Ubuntu: How to remove/edit printer URIs?

[Peter]

> Breezy 5.10 (not upgradeable yet :( )  CUPS V1.1.23-10 ubunt
>
> Am trying to delete one printer and install another.
>
> With existing printer before deletion
> = = = = = = = = = = = = = = = = = = = = =
> ~# cat /etc/cups/printers.conf
> # Printer configuration file for CUPS v1.1.23
> # Written by cupsd on Sun Feb 14 18:28:27 2010
> <DefaultPrinter Photosmart>
> Info
> Location
> DeviceURI beh:/1/0/30/usb:/dev/usb/lp0
> State Idle
> Accepting Yes
> JobSheets none none
> QuotaPeriod 0
> PageLimit 0
> KLimit 0
> </Printer>
> = = = = = = = = = = = = = = = = = = = = =
> ...and...
> = = = = = = = = = = = = = = = = = = = = =
> ~# lpinfo -v
> network socket
> network beh
> network bluetooth
> network http
> network ipp
> network lpd
> direct canon:/dev/lp0
> direct epson:/dev/lp0
> direct parallel:/dev/lp0
> direct usb:/dev/usb/lp0
> direct usb:/dev/usb/lp1
> direct usb:/dev/usb/lp2
> direct usb:/dev/usb/lp3
> direct usb:/dev/usb/lp4
> direct usb:/dev/usb/lp5
> direct usb:/dev/usb/lp6
> direct usb:/dev/usb/lp7
> direct usb:/dev/usb/lp8
> direct usb:/dev/usb/lp9
> direct usb:/dev/usb/lp10
> direct usb:/dev/usb/lp11
> direct usb:/dev/usb/lp12
> direct usb:/dev/usb/lp13
> direct usb:/dev/usb/lp14
> direct usb:/dev/usb/lp15
> network smb
> = = = = = = = = = = = = = = = = = = = = =
> beh is the backend error handler which keeps the printer 'live' if ever it's powered off when a print is requested :-))
>
> Now with the printer deleted using CUPS GUI (localhost:631) and the new one not installed the printer URIs get screwed up:
> = = = = = = = = = = = = = = = = = = = = =
> ~# lpinfo -v
> network socket
> network beh
> network bluetooth
> direct hp:/no_device_found
> network http
> network ipp
> network lpd
> direct canon:/dev/lp0
> direct epson:/dev/lp0
> direct parallel:/dev/lp0
> direct usb://CB770A?serial=CN9BACB10F05CT           <<<< !!!!
> direct usb://hp/deskjet%205550?serial=MY24T3M1YR2L  <<<< !!!!
> direct usb:/dev/usb/lp2
> direct usb:/dev/usb/lp3
> direct usb:/dev/usb/lp4
> direct usb:/dev/usb/lp5
> direct usb:/dev/usb/lp6
> direct usb:/dev/usb/lp7
> direct usb:/dev/usb/lp8
> direct usb:/dev/usb/lp9
> direct usb:/dev/usb/lp10
> direct usb:/dev/usb/lp11
> direct usb:/dev/usb/lp12
> direct usb:/dev/usb/lp13
> direct usb:/dev/usb/lp14
> direct usb:/dev/usb/lp15
> network smb
> = = = = = = = = = = = = = = = = = = = = =
> and whatever I try by installing another printer (HP Deskjet 5550) on what used to be direct usb:/dev/usb/lp0 it succeeds but will not print.
> I guess because the printer URI doesn't match the serial number or usb://CB770A doesn't actually exist.
>
> BTW I have NEVER used a printer type CB770A!
> Installing the printer on other usb ports, lp1, lp2, etc., also fails to print.
>
> Note that this Deskjet5550 works fine in Windows and from Ubuntu 10.04 so it isn't a printer specific problem.
>
> I have spent quite some time trying to find where the printer URIs are defined even using strace (which calls localhost so I lose trace) without success.
>
> Anyone any suggestions as to how I can remove/edit these ghost printer URIs?
>
> I spent most of yesterday grepping through the whole drive for CB770A - not found :-((
>
> Note that I have attempted to upgrade CUPS and install latest HP drivers previously but both fail with undocumented/unresolved errors, probably because the OS is too old.

No one any ideas, please?