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Groups > comp.os.linux.hardware > #2826

Re: CD player not working quite properly

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Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> writes:

> On Mon, 29 Jun 2015 11:11:42 -0400, Haines Brown wrote:
>> I had a serious stuttering problem with a new ASUS CD drive when
>> playing an audio CD.
>
> Which program(s) do you use to play audio cd? Do you use the analog 
> output of the CD drive connected to your sound card by a cable or does  
> your software read digital data from the CD?

When I was experiencing the stuttering problem, I moved from
alsaplayer to audacious. I now discover that while audacious plays a cd,
alsaplayer no longer does. Something apparently messed up with modules.  
I had put this line into /etc/alsa-base.conf:
options snd slots=snd-virtuoso,snd-hda-intel,snd-hda-intel

I use a digital connection to the drive.

>> It was largely fixed when following a recommendation I
>> replaced it with another ASUS drive, same model.
>
> What kind of problems were fixed by replacing the drive?

Stuttering so bad a disk wouldn't play at all. 

>> However, I still have some problems: a brief quiet pause, usually toward
>> the beginning of a disk,
>
> This kind of pause might be possible to fix by setting the CD to a lower 
> speed, waiting for a CD to spin up to a higher speed might cause a pause. 
> To lower the speed you could use a command like:
>
> hdparm -E2 /dev/cdrom
>
> or
>
> eject -x2

Thanks. Never would have occurred to me. Giving it a try.

>> and the eject button stopped working (I have to
>> bring up a terminal and issue an eject command).
>
> The eject button is blocked when the CD file system is mounted. Even if 
> you did not mount it yourself by some command you might have some desktop 
> environment that mounts the CD and maybe also brings up some graphical 
> file manager. Running eject will umount the file system (if possible) and 
> if the umount was successful eject the drive.

I now can't reproduce the problem. When I hit the eject button, the
drive LED comes on and ejects the disk. This consistently failed to work
yesterday and consistently works now. Only change was that I issued the
eject -x2 command as you suggested, and I've been switching back and
forth between alsaplayer and audacious. 

I don't run a desktop environment or have a file manager. I manage files
from terminal CLI or in emacs.

>> I'd like to ask a very general question: does it make any sense to
>> replace the drive with some other brand or model in the hope these
>> problems go? Does the eject problem a driver rather than drive issue?
>
> No, replacing the drive is not going to help. Your eject issue is 
> supposed to be that way. A user pressing the eject button (maybe by 
> accident) is not supposed to be able to break any software reading data 
> from the disk. When it comes to your pause it might help to replace the 
> drive if you are able to find a drive old enough to only be 1x or maybe 
> 2x speed. Those drives were able to spin up fast enough so you didn't 
> have to wait for them.

It sounds like you are saying that pressing the eject button won't work
as long as the disk is mounted. I'm surprised the CD disk gets mounted
at all for a audio CD play, and in fact $ mount does not tell me it is
mounted during a CD play. If a mount is blocking eject, then the problem
would seem to have been that the drive was not getting unmounted at end
of play. Is this a driver function? 

I'd like to get my alsaplayer working because I prefer it to audacious,
but alsaplayer does not seem to be getting a signal to the interface
file.  

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Thread

CD player not working quite properly Haines Brown <haines@engels.histomat.net> - 2015-06-29 11:11 -0400
  Re: CD player not working quite properly Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2015-06-30 05:32 +0000
    Re: CD player not working quite properly Haines Brown <haines@engels.histomat.net> - 2015-06-30 07:59 -0400
      Re: CD player not working quite properly Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2015-06-30 19:14 +0000
        Re: CD player not working quite properly "Peter \"Shaggy\" Haywood" <phaywood@alphalink.com.au> - 2015-07-04 13:16 +1000
          Re: CD player not working quite properly Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-07-04 17:01 -0400
            Re: CD player not working quite properly Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-07-07 00:15 +0200
          Re: CD player not working quite properly "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-07-04 20:20 -0400

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