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-   -   Slack 14 Problem (http://www.linuxquestions.org/questions/slackware-14/slack-14-problem-4175450694/)

Ranamon 02-18-2013 04:18 PM

Slack 14 Problem
 
I have an external CD/DVD writer since this is a used HP machine that was an office workstation, and the management didn't include a reader/writer.

I had no problems with Slack 13.37 at all. Plug it in, and cdrecord found it every time. This time, "cdrecord -scanbus" returns this:

"No such file or directory. Can not open /dev/pg+
Can not open or use SCSI driver"

I have had no luck finding out what's wrong here. Tried "modprobe sg", but all cdrecord returns is the internal CD/DVD drive (the one that doesn't write).

I have had no trouble with an external HD that also uses the USB, but it won't recognize the writer.

Woodsman 02-18-2013 04:59 PM

I ran into this same problem yesterday. The solution is to modprobe the sg kernel module:

https://www.linuxquestions.org/quest...6/#post4877992

Edit the rc.modules script you are using and uncomment the appropriate line. :)

Ranamon 02-18-2013 05:19 PM

^
|

Unforch, it isn't the solution. I saw that post before opening a new thread, tried it, and cdrecord still can't find that external CD/DVD writer. All it finds after doing that modprobe is the internal CD/DVD reader, not the external one connected to the USB port.

I'm about to the point of reinstalling Slack 13.37 and saying t'hellwiddit

volkerdi 02-18-2013 05:44 PM

I have no problem here using dev=/dev/sr0. Does that work?

Ranamon 02-18-2013 06:18 PM

Quote:

Originally Posted by volkerdi (Post 4894672)
I have no problem here using dev=/dev/sr0. Does that work?

No, just seems to detect the internal CD/DVD drive.

Woodsman 02-18-2013 07:10 PM

Quote:

No, just seems to detect the internal CD/DVD drive.
What does lsscsi and lsusb show?

Ranamon 02-18-2013 07:54 PM

Quote:

Originally Posted by Woodsman (Post 4894709)
What does lsscsi and lsusb show?

Before connecting it:

[0:0:0:0] disk ATA ST3808110AS 3.AH /dev/sda (the main HD)
[1:0:0:0] cd/dvd TSSTCorp DVD-ROM TS-H353A BA08 /dev/sr0 (Internal CD/DVD reader)

For whatever reason now cdrecord recognizes the external after connecting it right after running lsscsi. It wasn't doing that before.

Gremlins, I guess.

Woodsman 02-18-2013 08:43 PM

Quote:

Gremlins, I guess.
Does the problem reappear after a reboot/shutdown?

Ranamon 02-19-2013 07:56 PM

Quote:

Originally Posted by Woodsman (Post 4894749)
Does the problem reappear after a reboot/shutdown?

Yes, it certainly did. After shutting down and restarting the next day, the problem returned. This time, "modprobe sg" did nothing, and "lsscsi" or "lsusb" returned nothing about the device. When it did work with cdrecord, it was: dev=7,0,0. This time, there is nothing reported back about any activity on Bus 7, and that command fails with cdrecord.

No idea as to why it would work once, then fail again repeatedly.

Woodsman 02-19-2013 08:07 PM

This is a USB device? I would ignore cdrecord for the moment and focus on why lsusb is not displaying the device. First check the obvious things like the device has power, the cable is good, the USB connector is good, etc.

Ranamon 02-19-2013 11:44 PM

Quote:

Originally Posted by Woodsman (Post 4895557)
This is a USB device? I would ignore cdrecord for the moment and focus on why lsusb is not displaying the device. First check the obvious things like the device has power, the cable is good, the USB connector is good, etc.

No need for that, this is a brand new device. There is something fuxxored about that new kernel. I give up. I dug out my Slack-12 install CDs, and blew Slack-14 away. Under this version, I plug the DVD writer in and it is recognized instantly, and KDE offers to start up its CD burning app. Will replace with Slack-13.37 when the iso download completes.

Maybe later when they fix that 3.0+ kernel.


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