CD-RW problems on ThinkPad X23

[Kevin Oberman]

> Date: Fri, 23 May 2003 10:00:03 -0400
> From: Jesse Sheidlower <jester at panix.com>
> 
> On Thu, May 22, 2003 at 04:25:23PM -0700, Kevin Oberman wrote:
> >
> > > From: Jesse Sheidlower <jester at panix.com>
> > >
> 
> [...]
> 
> > > Now that I've done so, I find that I can't really do much. If I try
> > > to put in an audio CD, with the GUI CD Player app, I get the message,
> > > "Error accessing cdrom device. Please check to make sure cdrom drive
> > > support is compiled into the kernel, and that you have permission to
> > > access the device. Reason: no such file or directory." Using 
> > > cdcontrol on the command line, I get:
> 
> [...]
> 
> > > Any suggestions for where I should start to poke? I haven't found
> > > anything too helpful online.
> > 
> > The most obvious is permissions. Are you doing this as root or as a user?
> > If you ae running as root, do "ls -l /dev/acd*". What are the major and
> > minor modes? acd0a and acd0c should both should be 117 0. If they ae not,
> > delete them and "cd /dev;MAKEDEV acd0"
> 
> I had been running as root to avoid any permissions problems. In any
> case, acd0a was 117 0, and acd0c was 117 2; this persisted even after
> I remade them. 
> 
> However, it occurred to me that I should then try using acd0a instead of
> the default acd0c, and it worked perfectly. A few minutes of playing around
> and I had permissions properly set up, the defaults in TCD set, and a
> CD-R merrily burning away.

Glad it's working, but the fact that MAKEDEV made the device with the
wrong minor mode indicates that your MAKEDEV is not up to date with the
rest of your system. When the ata drivers were massively updated, the
minor mode changed and MAKEDEV was updated to make the devices correctly
for the new driver. You seem to have the old MAKEDEV.

Did you run mergemaster after installing the new system? There may well
be other problems that are just waiting to annoy you if you have not.

R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634