Thanks beckerz #23),
eject /dev/sr0
also works for me (Ubuntu 12.04 amd64 in MacBook Pro)
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https://bugs.launchpad.net/bugs/519935
Title:
unable to eject cd-rom after burning disk
To
Dear Marco, after many trials I am not able to apply your solution. I
have a macbook pro 15'' of December 2011 (8.2? 8.3?). I feel
absolutely frustrated with the broadcom 4331. After several re-
installations of ubuntu 12.04 alpha, beta, I just got working
(miraculously) the wireless after