[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.

Sun Apr 4 21:47:59 UTC 2010

Switching the SATA mode in the BIOS set-up on my ACER has resolved my
similar issue.  Quite why I have no idea especially as I have never
changed the setting previously and up until lunch time today my laptop
was recognising blank media.  That said all is working fine now so I
cannot complain too much!

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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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