CUPS not detect the USB printer connected

[Senthil Murugan]

Changing permission of /dev/usb/lp0 to 777 thing fine. Now i could able to see the USB printer as output of "lpinfo -v".
Here the sample output from my target system:
network socket
direct usb://HP/Officejet%20J4500%20series?serial=CN9BSD80B2052V
network http
network ipp
network lpd
direct scsi

When i issue the lp command to fire a print-out, i didn't see job printed on the printer. no error mesg on console. Appreciate your help if you can give the debug steps.

Senthil


> Michael,
>
> My development environment is so customized. i dont' have many groups. i have only root and admin as user. and root as group.
>
> So, i have change the permission to group as Read&Write. Is it any still require the file /dev/usb/lp0 should be in "sys" group?
>
> Thanks,
> Senthil
>
>
> > The files need a different group (whichever group is in cupsd.conf - =
> > usually "sys"...)
> >
> > On Sep 2, 2010, at 10:38 PM, Senthil Murugan wrote:
> >
> > > Michael,
> > >=20
> > > Here the /dev/usb/* file permission details,
> > >=20
> > > crw-rw----    1 root     root     180,   0 Jan  1 00:09 lp0
> > > crw-rw----    1 root     root     180,   1 Jan  1 00:10 lp1
> > >=20
> > > In /etc/cups/cupsd.conf enable the debug level as "debug2" and i could =
> > see the polling process detects only 5 fd some time. some time it shows =
> > 7 fd.
> > >=20
> > > [02/Jan/1970:17:14:10 +0000] cupsdDoSelect: Read on fd 5...
> > > this may give some info to you on the problem part.
> > >=20
> > > Thanks,
> > > Senthil
> > >=20
> > >> You need to check the permissions of the /dev/usb/* files.
> > >>=20
> > >> On Sep 2, 2010, at 7:25 AM, Senthil Murugan wrote:
> > >>=20
> > >>> Thanks Michael for quick input. OpenWrt for embedded device not =
> > having =3D
> > >> all the users in my config. I have only root user and admin user. I =
> > have =3D
> > >> root permission for the /usr/lib/cups/backend/usb. owner and group =3D
> > >> permission also for user root. I login as a root and executes lpinfo =
> > -v. =3D
> > >> its shows only 5 devices. Same time when i change the directory =3D
> > >> /usr/lib/cups/backend/ run "usb" i could able to see the printer =
> > details =3D
> > >> including serial number.
> > >>> =3D20
> > >>> Thanks,
> > >>> Senthil
> > >>> =3D20
> > >>>> Sounds like a permissions problem - the USB backend runs as the =
> > "lp" =3D
> > >> =3D3D
> > >>>> user by default, so the USB device files will need to be writable =
> > by =3D
> > >> =3D3D
> > >>>> "lp" or have the appropriate group with group write enabled.
> > >>>> =3D20
> > >>>> On Sep 1, 2010, at 6:06 AM, Senthil Murugan wrote:
> > >>>> =3D20
> > >>>>> Hi Team,
> > >>>>> =3D3D20
> > >>>>> I'm working on the embedded system with OpenWrt plus CUPS 1.3.10. =
> > =3D3D
> > >>>> lpinfo -v not listing my usb printer connected. I could see the =3D
> > >> device =3D3D
> > >>>> connected in /proc/bus/usb/devices & /usr/share/cups/backend/usb =
> > also =3D
> > >> =3D3D
> > >>>> shows the printer connected. But my lpinfo -v command shows always =
> > 5 =3D
> > >> =3D3D
> > >>>> other devices (http, ipp, socket, lpd & scsi).
> > >>>>> =3D3D20
> > >>>>> went through some extend of debug by enabling DEBUG option in code =
> > =3D3D=3D
> > >>=20
> > >>>> (debug.h). when i enable DEBUG option lpinfo -v hangs.
> > >>>>> =3D3D20
> > >>>>> Looking experts input to resolve my problem.
> > >>>>> =3D3D20
> > >>>>> Thanks,
> > >>>>> Senthil
> > >>>>> _______________________________________________
> > >>>>> cups-dev mailing list
> > >>>>> cups-dev at easysw.com
> > >>>>> http://lists.easysw.com/mailman/listinfo/cups-dev
> > >>>> =3D20
> > >>>> =3D
> > >> =
> > ________________________________________________________________________
> > >>>> Michael Sweet, Senior Printing System Engineer, PWG Chair
> > >>>> =3D20
> > >>>> =3D20
> > >>>> =3D20
> > >>>> =3D20
> > >>> =3D20
> > >>> _______________________________________________
> > >>> cups-dev mailing list
> > >>> cups-dev at easysw.com
> > >>> http://lists.easysw.com/mailman/listinfo/cups-dev
> > >>=20
> > >> =
> > ________________________________________________________________________
> > >> Michael Sweet, Senior Printing System Engineer, PWG Chair
> > >>=20
> > >>=20
> > >>=20
> > >>=20
> > >=20
> > > _______________________________________________
> > > cups-dev mailing list
> > > cups-dev at easysw.com
> > > http://lists.easysw.com/mailman/listinfo/cups-dev
> >
> > ________________________________________________________________________
> > Michael Sweet, Senior Printing System Engineer, PWG Chair
> >
> >
> >
> >
>