The problem for me seems to be caused by /etc/udev/rules.d/70
-persistent-cd.rules containing two entries for the same optical drive
after upgrading to 12.10 from 12.04:
# HL-DT-ST_DVD+_-RW_GU10N (pci-0000:00:1f.2-scsi-1:0:0:0)
SUBSYSTEM=="block", ENV{ID_CDROM}=="?*",
ENV{ID_PATH}=="pci-0000:00:1f.2-scsi-1:0:0:0", SYMLINK+="cdrom",
ENV{GENERATED}="1"
SUBSYSTEM=="block", ENV{ID_CDROM}=="?*",
ENV{ID_PATH}=="pci-0000:00:1f.2-scsi-1:0:0:0", SYMLINK+="cdrw",
ENV{GENERATED}="1"
SUBSYSTEM=="block", ENV{ID_CDROM}=="?*",
ENV{ID_PATH}=="pci-0000:00:1f.2-scsi-1:0:0:0", SYMLINK+="dvd",
ENV{GENERATED}="1"
SUBSYSTEM=="block", ENV{ID_CDROM}=="?*",
ENV{ID_PATH}=="pci-0000:00:1f.2-scsi-1:0:0:0", SYMLINK+="dvdrw",
ENV{GENERATED}="1"
# HL-DT-ST_DVD+_-RW_GU10N (pci-0000:00:1f.2-scsi-0:0:0:0)
SUBSYSTEM=="block", ENV{ID_CDROM}=="?*",
ENV{ID_PATH}=="pci-0000:00:1f.2-scsi-0:0:0:0", SYMLINK+="cdrom1",
ENV{GENERATED}="1"
SUBSYSTEM=="block", ENV{ID_CDROM}=="?*",
ENV{ID_PATH}=="pci-0000:00:1f.2-scsi-0:0:0:0", SYMLINK+="cdrw1",
ENV{GENERATED}="1"
SUBSYSTEM=="block", ENV{ID_CDROM}=="?*",
ENV{ID_PATH}=="pci-0000:00:1f.2-scsi-0:0:0:0", SYMLINK+="dvd1",
ENV{GENERATED}="1"
SUBSYSTEM=="block", ENV{ID_CDROM}=="?*",
ENV{ID_PATH}=="pci-0000:00:1f.2-scsi-0:0:0:0", SYMLINK+="dvdrw1",
ENV{GENERATED}="1"
The last one is in effect (giving device aliases for the only optical
drive in my laptop a numeric suffix of "1" instead of none). Since the
file is generated, I just deleted it and rebooted. Now there is only one
entry, proper device links and eject works again. (Looks like the only
difference between the entries is SCSI device numbering, "scsi-1:0:0:0"
vs "scsi-0:0:0:0" in Ubuntu 12.10.)
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https://bugs.launchpad.net/bugs/795239
Title:
eject: unable to find or open device for: `cdrom' - but my cd is
/dev/cdrom1
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