gimp-print-devel

Re: [Gimp-print-devel] Gutenprint and Epson Pro 7900

[Walker B. <fo...@wa...>]

Yes, you can do this in model XML file for the printer. These live inside of the /Library/Printers/ gutenprint and deep inside those folders in MacOS. I think you can do this live (aka, just changing the XMLs) it’s been a while since I did this though.

Regards,
Walker



> On Jan 15, 2021, at 7:38 AM, Ronald Jensen <ro...@vo...> wrote:
> 
> Hello,
> 
> My brother is a Debian developer and he recommended me to use your Gutenprint software in my attempts to use my Epson Pro 7900 printer.
> 
> The black channel on the printhead is dead, so what I need is some kind of software that can ‘trick’ the printer to be using the green or orange channel for black.
> 
> Is that possible with your software?
> 
> If so, should I be installing CUPS to do so?
> 
> I am using Mac OS X
> 
> Best regards,
> 
> Ronald
> 
> _______________________________________________
> Gimp-print-devel mailing list
> Gim...@li...
> https://lists.sourceforge.net/lists/listinfo/gimp-print-devel

[Gimp-print-devel] canon printers

[cl2k <cl...@sy...>]

Would it be possible to include Canon TS8200 series in the software?

Thanks, you guys are doing a great job!

[Gimp-print-devel] Gutenprint and Epson Pro 7900

[Ronald J. <ro...@vo...>]

Hello,

My brother is a Debian developer and he recommended me to use your Gutenprint software in my attempts to use my Epson Pro 7900 printer.

The black channel on the printhead is dead, so what I need is some kind of software that can ‘trick’ the printer to be using the green or orange channel for black.

Is that possible with your software?

If so, should I be installing CUPS to do so?

I am using Mac OS X

Best regards,

Ronald

Re: [Gimp-print-devel] driver doesn't work

[Protea W. J. <aik...@gm...>]

On Thu, Jan 14, 2021 at 11:26 PM Diane R. Shogren <dsh...@fa...>
wrote:

> FYI
>
> downloaded 5.3.3 version
>
> Canon G1000 series print driver does not work for Canon G1020 printer when
> with Apple's Big Sur
>

Hello,
Sorry to hear that.
Do you have any error messages from the CUPS debug log to tell us what went
wrong?
If you have a linux system you could try there (I assume you use USB
connection) and tell us if the issue is really with the driver, or whether
it is an issue with MacOSX.
I seem to remember many people using the Gxxx drivers already, so I would
like to check whether this is an edge case, or unrelated to the specific
driver.

very pleased to discover what you are doing even if it didn’t help me at
> this moment!
>

Best regards,
Gernot Hassenpflug
-- 
Protea Wines Japan
Tel: 070-5550-9076
https://www.proteawines.jp

[Gimp-print-devel] driver doesn't work

[Diane R. S. <dsh...@fa...>]

FYI

downloaded 5.3.3 version

Canon G1000 series print driver does not work for Canon G1020 printer when with Apple's Big Sur

very pleased to discover what you are doing even if it didn’t help me at this moment!

Re: [Gimp-print-devel] Problem with getting a Canon Selphy CP790 to work on Mac OSX

[Solomon P. <pi...@sh...>]

On Sat, Jan 09, 2021 at 11:10:37PM +0100, Clemens Hartmann wrote:
> >The most likely explanation here is that your CP790 was inadvertantly
> >configured to use the standard 'usb' CUPS backend, rather than the
> >custom 'gutenprint53+usb' backend.
> 
> What can I do to make the printer use the correct backend ?

Clemens,

I'm sorry about the delay; this fell through the cracks over the holidays.

This email from our archive should have enough information to make that 
determination:

   https://sourceforge.net/p/gimp-print/mailman/message/37165463/

 - Solomon
-- 
Solomon Peachy			      pizza at shaftnet dot org (email&xmpp)
                                      @pizza:shaftnet dot org   (matrix)
High Springs, FL                      speachy (freenode)

Re: [Gimp-print-devel] Mac OS Build status

[Steve L. <sle...@ya...>]

I may be able to use the programs from the older dev platform.  The problems are building the package and disk image.  Gutenprint and all the pieces compile and link apparently correctly.  So I will try to cobble together a working distribution this weekend.  

