[Bug 412527] 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.

[Simon]

I found a work-round for this on my Timeline 5810T - in the BIOS switch
SATA to IDE mode rather than AHCI. Everything works as expected, apart
from dual booting Win... which fails completely with no error message.
Boo Hoo, now I will have to remove it completely! (watching DVDs was the
only reason I was keeping it). If there is a fix for this I would like
to know what difference IDE / AHCI mode makes - Ubuntu doesn't seem to
care and I am not looking for blistering performance.

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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. 
https://bugs.launchpad.net/bugs/412527
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