[cups.general] Re: printer fault! no idea what may be wrong

[Michael Sweet]

Till Kamppeter wrote:
> Michael Sweet wrote:
>> It would be really useful for you to submit a bug report on this.
>> We should be displaying "no such device" or something along those
>> lines instead of "success".
>>
>> Unfortunately, the recent HP driver updates include a USB backend that
>> unloads the standard kernel USB printer driver, preventing our backend
>> from working at all.  We have a patch for CUPS 1.3 that will use the
>> low-level kernel interface in the USB backend, which works around this
>> issue, however at present you can't use the HP drivers with the
>> standard CUPS USB backend...
>>
> 
> This LaserJet (and in general the LaserJet 1000, 1005, 1018, 1020 and
> Color LaserJet 1500, 1600, 2600) are not supported by HPLIP, so they do
> not use the "hp" backend, but the usual kernel-module-based "usb" CUPS
> backend. See also

As I understand things, HPLIP unloads the kernel driver module when
it is run, including when the "hp" backend is run to discover
printers.  This will effectively disable the "usb" backend...

-- 
______________________________________________________________________
Michael Sweet, Easy Software Products           mike at easysw dot com
Internet Printing and Document Software          http://www.easysw.com