Comment 7 for bug 223534

Same thing happened for me in upgrade to 9.10, so I did the following:

sudo mv /etc/udev/rules.d/70-persistent-cd.rules /etc/udev/rules.d/70-persistent-cd.rules.disable

Rebooted machine

And now I can see the following links under /dev

/dev/cdrom
/dev/cdrw
...
/dev/dvd
/dev/dvdrw

All pointing to the correct sr0 device.

Thanks!