Stubborn Printer

[Geoffrey Leach]

A printer that had previously performed without problems has suddenly 
stopped printing jobs.  Here's the detail.

Printer: HP LaserJet 1300
Connect: Parallel to USB
CUPS: 1.2.10-7.fc6

Printer prints its (internal) test page fine.
When the USB cable is unplugged and replugged dmesg finds

usb 2-1: USB disconnect, address 3
drivers/usb/class/usblp.c: usblp0: removed
usb 2-1: new full speed USB device using uhci_hcd and address 4
Device driver usbdev2.4_ep00 lacks bus and class support for being 
resumed.
usb 2-1: configuration #1 chosen from 1 choice
Device driver usbdev2.4_ep01 lacks bus and class support for being 
resumed.
Device driver usbdev2.4_ep82 lacks bus and class support for being 
resumed.
drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 4 if 0 
alt 1 proto 2 vid 0x050D pid 0x0002

The CUPS interface sees the printer as its supposed to be. 
lpq returns:

hp_LaserJet_1300 is ready and printing
Rank    Owner   Job     File(s)                         Total Size
active  geoff   190     file:///tmp/balsa-body-TJIJUT   78848 bytes

The problem is independent of the type of printing. That is, plain text 
is no better than HTML.

Restarting the daemon, rebooting the system and power-cycling the 
printer has no effect.

Any suggestions?