Comment 118 for bug 420015

On Lucid Lynx 10.04 after updates I was having the same problem. My dmesg had the line:
[ 279.196192] usb 4-1: usbfs: interface 0 claimed by usblp while 'usb' sets config #1

and "usblp" module was still loaded.

I solved everything by blacklisting the usblp module, but not chmodding the /dev/bus... files.

I used these commands (as root):
echo "blacklist usblp" > /etc/modprobe.d/blacklist-cups.conf
rmmod usblp
/etc/init.d/cups restart
update-initramfs -u

should we file a new bug?