[arch-general] Unload module after printer startup

Mauro Santos registo.mailling at gmail.com
Tue Aug 3 11:02:51 EDT 2010

On 08/03/2010 02:47 PM, Mario Daniel Carugno wrote:
> Yes, that's all i do to configure the printer.
> Now I want to automatize the removal of the module after i turn on the printer.
> If there's a rule that loads the module when the printer is turned on,
> I guess there must be a way to catch that rule to disable the module
> loading.
> 2010/8/3 vlad <vla at uni-bonn.de>:
>> Hello,
>> On Tue, Aug 03, 2010 at 09:52:05AM -0300, Mario Daniel Carugno wrote:
>>> Thanks for the help
>>> I don't use backlist because in the wiki says so.
>>> In http://wiki.archlinux.org/index.php/CUPS_printer-specific_problems#LaserJet_1020
>>> i can read:
>>> "Ensure that the usblp module is not blacklisted in the MODULES array
>>> of /etc/rc.conf"
>>> Just in case, I'll try it anyway.
>>> Thanks
>> There's clearly described what you have to do.
>> "
>> ...
>> Ensure that the CUPS daemon is running and added to the /etc/rc.conf
>> file:
>> # /etc/rc.d/cups start
>> File: /etc/rc.conf
>> DAEMONS=(... cups crond ...)
>> Now plug in the USB printer and turn it on. The printer will whirl,
>> pause, then whirl once more as the firmware is uploaded. Now remove the
>> usblp module:
>> # rmmod usblp
>> Note: The usblp module must be removed after the firmware is loaded to
>> the printer, and before any printing job is submitted.
>> "
>> As I understand it there is no way to automatize this.
>> --

Ok I see your problem, you could try to do what someone suggests in the
thread referenced in the wiki:

"You would have to guarantee the sequence load usblp/call hplj1000
script/unload usblp. IMHO to avoid race conditions, it would be better
to incorporate load/unload usblp into the hplj1000 script itself: load
usblp before the script looks for an lp* device, and unload usblp after
the firmware has been successfully copied."

If that proves to work then let the packager know about the workaround
and maybe submit a patch.

One last thing, try not to top post, it makes reading the thread harder.

Mauro Santos

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