Comment 9 for bug 422930

After updating to 1.4.0-5, there is no longer a new hp: queue being added, and the usb: queue is not being marked as unavailable. However, test jobs printed to the usb: queue stall indefinitely, never reaching the printer.

$ lpinfo -v
network http
direct scsi
network socket
network ipp
network lpd
network beh
direct hp:/usb/PSC_750?serial=MY2ASD4157WB
network smb
direct hpfax
$ /usr/lib/cups/backend/usb
bash: /usr/lib/cups/backend/usb: Permission denied
$ sudo /usr/lib/cups/backend/usb
DEBUG: list_devices
DEBUG: usb_find_busses=5
DEBUG: usb_find_devices=8
$ sudo su lp -c /usr/lib/cups/backend/usb
sh: /usr/lib/cups/backend/usb: Permission denied
$ ls -l /usr/lib/cups/backend/usb
-r-xr--r-- 2 root root 22448 2009-09-06 04:53 /usr/lib/cups/backend/usb
$ ls -l /dev/bus/usb/**
/dev/bus/usb/001:
total 0
crw-rw-r-- 1 root root 189, 0 2009-09-04 11:37 001
crw-rw-r-- 1 root root 189, 20 2009-09-08 12:15 021
crw-rw-r--+ 1 root lp 189, 21 2009-09-08 12:44 022
crw-rw-r-- 1 root root 189, 22 2009-09-08 12:15 023

/dev/bus/usb/002:
total 0
crw-rw-r-- 1 root root 189, 128 2009-09-04 11:37 001

/dev/bus/usb/003:
total 0
crw-rw-r-- 1 root root 189, 256 2009-09-04 11:37 001

/dev/bus/usb/004:
total 0
crw-rw-r-- 1 root root 189, 384 2009-09-04 11:37 001

/dev/bus/usb/005:
total 0
crw-rw-r-- 1 root root 189, 512 2009-09-04 11:37 001
$ lsusb
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 023: ID 0d3d:0028 Tangtop Technology Co., Ltd
Bus 001 Device 022: ID 03f0:1411 Hewlett-Packard PSC 750
Bus 001 Device 021: ID 04b4:6560 Cypress Semiconductor Corp. CY7C65640 USB-2.0 "TetraHub"
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
$