Steve Letter

> On Jan 13, 2021, at 10:17 AM, Matt Broughton <wal...@ma...> wrote:
> 
> 
> 
>> On Jan 12, 2021, at 2:16 PM, Steve Letter via Gimp-print-devel <gim...@li...> wrote:
>> 
>> I last reported that I believe I have run into bugs with the latest development system. I have reported one of the two issues I am seeing to Apple. It takes several days to get any response from them. So far either I haven’t made clear the issue or the wrong people are viewing my report. I believe I gave them everything they need to reproduce the issue. 
>> 
>> Steve Letter
>> Sent from my Symbolics Lisp Machine using rmail. 
> 
> 
> Hopefully you will hear back soon.  Assuming they acknowledge the bug(s), I doubt the fix probably won't show up until the next point release.  My "new/old" mac mini came with 10.15 installed even though it is not supported on the machine.  I tried to build the tarball there with Developer Tools 12.3 for  "arch x64_86 arch arm64".  It threw a fit saying that the platform or operating system was not supported and then crashed.  I'm not sure if it was me, the computer, or the software.
> 
> Without knowing the time frame for Apple to address the bugs,  you may want to build  5.3.4 as you did last time and release it.  We know that works on Big Sur and the M1 chip.
> 
> Matt
> 

Re: [Gimp-print-devel] Mac OS Build status

[Matt B. <wal...@ma...>]

> On Jan 12, 2021, at 2:16 PM, Steve Letter via Gimp-print-devel <gim...@li...> wrote:
> 
> I last reported that I believe I have run into bugs with the latest development system. I have reported one of the two issues I am seeing to Apple. It takes several days to get any response from them. So far either I haven’t made clear the issue or the wrong people are viewing my report. I believe I gave them everything they need to reproduce the issue. 
> 
> Steve Letter
> Sent from my Symbolics Lisp Machine using rmail. 


Hopefully you will hear back soon.  Assuming they acknowledge the bug(s), I doubt the fix probably won't show up until the next point release.  My "new/old" mac mini came with 10.15 installed even though it is not supported on the machine.  I tried to build the tarball there with Developer Tools 12.3 for  "arch x64_86 arch arm64".  It threw a fit saying that the platform or operating system was not supported and then crashed.  I'm not sure if it was me, the computer, or the software.

Without knowing the time frame for Apple to address the bugs,  you may want to build  5.3.4 as you did last time and release it.  We know that works on Big Sur and the M1 chip.

Matt

Re: [Gimp-print-devel] Printer driver for MAC OS Big Sur 11.1

[Matt B. <wal...@ma...>]

> On Jan 12, 2021, at 9:45 AM, Anders Stavland <ast...@ha...> wrote:
> 
> 
> 
> I use Kyocera FS-1030D.
> 
> Kyocera doesn’t support this printer with updated drivers.
> 
> My last printer I used for my Kyocera was from Gutenprint. I used this driver successfully until my last update to Mac OS Big Sur. (11.1)
> 
> 
> With this update I have not been able to find any drivers for my FS-1030D.
> 
> Will Gutenprint or Gimp-Print have drivers for which can be used for  Mac OS Big Sur?
> 
> 
> Best regards
> 
> Anders Stavland

Your Kyocera FS-1030D is indeed supported by Gutenprint.  The latest installer will work on macos 11 Big Sur.  You can download it at

https://sourceforge.net/projects/gimp-print/files/gutenprint-5.3/5.3.3/gutenprint-5.3.3_rev.dmg/download

Please note that if you are using one of the new Apple computers with the M1 chip, you will also need to install Rosetta.

Matt

[Gimp-print-devel] Mac OS Build status

[Steve L. <sle...@ya...>]

I last reported that I believe I have run into bugs with the latest development system. I have reported one of the two issues I am seeing to Apple. It takes several days to get any response from them. So far either I haven’t made clear the issue or the wrong people are viewing my report. I believe I gave them everything they need to reproduce the issue. 

Steve Letter
Sent from my Symbolics Lisp Machine using rmail. 

[Gimp-print-devel] Printer driver for MAC OS Big Sur 11.1

[Anders S. <ast...@ha...>]

I use Kyocera FS-1030D.

Kyocera doesn’t support this printer with updated drivers.

My last printer I used for my Kyocera was from Gutenprint. I used this driver successfully until my last update to Mac OS Big Sur. (11.1)


With this update I have not been able to find any drivers for my FS-1030D.

Will Gutenprint or Gimp-Print have drivers for which can be used for  Mac OS Big Sur?


