Audio-CD not mountable

[Colin Law]

On 23 June 2013 22:48, Joep L. Blom <jlblom at neuroweave.nl> wrote:
> On 23/06/13 09:57, Nils Kassube wrote:
>>
>> Joep L. Blom wrote:
>>>
>>> Thanks for the lucid explanation. The only problem remains that in
>>> another system with the same operating system the audio CD can be
>>> mounted and opened with e.g. thunar.
>>
>>
>> Well, actually some systems have the possibility to read the audio CD
>> and show it to the user like it was mounted, but technically it isn't
>> because you really can't mount an audio-CD. But I suppose you don't care
>> about the technical details als long as it "Just Works (TM)". So let's
>> try to find out what exactly doesn't work like expected on your system.
>>
>> Now I installed xubuntu-desktop on my laptop (with 12.04) to find out
>> what happens if I start a xubuntu session and insert an audio-CD. The
>> result is that an icon labeled "Audio-CD" appears on the desktop and
>> parole media player automatically gets started to play the music of the
>> CD. If I then close the media player and double-click on the Audio-CD
>> icon, the file manager thunar opens and I can see the individual tracks
>> as wav files with fake filenames like "/Track 1.wav". Please note the
>> leading "/" which is actually not allowed in a real filename because it
>> is the directory separator. If I open a terminal and check with the
>> "mount" command, I can't see anything mounted which looks like the
>> audio-CD. The output is the same as it was before I inserted the CD.
>>
>> I can then "copy" the wav files from the Audio-CD to some place e.g. in
>> my $HOME folder and the file manager rips the selected CD tracks and
>> places real wav files on my harddisk with real filenames without "/".
>>
>> I also tried what happens with a modern "Enhanced CD" which has a data
>> section and an audio section. In this case I get two icons on the
>> desktop, one labeled "Audio-CD" and the other one labeled with the
>> artists name. This time a dialog appears where I can select to display
>> the files or to play the CD. If I select to play the CD, it starts
>> parole media player like it did with the real audio-CD. If I select to
>> show the files, it mounts the data section of the CD and opens thunar to
>> show the files but those are not wav files but some useless crap for
>> Windows. This time I can see with the mount command that the CD is
>> actually mounted and I can e.g. list the files withe the ls command.
>>
>> What I described above is what I would expect to see on a standard
>> Xubuntu machine. Please explain what is different on your machine, so we
>> can possibly determine what is wrong on your machine.
>>
>>
>> Nils
>>
> Nils,
> Thanks again for your clear description of your work with Xubuntu. That is
> an exact description of the normal happenings on an Xubuntu system.
> In my case inserting an audio CD shows the Audio-CD icon on the desktop.
> I didn't have parole therefore I downloaded it and just as you described it
> started to run the CD. But theerafter our experiences differ.
> Parole works like Banshee, while Rhythmbox eventually played the CD but
> Audacity didn't want to play the CD as that program wants to mount the CD. I
> then started thunar which showed the "Audio Disc" as an item in the left
> column but clicking on it gave an error window with:
>    "Failed to mount "Audio Disc" Location not mountable.".
> Therefore there is something in error in my system that prevents the proper
> mounting of the CD which - I can safely suppose - is in an iso9660 format.
> It may be some switch in some list that may accidentally been set wrongly by
> some un-behaving program but I don't know sufficiently of the innards of
> ubuntu (or xubuntu) to know where it is set and I don't know the actual
> subroutines that govern the loading of an audio disc.
> In the old days (DOS) I knew all subroutines controlling the I/O - as we
> wrote many routines ourselves - but that was in the 70-ties as we wrote
> RT-subroutines to read AD-converters.

Try logging on as a different user (create one if necessary).  That
will tell you whether it is something in your user settings that is
causing the problems or whether it is something more fundamental.

Colin