Hi Marc, After discussion with Chris and jk, the problem may be related with intel sandy bridge bug, many similar problems are reported before, such as below:
https://bugs.launchpad.net/hwe-chihshang/+bug/758433 You can change sata ports to avoid the problem according to chris's suggestion in dell's machine: <vanhoof> Ming: physically move the sata connection from the blue ports to the black ones Anyway, the problem can be avoided at AHCI mode if you may find options in BIOS to do it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/794642 Title: [Dell optiplex 390][SFF] Dvd drive not recognized by system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/794642/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs