Hi there, we did make an upgrade of our headless appliance (a DVD read-roboter) from CentOs 6.9 to AlmaLinux 8.8. CentOS 6.9 did fire a UDEV-notification every time the DVD-Tray did something (insert cd, read CD, eject,...) and we could react on that. AlmaLinux 8.8 now uses systemd, therefore the UDEV-notifications only happen, if the filesystem of the media is correctly identified - which does not happen if for example the media is scratched and therefore not readable. Now there is a CD inside the tray - and we do have no clue. If we use a vanilla AlmaLinux 8.8 with KDE and insert a scratched CD - after some time the CD gets ejected - and we have not found out, which service does this. Is there a possibility to get notified, when a CD is inserted - regardless of the readability. Thanks Gerhard PS: i did post this question in the german-list as well: https://lists.almalinux.org/hyperkitty/list/users-de@lists.almalinux.org/thr...