Re: [gentoo-user] Re: udev: lost dvd

[Richard Fish <bigfish@asmallpond.org>]

On 11/17/05, James <wireless@tampabay.rr.com> wrote:
> Richard Fish <bigfish <at> asmallpond.org> writes:
>
> > Does /dev/hdc exist?  If so, what are the permissions there?  What
> > about /dev/cdrom?
> Initially:
> brw-rw----  1 cdrom 22, 0 Nov 17 16:41 /dev/hdc
> so I change it to 777
> brwxrwxrwx  1 cdrom 22, 0 Nov 17 16:41 /dev/hdc
> but that did not fix it.
> ls -alg /dev/cdrom
> lrwxrwxrwx  1 root root 3 Nov 17 16:41 /dev/cdrom -> hdc

Rather than changing the permissions, a better plan is to add any
users that should be able to access cdrom/dvd devices to the cdrom
group.

>
> > What does "/sbin/cdrom_id /dev/hdc" report?
> ID_CDROM=1
> ID_CDROM_MRW=1
> ID_CDROM_MRW_W=1
> ID_CDROM_RAM=1
>

Ok, this is why you have no /dev/dvd device.  A DVD reader should also
report ID_CDROM_DVD=1, and a burner will report ID_CDROM_DVD_R=1.

The /sbin/cdrom_id program is a part of udev, and is used by udev to
determine what symlinks to create.  So as I see it, you have two
choices:

1. Try upgrading to a more recent version of udev.  The current ~x86
version is 073.

2. Write a custom rule for your device, and add it to
/etc/udev/rules.d/10-local.rules.  Something like this should do the
trick:

KERNEL=="hdc", NAME="%k", GROUP="cdrom", ACTION=="add",
SYMLINK+="_dvd%e", IMPORT="/sbin/cdrom_id --export $tempnode"

> Hum, /var/log/messages does not exist. Lots of specific log files
> are in /var/log
>
> Which startup script do I edit to start logging to /var/log/messages?

Actually, it depends upon what logger you have merged....I use
syslog-ng, configured so that my kernel and other logs go to
/var/log/messages.  Your messages may go somewhere else...

-Richard

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