Audio CD device

[Richard E Miles]

On Thu, 3 Mar 2005 17:17:08 +1100
"Simon Slater" <sslater at cybanet.net.au> wrote:

> > On Thu, 3 Mar 2005 10:39:40 +1100
> > "Simon Slater" <sslater at cybanet.net.au> wrote:
> >
> > > > > > On Sun, 27 Feb 2005 09:48:47 +1100
> > > > > > "Simon Slater" <sslater at cybanet.net.au> wrote:
> > > > > >
> > > > > > > For audio CD's to play on FC3, I have soft linked /dev/hdc ->
> > > > > > /dev/cdrom,
> > > > > > > changed the permissions of /dev/hdc from 660 to 664 and
> > all is well.
> > > > > > > However after each boot the permissions return to 660.
> > > > > > >
> > > > > > > -Do I need a script to continually change this?
> > > > > > > -Why do the permissions revert to 660?  Is this udev??
> > > > > > >
> > > > > > > Many thanks
> > > > > > > Simon Slater
> > > > > > >
> > > > > >
> > > > > > Yes udev is changing the permissions. See
> > > > > > /etc/udev/permissions.d/50-udev.permissions. Look for cdrom.
> > > > > > You can create a local rules file 50-local.permissions in the
> > > > > > /etc/udev/permissions.d directory and set your rules there. ie:
> > > > > > cdroms/*:root:disk:0664.
> > > > > >
> > > > > > --
> > > > > > Richard E Miles
> > > > > > Federal Way WA. USA
> > > > > > registered linux user 46097
> > > > >
> > > > > I created the 50-local.permissions file as suggested, but no
> > > > joy.  I also
> > > > > substituted ...:root:... with ...:$local:... but again no
> > > > success. I could
> > > > > not see reference to the 50-local.permissions file in the man
> > > > page. Should
> > > > > the layout be the similar to 50-udev.permissions, with only
> > the relevant
> > > > > lines? Is a soft or hard link from /dev/hdc -> cdrom still
> > > > needed with this
> > > > > fix?
> > > > >
> > > > > Thanks
> > > > > Simon
> > > > >
> > > > I never had to make a link from /dev/hdc to /dev/cdrom, the
> > > > system did it. How
> > > > did you make the link? Was it ln -s /dev/hdc /dev/cdrom? Here is
> > > > how my link
> > > > looks:
> > > > [rmiles at localhost ~]$ ls -l /dev/cdrom
> > > > lrwxrwxrwx  1 root root 3 Mar  2 01:21 /dev/cdrom -> hdc
> > > >
> > > > Was your cd reader not working? On FC3 systems it is mounted
> > at /media.
> > > > What does your /etc/fstab look like? Here is mine:
> > > > # This file is edited by fstab-sync - see 'man fstab-sync' for details
> > > > LABEL=/                 /                       ext3    defaults
> > > >       1 1
> > > > LABEL=/boot             /boot                   ext3    defaults
> > > >       1 2
> > > > none                    /dev/pts                devpts
> > > > gid=5,mode=620  0 0
> > > > none                    /dev/shm                tmpfs   defaults
> > > >       0 0
> > > > none                    /proc                   proc    defaults
> > > >       0 0
> > > > none                    /sys                    sysfs   defaults
> > > >       0 0
> > > > /dev/hda3               swap                    swap    defaults
> > > >       0 0
> > > > /dev/hdc                /media/cdrecorder       auto
> > > >
> > pamconsole,exec,noauto,fscontext=system_u:object_r:removable_t,managed 0 0
> > > > /dev/fd0                /media/floppy           auto
> > > >
> > pamconsole,exec,noauto,fscontext=system_u:object_r:removable_t,managed 0 0
> > > >
> > > > --
> > > > Richard E Miles
> > > > Federal Way WA. USA
> > > > registered linux user 46097
> > > >
> > > Thanks again Richard, however my specs are analogous to yours.  Yet my
> > > system does not make the link.  The "ls -l /dev/cdrom" gives
> > File not found.
> > > I use "ln -s /dev/hdc /dev/cdrom", giving the same permissions
> > as in your
> > > reply.
> > >
> > > The CD reader is working: FC3 was installed from there; CD
> > Player runs from
> > > root (which first gave the pointer to permissions); Music Player plays
> > > tracks ripped via Sound Juicer.  Also the cable is connected
> > from drive to
> > > card.
> > >
> > > The fstab is essentially the same w.r. to /dev/hdc with the
> > exception of the
> > > fs_file being /media/cdrom.  The mount options are the same but in a
> > > different order. (I did not include the fstab output because I
> > am mailing
> > > from a windows laptop. The FC3 box does not have the modem
> > working yet.  It
> > > comes after Samba is up, after the tape drive is going, after the CD.)
> > >
> > > Pointing CD Player to /media/cdrom gives:
> > > "Error Setting Device
> > > does not point to a valic CDRom device. This may be caused by:
> > > a)CD support not present (N/A)
> > > b)You do not have the correct permissions to access the CD
> > drive (This error
> > > still given both before and after chmod 664 /dev/hdc)
> > > c)/media/cdrom is not the CD drive" (works with /dev/cdrom when
> > permissions
> > > set).
> > >
> > > I hope this points to a solution.
> > > Regards
> > > Simon.
> > >
> >
> >
> > What happens when you do a mount /dev/hdc -t iso9660 /media/cdrom?
> > --
> > Richard E Miles
> > Federal Way WA. USA
> > registered linux user 46097
> >
> Data CD's seem to automount without any problems.
> 
> The output of the mount command is:
> mount: block device /dev/hdc is write-protected, mounting read-only
> hdc: command error: status=0x51 { DriveReady SeekComplete Error }
> hdc: command error: error=0x54
> ide: failed opcode was 100
> end_request: I/O error, dev hdc, sector 64
> isofs_fill_super: bread failed, dev=hdc, iso_blknum=16, block=16
> mount: wrong fs type, bad option, bad superblock on /dev/hdc,
> 	or too many mounted file systems
> 
> Regards
> Simon
> 
Since you can play audio cd when you are root implies that it is a
permissions problem. I would check the permissions on your audio playback
software. Make sure users have permissions 755. Maybe somehow the 
permissions got messed up. Other than that I don't know what to tell you.

Maybe someone else can suggest a solution.

-- 
Richard E Miles
Federal Way WA. USA
registered linux user 46097