[cups] [Gimp-print-devel] Epson R200 Ink Levels

Robert Krawitz rlk at alum.mit.edu
Fri Jul 4 18:54:40 PDT 2014


On Fri, 04 Jul 2014 13:07:27 -0400, Michael Sweet wrote:
> Because ink levels are not standardized using legacy protocols like the USB Printer Class.  Drivers are required, and since Gutenprint does not report ink levels CUPS has no way to show them.
>
> (that's the point of standards like AirPrint, IPP Everywhere, and IPP USB - no printer-specific drivers so everything is supported out-of-the-box without extra software)

It sounds like we want to make escputil libusb-aware.  What would be
involved with that?

> On Jul 4, 2014, at 10:03 AM, Ian Prideaux <worzel at gmx.co.uk> wrote:
>
>> On 04/07/14 01:26, James Cloos wrote:
>>> It comes down to an incompatibility between modern cups and the programs
>>> which require the usblp module.
>>> 
>>> The real fix is to upgrade the latter to use libusb rather than
>>> expecting the kernel to translate between the lp protocol and its
>>> usb encapsulation.

-- 
Robert Krawitz                                     <rlk at alum.mit.edu>

MIT VI-3 1987 - Congrats MIT Engineers 6 straight men's hoops tourney
Tall Clubs International  --  http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom  --  http://ProgFree.org
Project lead for Gutenprint   --    http://gimp-print.sourceforge.net

"Linux doesn't dictate how I work, I dictate how Linux works."
--Eric Crampton



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