can't erase cdrw; permission denied

[Rthaduthd Anthnhkrc]

Binary package hint: k3b

I'm using a fresh install of Edgy (not an upgrade) - here is the debug-output from k3b:

System
-----------------------
K3b Version: 0.12.17

KDE Version: 3.5.5
QT Version: 3.3.6
Kernel: 2.6.17-10-generic
Devices
-----------------------
HL-DT-ST RW/DVD GCC-4241N 1.04 (/dev/scd0, /dev/sg1) at /media/cdrom0 [CD-R; CD-RW; CD-ROM; DVD-ROM] [DVD-ROM; CD-ROM; CD-R; CD-RW] [SAO; TAO; RAW; SAO/R96P; SAO/R96R; RAW/R16; RAW/R96P; RAW/R96R]

Used versions
-----------------------
cdrecord: 2.1.1a03

cdrecord command:
-----------------------
/usr/bin/X11/cdrecord.mmap -v gracetime=2 dev=1,0,0 speed=10 -tao driveropts=burnfree -eject blank=fast -force

cdrecord
-----------------------
/usr/bin/X11/cdrecord: Warning: Running on Linux-2.6.17-10-generic

/usr/bin/X11/cdrecord: There are unsettled issues with Linux-2.5 and newer.
/usr/bin/X11/cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.
scsidev: '1,0,0'
scsibus: 1 target: 0 lun: 0
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
/usr/bin/X11/cdrecord: Permission denied. Cannot open '/dev/sg0'. Cannot open SCSI driver.
/usr/bin/X11/cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
/usr/bin/X11/cdrecord: For possible transport specifiers try 'cdrecord dev=help'.
/usr/bin/X11/cdrecord:
/usr/bin/X11/cdrecord: For more information, install the cdrtools-doc
/usr/bin/X11/cdrecord: package and read /usr/share/doc/cdrecord/README.ATAPI.setup .
Cdrecord-Clone 2.01.01a03 (i686-pc-linux-gnu) Copyright (C) 1995-2005 Joerg Schilling
NOTE: this version of cdrecord is an inofficial (modified) release of cdrecord
      and thus may have bugs that are not present in the original version.
      Please send bug reports and support requests to <email address hidden>.
      The original author should not be bothered with problems of this version.
TOC Type: 1 = CD-ROM

[Rthaduthd Anthnhkrc (nthnuekeu-deactivatedaccount)]

same result when trying to burn (after erasing as root):

System
-----------------------
K3b Version: 0.12.17

KDE Version: 3.5.5
QT Version: 3.3.6
Kernel: 2.6.17-10-generic
Devices
-----------------------
HL-DT-ST RW/DVD GCC-4241N 1.04 (/dev/scd0, /dev/sg1) at /media/cdrom0 [CD-R; CD-RW; CD-ROM; DVD-ROM] [DVD-ROM; CD-ROM; CD-R; CD-RW] [SAO; TAO; RAW; SAO/R96P; SAO/R96R; RAW/R16; RAW/R96P; RAW/R96R]

K3b
-----------------------
Size of filesystem calculated: 134196

Used versions
-----------------------
cdrecord: 2.1.1a03

cdrecord
-----------------------
/usr/bin/X11/cdrecord: Warning: Running on Linux-2.6.17-10-generic
/usr/bin/X11/cdrecord: There are unsettled issues with Linux-2.5 and newer.
/usr/bin/X11/cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.
scsidev: '1,0,0'
scsibus: 1 target: 0 lun: 0
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
Error trying to open /dev/sg0 exclusively (Permission denied)... retrying in 1 second.
/usr/bin/X11/cdrecord: Permission denied. Cannot open '/dev/sg0'. Cannot open SCSI driver.
/usr/bin/X11/cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
/usr/bin/X11/cdrecord: For possible transport specifiers try 'cdrecord dev=help'.
/usr/bin/X11/cdrecord:
/usr/bin/X11/cdrecord: For more information, install the cdrtools-doc
/usr/bin/X11/cdrecord: package and read /usr/share/doc/cdrecord/README.ATAPI.setup .
Cdrecord-Clone 2.01.01a03 (i686-pc-linux-gnu) Copyright (C) 1995-2005 Joerg Schilling
NOTE: this version of cdrecord is an inofficial (modified) release of cdrecord
      and thus may have bugs that are not present in the original version.
      Please send bug reports and support requests to <email address hidden>.
      The original author should not be bothered with problems of this version.
TOC Type: 3 = CD-ROM XA mode 2

cdrecord command:
-----------------------
/usr/bin/X11/cdrecord.mmap -v gracetime=2 dev=1,0,0 speed=10 -tao driveropts=burnfree -eject -multi -xa -tsize=134196s -

mkisofs
-----------------------
134196
INFO: UTF-8 character encoding detected by locale settings.
 Assuming UTF-8 encoded filenames on source filesystem,
 use -input-charset to override.
Using test_preserve_commen000.svn_bas;1 for ibmr52-30.oct.2006/c/jsoncpp/trunk/test/.svn/prop-base/test_preserve_comment_01.json.svn-base (test_preserve_comment_01.expected.svn-base)
Using test_preserve_commen000.svn_wor;1 for ibmr52-30.oct.2006/c...

[Jens-Christian (beauman)]

I have the same problem on my newly installed edgy system.

I can't burn with k3b or baker with my normal user.

But: Right click on a *.iso file in nautilus, then "burn cd" works!

Burning with root and k3b works as well.

[Brian Murray (brian-murray)]

Could you please add the output of 'id' to your bug report?

[Rthaduthd Anthnhkrc (nthnuekeu-deactivatedaccount)]

..here is the output of `id':
uid=1000(lars) gid=1000(lars) groups=4(adm),20(dialout),24(cdrom),25(floppy),29(audio),30(dip),44(video),46(plugdev),109(lpadmin),111(scanner),114(admin),115(fuse),1000(lars)

I've manually changed the permissions on all cd-burning-tools I could find. Like for instance cdrecord cdrdao etc.. I think I also had to change the permissions of /dev/cdrom and/or similar.

Stuff works now. A bit curious if this really is necessary on a fresh install, or what could have changed the permissions here.

[Brian Murray (brian-murray)]

What is the group ownership of /dev/sg0 (that seems to be your burner)?

[Rthaduthd Anthnhkrc (nthnuekeu-deactivatedaccount)]

ls -l /dev/sg0
crw-rw---- 1 root root 21, 0 2006-12-21 16:43 /dev/sg0

..some more info:

root@ibmr52:~# file /dev/cdrom
/dev/cdrom: symbolic link to `scd0'
root@ibmr52:~# ls -l /dev/cdrom
lrwxrwxrwx 1 root root 4 2006-12-21 16:43 /dev/cdrom -> scd0
root@ibmr52:~# ls -l /dev/scd0
brw-rw---- 1 root cdrom 11, 0 2006-12-21 16:43 /dev/scd0

..but as said above i've done some quick (and careless, probably) changes just to get it to work in a hurry.. haven't really tried to burn anything in a while though

[Marco Rodrigues (gothicx)]

If it still happens with v1.0 / v1.0.1, feel free to re-open the bug. Thanks!