Having the same problem in Edgy. Even root couldn't write CDs. But it seems something (gnome?) is mounting blank images as well ( /dev/hdc on /media/cdrom0 type iso9660 (ro,noexec,nosuid,nodev) ), thus umount /dev/yourcdrwdevice fixed a problem for me.
:~$ uname -a Linux erik-lap 2.6.17-10-generic #2 SMP Tue Dec 5 22:28:26 UTC 2006 i686 GNU/Linux :~$ cdrecord --version Cdrecord-Clone 2.01.01a03 (i686-pc-linux-gnu) Copyright (C) 1995-2005 Joerg Schilling -- Cannot scan availables devices https://launchpad.net/bugs/2765 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
