Great, seems we are homing in to the real problem. With the rules disabled, please boot. Now do
sudo strace -vv -s 1024 -f -o /tmp/cdrom_id.trace /lib/udev/cdrom_id --debug --export /dev/sda and copy&paste the output here and attach /var/log/kern.log and /tmp/cdrom_id.trace. Is mounting broken now? I. e. does above command trigger the problem for you? -- CD-ROMs not detected unless when booting with one inserted already https://bugs.launchpad.net/bugs/439137 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs