Elmar, Thanks for your help.
Your explanation really helped and I was able to perform what was written here. However, this didn't help. (I have an ACER aspire 4810TG laptop with Matshita CD/DVD player) The solution "in the BIOS switch SATA to IDE mode rather than AHCI" partially worked though. But it is very unstable (after some time, CD player won't work and I need to reboot). I consider the issue not solved. I don't really really know what to do... :-( -- 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 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
