Comment 6 for bug 412527

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Scmb (seamus) wrote : Re: Cannot mount media in DVD rom drive, Acer Timeline 4810T. Drive is detected, and media only detected if placed in the drive when machine suspended. Even then DVD movies (purchased) are not recognised - error message that media is unknown. Audio cd's sometimes play. When trying to unmount, I am asked for my password - message given that another user mounted the media.

Couple of things:
1) Inability to play DVDs might mean you don't have the codecs installed? (See http://www.medibuntu.org/ for help with that)
2) The 'eject cdrom' in terminal fix seems to work. Weirdly right clicking on the CDROM icon and clicking eject drive gives you the same error message as clicking mount drive. That shouldn't be, surely?