Hi

I did install the proposed package (cups) but  the ubuntu 11.10 (64bit)/cups  still can not connect to the usb printer (lexmark).

The usb printer works fine in when connect to ubuntu 11.04 (32bit) running inside a vmplayer ( host is the same ubuntu 11.10 (64bit) which can not connect to the usb printer (lexmark)). Therefore, I believe it is not a  hardware problem ( printer, usb cable, ..)

Details of ubuntu 11.10 (64bit)/cups :

isc-scn@niesen:~$ uname -a
Linux niesen 3.0.0-14-generic #23-Ubuntu SMP Mon Nov 21 20:28:43 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
isc-scn@niesen:~$ 
isc-scn@niesen:~$ lpstat -v
device for Lexmark_S300S400_Series: usb://Lexmark/S300-S400%20Series?serial=90T309862362717&interface=1
isc-scn@niesen:~$ 
isc-scn@niesen:~$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.10
DISTRIB_CODENAME=oneiric
DISTRIB_DESCRIPTION="Ubuntu 11.10"
isc-scn@niesen:~$

isc-scn@niesen:~$ lsusb
(..)
Bus 002 Device 004: ID 043d:0180 Lexmark International, Inc. 
(..)
isc-scn@niesen:~$

isc-scn@niesen:~$  sudo apt-get install -t oneiric-proposed cups
Reading package lists... Done
Building dependency tree       
Reading state information... Done
cups is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
isc-scn@niesen:~$ 

isc-scn@niesen:~$ dpkg -s cups
Package: cups
Status: install ok installed
Priority: optional
Section: net
Installed-Size: 8412
Maintainer: Ubuntu Developers <email address hidden>
Architecture: amd64
Version: 1.5.0-8ubuntu6
Replaces: cupsddk-drivers (<< 1.4.0), ghostscript-cups (<< 9.02~)
Provides: cupsddk-drivers
Depends: libavahi-client3 (>= 0.6.16), libavahi-common3 (>= 0.6.16), libc6 (>= 2.7), libcups2 (>= 1.5.0), libcupscgi1 (>= 1.4.2), libcupsdriver1 (>= 1.4.0), libcupsimage2 (>= 1.4.0), libcupsmime1 (>= 1.5.0-0ubuntu1), libcupsppdc1 (>= 1.4.0), libdbus-1-3 (>= 1.0.2), libgcc1 (>= 1:4.1.1), libgnutls26 (>= 2.9.11-0), libgssapi-krb5-2 (>= 1.8+dfsg), libijs-0.35, libkrb5-3 (>= 1.6.dfsg.2), liblcms1 (>= 1.15-1), libldap-2.4-2 (>= 2.4.7), libpam0g (>= 0.99.7.1), libpaper1, libpoppler13, libslp1, libstdc++6 (>= 4.1.1), libusb-0.1-4 (>= 2:0.1.12), zlib1g (>= 1:1.1.4), debconf (>= 1.2.9) | debconf-2.0, upstart-job, poppler-utils (>= 0.12), procps, ghostscript (>= 9.02~), lsb-base (>= 3), cups-common (>= 1.5.0), cups-client (>= 1.5.0-8ubuntu6), ssl-cert (>= 1.0.11), adduser, bc, ttf-freefont, cups-ppdc
Recommends: avahi-daemon, colord, foomatic-filters (>= 4.0), cups-driver-gutenprint, ghostscript-cups (>= 9.02~)
Suggests: cups-bsd, foomatic-db-compressed-ppds | foomatic-db, hplip, cups-pdf, udev, smbclient
Breaks: foomatic-filters (<< 4.0), ghostscript-cups (<< 9.02~)
Conflicts: cupsddk-drivers (<< 1.4.0)
Conffiles:
 /etc/fonts/conf.d/99pdftoopvp.conf a5221cfad70a981c80864229ef56586d
 /etc/logrotate.d/cups 5bb41fa9900f0d1c565954405a2bd7c4
 /etc/default/cups 2b436fbb1a32b82b6aba45a76a1d7e40
 /etc/pam.d/cups ff2488324854f7b1e892bb0df062d5f0
 /etc/init/cups.conf 3ef31c29980411c55687e404d230838d
 /etc/modprobe.d/blacklist-cups-usblp.conf 7cc07d7c468c0f9e4585b87a61d3327f
 /etc/ufw/applications.d/cups 29e98a6d850da251e180c3d68dec2bd3
 /etc/apparmor.d/usr.sbin.cupsd 029e14549838b34bdd82901904bbcc9c
 /etc/cups/cupsd.conf bd2b7cffb7cc23734ccee179d2584419
 /etc/cups/snmp.conf 55baa060a50f48f9dbb99c6eb60dc04c
 /etc/cups/cupsd.conf.default 03cc7d46e085b96b9dea5f78cb80d116
Description: Common UNIX Printing System(tm) - server
 The Common UNIX Printing System (or CUPS(tm)) is a printing system and
 general replacement for lpd and the like.  It supports the Internet
 Printing Protocol (IPP), and has its own filtering driver model for
 handling various document types.
 .
 This package provides the CUPS scheduler/daemon and related files.
Original-Maintainer: Debian CUPS Maintainers <email address hidden>
isc-scn@niesen:~$