Comment 18 for bug 430605

reply to Baris, I find that I can only eject once, until I kill Nautilus.

anne@lazarus:~$ sudo eject /dev/dvd
[DIDN'T EJECT]
anne@lazarus:~$ lsof /dev/sr1
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
nautilus 2820 anne 28u BLK 11,1 0t0 1561 /dev/sr1
nautilus 2820 anne 30u BLK 11,1 0t0 1561 /dev/sr1
nautilus 2820 anne 33u BLK 11,1 0t0 1561 /dev/sr1
anne@lazarus:~$ pkill nautilus
anne@lazarus:~$ sudo eject /dev/dvd
[DID EJECT]
anne@lazarus:~$ lsof /dev/sr1
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
nautilus 8745 anne 28u BLK 11,1 0t0 1561 /dev/sr1

Maybe in the meantime you can just kill nautilus