[sf-lug] SF-LUG meeting notes for Monday 21 January 2019

[Bobbie Sellers]

On 1/25/19 1:45 PM, Rick Moen wrote:
> Quoting Bobbie Sellers (bliss-sf4ever at dslextreme.com):
>
>> On 1/25/19 3:23 AM, Rick Moen wrote:
>>> Do you have at least a printer object defined in
>>> http://localhost:631/printers/  ?  If so, is the 'Status' field displayed
>>> as 'Idle'?
>>      I don't find that directory?
> Um, 'directory'?  I'm sorry, what are you talking about?
     Well it finds a blank page.
>
> You know that 'http://localhost:631/printers/' is a URL intended to be
> parsed and acted upon by Web browser software, right?  And, since you
> keep talking about CUPS and your work setting up printers, I'd assumed
> you know the most famous, best-known thing about it, which is that it
> puts up a local administrative WebUI for the local system administrator
> at http://localhost:631/ .  http://localhost:631/printers/ is,
> obviously, a subpage where known printer objects (queues) are listed and
> can be configured.  Moreover, CUPS displays there whether the printer in
> question has been recently reachable or not, and permits the admin user,
> if he/she wishes, to send test pages to the queue(s) shown, and to check
> on and (if desired) cancel pending print jobs in the queue(s).


>
> If you were unaware of that, then you somehow missed hearing about te
> main distinction, main attraction, and most famous feature in the CUPS
> engine.  So, if so, you should tool around in those pages and get to
> know them.
     Actually I never claimed any knowledge of CUPS but that it is the tool
generally used by GNU/Linux distribution to establish connections to
printers,  When it works it works very well but when it fails it is 
difficult
to understand why.

>
>> But searching on printers I find the following
>
> You found that where?  Is this a file on your system?  If so, what file?
> It looks like it could be your /etc/cups/printers.conf file -- but I'm
> mystified about why specifically you posted that.

     Because that is what I could find.
>
> Among other things, that in no way clarifies whether you have the
> Gutenprint RPM package installed -- just that CUPS _expects_ to print
> to the thing using a Gutenprint filter/driver.

     If the Gutenprint package is not installed I have wasted a lof of 
download time.
     But using the command you recommended here is the result:
[bliss at bliss ~]$ rpm -qa | grep -i gutenprint
gutenprint-ijs-5.2.10-1pclos2014
lib64gutenprint2-5.2.10-1pclos2014
gutenprint-common-5.2.10-1pclos2014
gutenprint-foomatic-5.2.10-1pclos2014
gutenprint-escputil-5.2.10-1pclos2014
lib64gutenprintui2_1-5.2.10-1pclos2014
gutenprint-cups-5.2.10-1pclos2014
gutenprint-gimp2-5.2.10-1pclos2014

and for foomatic
[bliss at bliss ~]$ rpm -qa | grep -i foomatic
foomatic-db-4.0-2.20180120.1pclos2018
foomatic-filters-4.0.9-2pclos2018
gutenprint-foomatic-5.2.10-1pclos2014
foomatic-db-engine-4.0.12-1pclos2018

> One thing I note:
>
>     DeviceURI dnssd://EPSON8E2DF7._printer._tcp.local/
>
> Ugh.  ZeroConf network transport.  I would never, ever rely on that.
> Any of the alternatives is less flakey and easier to diagnose.

>
>
>> Now I want to thank you for your advice but I seem to have a dead printer.
> Well, it's your call wether you want to give up on your printer, but you
> might want to do basic hardware diagnosis before throwing it away.
> Does the LCD display screen indicate a hardware problem?  Does the
> http://localhost:631/printers/ screen appear to show the printer as
> online and reachable?  Does it pass a self-test?[1]  Can you have CUPS
> send it a test page and have it comply?

     It has printed nothing* and the LCD screen does not allow for much 
non-maintenance information.
      *That includes running the usual test page, the self-test of the 
nozzle pattern and the print head cleaning
routine.
>
> [1] https://files.support.epson.com/htmldocs/nx510_/nx510_ug/wwhelp/wwhimpl/js/html/wwhelp.htm

     All I see there is a blank page with a vertical line about 1/5 of 
the way from the left side of the screen.

     As I may have mentioned elsewhere I will try another distribution 
on the printer to see if perhaps some
reaction can be coaxed from the NX515.

     Have a pleasant weekend.

     Bobbie Sellers
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