It seems that this only happens to multi-session disks. When I burnt another disk (this time with no multi-session), the ID_CDROM_MEDIA_TRACK_COUNT_DATA field returns.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/911810 Title: READ TOC fail in /lib/udev/cdrom_id for data DVDs burned using K3b To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/udev/+bug/911810/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
