Read one DVD, then none work

[MR ZenWiz]

On Mon, May 4, 2015 at 9:51 PM, Tony Baechler - BATS
<bats at batsupport.com> wrote:
>
> Hi,
>
> What do you get if you do this after you give the DVD about 30 seconds to
> spin up?
>
> dmesg|tail
>
It shows the messages for the last DVD that actually mounted.  Says
there are four invalid keys on the DVD...

> Also, what if you try this:
>
> eject /dev/cdrom
>
The disks eject.  (Well, I had to use eject /dev/sr0 and /dev/sr1, but
they both come out.)

> Finally, I'm sure this is obvious, but are you unmounting the DVD first?
> Also, you say you have both a DVD writer and BD reader.  Does the writer
> read more than one DVD?  Have you checked /etc/udev/rules.d just in case?
>
No.  However they do not show as mounted, either.

I'm trying again now that I've ejected them.

That seemed to work.  At least I can read the Blu-ray drive again.

I'll see what happens when I try the DVD drive - hopefully it will be that easy.

Many thanks!