Ubuntu

I've changed users permissions with Bastille and now cdrom doesn't mount automatically

Asked by Nabor Oliveira

I used Bastille to fine tune the security settings of my computer. One the things that I choose was to restrict users that have special permissions, like mounting cdrom drives (just root and my username). Since that, when I insert a cdrom I get the message:

It was not possible to mount the volume "VOLUME_NAME".
mount: it is necessary to be superuser to mount

I tried to use Bastille again to restore the default configuration but the problem persists.

How can I fix that? Is there any username related to a group or application that should have permission to mount cdrom?

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Nabor Oliveira
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Hanusz leszek (leszek-skynet) said : 		#1

Hello,

Navigate to System->Administration->Users and Groups
choose your user and click on properties.
Go to "User Privileges" tab

You should have the "Access external storage devices automatically" option checked.

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Best Nabor Oliveira (naborcoj) said : 		#2

Hi Hanusz,

my user account had already have this option checked. It seems that Bastille had removed the suid flag from "mount" and "umount". I fixed that using "chmod u+s" on them an now the cdrom mounts automatically.

The problem now is that the eject button doesn't cause the drive to open, unless I unmount the cdrom before. That is pretty annoying. My laptop is a HP Pavilion zt3280 with a NEC dvr+-rw drive (model DVD__RW_ND_6450A).
I tried the solution from this thread http://ubuntuforums.org/showthread.php?t=115499&highlight=CDROM+eject+button , but it has an undesirable effect. The system understands that the volume is still mounted. So, when I insert another disc, the system shows the previous label and doesn't start the autoplay action for the content on the disc.

I've posted another question with that new problem here: https://answers.launchpad.net/ubuntu/+question/8322

Thanks anyway,
Nabor