[ale] Karmic failure - missing device - mknod

[Grady Harris]

My first steps were the same--upgrade, then reinstall clean--but the
third step is what I'm getting now from y'all, & thank you.

I checked with lshw & a few others, but they could not find the drive.
I'll take a look, when I get home, at what's in /etc/udev.d/rules--I
have an older machine, with 8.10 still on it, that I can use for
comparison.

The drive works fine with the livecd, so I doubt it's mechanical.

On Mon, Dec 21, 2009 at 2:32 PM, wolf at wolfhalton.info
<wolf at wolfhalton.info> wrote:
> Does it work from the live disk?
> I had a similar failure with my sound card on 9.10
> 1.  I did an upgrade over the wire, which had always worked great with
> Ubuntu before.
>    1.1 Sound fails - card is seen by the system but not seen by pulse-audio
> or any other GUI-side utility
> 2. Burned an iso of Ubuntu.
>    2.1 Bare-metal install
>    2.2 Sound failed (same apparent issue as 1.
> 3. Worked it over at the Install Fest with wiser help.
>    3.1 The issue seemed to be that the installer program was jacked up, and
> not able to set the mods right
>    3.2 There were different link numbers to the kernel modules related to
> this bit of hardware. Found with lsmod in live and installed sessions.
> 4. Installed Kubuntu (clean install)
>    4.1 The sound card was automagically available for use.
>    4.2 The modules had the same linkages as they did from a session off of
> the live disk
> What's different?  Mine was an HP dv6000 laptop.  Apparently, lots of people
> were having trouble with this model and sound.
> What doesn't work now?  My hp multimedia button-bar at the top of the
> keyboard is not rigged up in Kubuntu.  It is still limping because of that.
>
> You might be able to look at kernel modules related to the DVD drive.  Since
> the previous version worked, it would make sense that there was a similar
> issue for your situation as for mine, though it is a different kind of
> hardware.
>
> -Wolf
>
> This was something I hadn't seen for listing hardware lshw.
> http://embraceubuntu.com/2007/02/18/find-hardware-specs-details-on-your-computer/
>
>
> -----Original Message-----
> From: Grady Harris <nolan.voight at gmail.com>
> Reply-to: Atlanta Linux Enthusiasts - Yes! We run Linux! <ale at ale.org>
> To: Atlanta Linux Enthusiasts <ale at ale.org>
> Subject: [ale] Karmic failure - missing device - mknod
> Date: Mon, 21 Dec 2009 09:58:02 -0500
>
> Another newsletter from the Slow Learners Academy:
>
> I finally upgraded my Ubuntu installation to 9.10 lasty week, figuring
> enough time had passed for others to have worked out most problems.
> Not so--the thing doesn't know the machine has a DVD drive in it. Pop
> in a disk, nothing happens. Click on the cdrom icon that appears in
> Nautilus, get the message that no such device exists. Try it different
> ways, get variations on the message: "/dev/scd0 does not exist,"
> "/dev/sr0 does not exist." I check, sure enough, it doesn't exist. My
> first thought is, "Well, then, I'll make it."
>
>  I spent a long while Saturday looking on the Ubuntu forums &
> elsewhere for folks having the same problem, & there were many. Lots
> of other folks being helpful, but none of the tips worked for me. They
> all seemed to be predicated upon the device being there, & it wasn't.
> Okay, blunt object time. I made /dev/sr0 w/ touch, changed the group,
> set the permissions, created a symbolic link to /dev/scd0, & it
> worked. However, comparing it with the other files in dev, noticed it
> should be a block file.
>
> Haven't done that before. Is mknod what I should use to create the
> device file? Is there a preferred way?
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