d/60-persistent-storage.rules /etc/udev/rules.d/70-uaccess.rules /etc/udev/rules.d/80-udisks2.rules --8<---------------cut here---------------end--------------->8--- 60-libsane sticks out as something only we have; perhaps it 'eats' the kernel event for itself and means udisks2.rules doesn't get to see it. To be continued. -- Thanks, Maxim
