Puppy Linux Discussion Forum

Chandra · Joined: 12 Apr 2012 Posts: 13

That's it. The subject pretty explains it well. I'm getting this weird failure at bootup "Recognising media device... optical input". The strange thing is that I'm having no trouble with any of the optical device, CD/DVD (I've them both) but it keeps me annoying at bootup. I don't exactly remember what configuration caused it but the last thing I do remeber is that I listed some of the modules I didn't want to load as blacklisted. I even tried reloading those modules(each of them) but I'm still getting the failed message.

Besides, google revealed that this is not a frequent problem and obvious causes is far from any changes I made to my PC. A little hint here would be highly appreciated.

Regards,
Chandra

Semme · Joined: 07 Aug 2011 Posts: 2035 Location: World_Hub

Hi Chandra- to get the best possible reply, always include Wink

the system you're running.

Chandra · Joined: 12 Apr 2012 Posts: 13

Oh right, thanks for the link to my previous thread. For doublet, it's MACPUP 525, full-installation, running XFCE, and an update: JWM Removed.

Karl Godt · Joined: 20 Jun 2010 Posts: 2675 Location: Kiel,Germany

look in /etc/rc.d/rc.sysinit at the last 3/4 part of the script .

there is a status variable collecting 0 or 1 and if STATUS=$((STATUS+$?)) becomes 1 it says failed .

you might boot with something like debug or loglevel=4 (-7)

Chandra · Joined: 12 Apr 2012 Posts: 13

Ah, forgot to mention. I did check the /etc/rc.d/rc.sysinit but it didn't give me any clue of what might be wrong. I mean, it's just the script. The whole operation is carried out within the kernel, more specifically within particular modules, isn't it? Maybe debugging the module would reveal some clue. I'll check out with debug parameters during boot.

And besides, doesn't it feel strange to you that disregarding the failure, each optical device is working fine? If it wasn't, it would have been rather easier for me to infer that either the driver/module or the device itself isn't working. How much is the chance that some configuration could have caused this? Anyway, I'll try some debugging first. Thanks for the clue.

Karl Godt · Joined: 20 Jun 2010 Posts: 2675 Location: Kiel,Germany

rc.sysinit checks for media devices using these commands :

grep '^drive name:' /proc/sys/dev/cdrom/info

readlink /dev/cdrom

readlink /dev/dvd

cat /etc/cdburnerdevice

grep '^Can read DVD' /proc/sys/dev/cdrom/info

grep '^Can write CD' /proc/sys/dev/cdrom/info

hdparm -d1 /dev/$DVDTYPE

*

On my old 4.3 rc.sysinit it actually does not collect any return values from these commands , neither from

ln -sf /dev/$CDTYPE /dev/cdrom
ln -sf /dev/$DVDTYPE /dev/dvd
echo -n "$CDBURNERTYPE" > /etc/cdburnerdevice

*

There is a part for mousedevice and rc.country in this MEDIA part at my side and actually
/etc/rc.d/rc.country ;STATUS=$(( $STATUS + $? )) #this asks for keyboard layout.
status_func $STATUS

which is the only possibility to pass a 1 or 0 to status_func .

So it might be possible that your country setting is not working as it is intended by the script , but everything else is not checked if it worked or not Very Happy

But debug the driver Laughing

Good Luck

Chandra · Joined: 12 Apr 2012 Posts: 13

Found a better solution lately. The script that checks for optical media doesn't seem to do anything useful so I gave a shot and removed it. It's amazing to gain few seconds speed at bootup that too without having any problem with any of the media device.

Initially, I debugged the script to make sure everything is okay. I even manually tried to edit the script so that the STATUS sets to 1 but in vain. It still fails to recognize media. Besides, the country setting seems to be fine since there is no change to it. Anway, removed the script and I'm happy now, at least for the time being.

Thanks for your help!