[cups] LaserJet stopped working

[Jörg Thümmler]

Am 14.04.23 um 06:37 schrieb Ken Wright:
> On Thu, 2023-04-13 at 15:04 +0200, Jörg Thümmler wrote:
>> Am 13.04.23 um 13:49 schrieb Ken Wright:
>>> On Thu, 2023-04-13 at 07:22 +0200, Jörg Thümmler wrote:
>>>> Am 13.04.23 um 04:15 schrieb Ken Wright:
>>>>> On Tue, 2023-04-11 at 09:13 +0200, Jörg Thümmler wrote:
>>>>>> Hi,
>>>>>>
>>>>>> have a look at the print system of the laptop... if it's
>>>>>> linux & cups, look at localhost:631 and "printers". Cups
>>>>>> stops print queues when errors occure by default.
> 
>>>>>> Same may be, if your laptop runs on windows, have a look at
>>>>>> the "settings/devices/printers/<yourprinter>" ... if it is
>>>>>> "offline" means connection to the cups server is somehow
>>>>>> lost.
>>>>>>
>>>>>> Also check the cups on the server, same thing, queue may be
>>>>>> stopped.
>>>>>
>>>>> Now here's an interesting datum:  I can print from the server's
>>>>> command line using the lp command, but when I try to print a
>>>>> test page from CUPS (2.4.2, if that helps) nothing prints.  The
>>>>> print job shows "connecting to printer" then goes away, as
>>>>> though the printing had finished.  I suspect this may be
>>>>> related to the reason I can't print from my Ubuntu laptop.
>>>>
>>>> Hi,
>>>>
>>>> do you use the same printer queue in both cases?
>>>>
>>> Yes.
>>
>> Hi,
>>
>> the document you can print by "lp" command is pdf or ps type as the
>> cups testpage is?
> 
> It was just a text file.  A .conf file from nginx.
> 
>> can you show your working "lp" commandline?
> 
> lp /etc/nginx/conf.d/duplicati.conf
> 
>> I can only remember one situation like this, there cups correctly was
>> sending the jobs , but the printer didn't understand the printfile
>> format. So the files "vanished" in cups (found then in the "finished"
>> folder). The printer began to load the job (LED flashing) and shortly
>> after that stopped flashing and that was all.
> 
> After I read this, I copied a one-page .pdf to the server and tried
> printing it, along with another plain text file.  Neither worked until
> I rebooted the server, after which they printed immediately.  Still
> can't print the test page from CUPS, though.
> 
> 
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Hi,

can you show the result of "systemctl status cups" and "lpstat -t" 
runnned by root user and the section of the printer in the 
/etc/printers.conf on both machines? There might be some problem with 
the errorhandling.

Try "cupsenable <yourprinterqueue>" and "cupsaccept <yourprinterqueue>" 
as root on both machines, if the "lpstat" shows "disabled" or "not 
accepting jobs".

-- 
cu

jth