Bug 144076 - kde fails to mount multi session CDROM (kio_devices_mounthelper thinks cdrom already mounted)
kde fails to mount multi session CDROM (kio_devices_mounthelper thinks cdrom ...
Product: Fedora
Classification: Fedora
Component: kdebase (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Ngo Than
Ben Levenson
Depends On:
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Reported: 2005-01-04 07:36 EST by James Hunt
Modified: 2008-08-02 19:40 EDT (History)
1 user (show)

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Fixed In Version: kde-3.5.3
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2006-07-14 06:26:10 EDT
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Description James Hunt 2005-01-04 07:36:46 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (compatible; Konqueror/3.3; Linux) (KHTML, like Gecko)

Description of problem:
Logging into KDE, and clicking the "CD Recorder" icon opens up konqueror, displaying location, "file:/media/cdrecorder".

However, expanding the "CD recorder" icon below "Devices" in the left-hand pane of the konqueror window, displays a pop-up error box with title bar "Error - kio_devices_mounthelper".

The error displayed is:

mount: block device /dev/hdc is write-protected, mounting

mount: /dev/hdc already mounted or /media/cdrecorder

Please check that the disk is entered correctly.

 [ OK ]

As shown above, your only option is to click OK.

It appears that /usr/bin/kio_devices_mounthelper does not understand
multi-session CD's.

If I run the following command as root, all works as expected:

   mount -osession=1 /dev/cdrom /mnt

kio_devices_mounthelper clearly needs to be made aware of multi-session CD's. What would be nice is if konqueror/kde would pop up a box when it detects a multi-session CD, and ask you _which_ session you want to mount. It could determine the fact that the CD is multi-session, and the number of sessions by running,

    cdrecord -toc

Alternatively, it could mount the last session (giving access to all the previous sessions I believe?) and then display them like this:


I think this bug is important to fix, since it was found by a relative who I'm attempting to migrate to Linux. They were surprised that Linux (well, strictly, KDE) was unable to display multi-session CD's.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. insert multi-session CD into CDROM drive
2. log into KDE
3. double-click "CD Recorder" icon
4. expand "CD Recorder" twistie under "Devices" in the konqueror
   window that KDE fires up.

Actual Results:  An error-box titled, "Error - kio_devices_mounthelper" pops up showing...

mount: block device /dev/hdc is write-protected, mounting

mount: /dev/hdc already mounted or /media/cdrecorder

Please check that the disk is entered correctly.

 [ OK ]

Expected Results:  I expected the CD to be mounted, either displaying all the sessions
combined into 1 view (a la Windoz), or a box to pop up asking me to select which session I wanted to mount.

Additional info:

I created multi-session CD using Linux like this:

# 1st session:
mkisofs -R -o file.iso \
  -graft-points some/cd/dir/=some/fs/dir
cdrecord -pad -data -multi dev=/dev/cdrom file.iso

# 2nd, and subsequent sessions.
mkisofs -R -o file2.iso \
  -C `cdrecord -msinfo dev=/dev/cdrom` -M /dev/cdrom \
  -graft-points some/cd/dir2/=some/fs/dir2
cdrecord -pad -data -multi dev=/dev/cdrom file2.iso

NOTE: The CD has *NOT* had the last session written yet.
Comment 1 David W. Legg 2005-02-24 05:06:07 EST
I get the same problem with a single-session CD-ROM using the latest
kde inc. kdebase-3.3.1-4.3.FC3.i386.rpm etc.

If I do mount /media/cdrom by hand and then use the CD-ROM icon,
konqueror starts and shows the contents of the CD ok.
Comment 2 Matthew Miller 2006-07-10 16:47:11 EDT
Fedora Core 3 is now maintained by the Fedora Legacy project for security
updates only. If this problem is a security issue, please reopen and
reassign to the Fedora Legacy product. If it is not a security issue and
hasn't been resolved in the current FC5 updates or in the FC6 test
release, reopen and change the version to match.

Thank you!
Comment 3 James Hunt 2006-07-14 06:10:05 EDT
OK, the problem now seems to have been resolved:]


If I navigate to /media/CDROM/ in the "root folder" tab in the left hand pane of
konqueror, I can now see my sessions represented as different folders. Expanding
the folders shows the expected files, and no errors are generated.

IMO this bug can be closed.

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