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Old 09-05-2009, 11:29 AM   #1
Registered: Aug 2004
Location: South Dakota
Distribution: ubuntu & PCLOS
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Unhappy OS can't see optical drive after update

I am running Ubuntu Jaunty Jackalope and after the last update the OS can't see the optical drive. I checked to see if the sg module was running and I got this message; FATAL:module sg not found.

I checked to make sure that the motherboard could see the optical drive by booting to a live cd and it worked just fine, so the motherboard sees it.

I also tried;
find /lib -iname "*sg*"

I tried booting into the old kernel and that didn't help either.

I haven't a clue as to how to fix the problem.

Old 10-01-2009, 06:29 PM   #2
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Ubuntu has too many bugs, especially Jackalope. report a bug on their site and hope they will fix it. If I remembered corectly, Ubuntu has ~11.000 open bugs.
Old 10-02-2009, 07:16 PM   #3
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I had a similar problem with a Redhat machine. Try the following command from a Shell prompt:

modprobe sg

If your optical drive is detected by the sg module, then the /dev/sg* device files should now appear:

ls /dev/sg*

Redhat has a file called rc.local which is in the /etc/rc.d directory. On bootup, it executes the commands in this file. If Ubuntu has the same file (I haven't played with this flavor of Linux in a long while), then try adding the above line to the end of it. Now any time that you reboot your machine, the /dev/sg* devices should automatically get created.

Let me know if this fixes the problem for you.


Last edited by shahkent; 10-02-2009 at 07:18 PM.


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