Best regards

Anders Stavland

Re: [Gimp-print-devel] Problem with getting a Canon Selphy CP790 to work on Mac OSX

[Clemens H. <cl...@gm...>]

Hello Gernot, Hello Solomon
thank you very much for your answers – I‘m sorry for answering late.
I do not have a Linux System – I only have Macs with different OSX systems.
I can also try the printer with the original driver on an old system which
I haven't done yet. (but I think it will be OK because it prints directly
from an SD-Card).
It is not urgent for me – if you need any further informations of my
printer, just tell me how I can help

>The most likely explanation here is that your CP790 was inadvertantly
>configured to use the standard 'usb' CUPS backend, rather than the
>custom 'gutenprint53+usb' backend.

What can I do to make the printer use the correct backend ?

>If you could confirm the backend that's being used (visible in the
>connection URI) that would tell us what the next steps need to be.

Where shall I look … I can send Screenshots from my system preferences and
from my printer configuration.
Would this already be helpful ? or do I have to go deeper into the system
via the terminal ?
I‘ll be back at my office on monday where I can have a look at the printer.

best regards,
Clemens


Am Fr., 8. Jan. 2021 um 06:00 Uhr schrieb Protea Wines Japan <
aik...@gm...>:

> On Fri, Jan 8, 2021 at 10:17 AM Clemens Hartmann <cl...@gm...> wrote:
>
>> Hello,
>> I’d be very happy if you can help me getting a Canon Selphy CP790 to work
>> on Mac OSX.
>> I tried in two systems (OSX 10.14 and OSX 10.13) but I wasn’t successful.
>> The Printer is connected via USB-Cable
>> It is recognised in the System Preferences as CP790 on a USB-Port
>> I can choose the Printer in the Preview-Program or any other Program that
>> can print.
>> After having sent away the print order, nothing happens …
>>
>> it would really be great if i could make this printer work … (I was
>> successful with an older Selphy CP510 and a CP710)
>>
>
> Hello Clemens,
> Do you know if the printer works on a linux system?
> I still have a CP790, which we used for the initial support experiments,
> in storage and can test it on the weekend if necessary (or if there are any
> suspected regressions).
> Best regards,
> Gernot Hassenpflug
>


-- 
—
CLMNZ

Clemens Hartmann

Ostendorfstraße 3
76199 Karlsruhe

+49.(0)721.49974708
+49.(0)176.24661506
cl...@cl...

www.clmnz.de

Re: [Gimp-print-devel] Problem with getting a Canon Selphy CP790 to work on Mac OSX

[Solomon P. <pi...@sh...>]

On Fri, Jan 08, 2021 at 01:52:34AM +0100, Clemens Hartmann wrote:
> I’d be very happy if you can help me getting a Canon Selphy CP790 to 
> work on Mac OSX. I tried in two systems (OSX 10.14 and OSX 10.13) but 
> I wasn’t successful.

The most likely explanation here is that your CP790 was inadvertantly 
configured to use the standard 'usb' CUPS backend, rather than the 
custom 'gutenprint53+usb' backend.

> it would really be great if i could make this printer work … (I was 
> successful with an older Selphy CP510 and a CP710)

The CP790 is a special case; from a driver perspective it's a sibling of 
the ES40 rather than the more typical CP-series model.  However, I don't 
have access to either the CP790 or ES40, so it's certianly possible a 
regression has slipped in since these were last tested several years 
ago.

If you could confirm the backend that's being used (visible in the 
connection URI) that would tell us what the next steps need to be.

Cheers,

 - Solomon
-- 
Solomon Peachy			      pizza at shaftnet dot org (email&xmpp)
                                      @pizza:shaftnet dot org   (matrix)
High Springs, FL                      speachy (freenode)

Re: [Gimp-print-devel] Problem with getting a Canon Selphy CP790 to work on Mac OSX

[Protea W. J. <aik...@gm...>]

On Fri, Jan 8, 2021 at 10:17 AM Clemens Hartmann <cl...@gm...> wrote:

> Hello,
> I’d be very happy if you can help me getting a Canon Selphy CP790 to work
> on Mac OSX.
> I tried in two systems (OSX 10.14 and OSX 10.13) but I wasn’t successful.
> The Printer is connected via USB-Cable
> It is recognised in the System Preferences as CP790 on a USB-Port
> I can choose the Printer in the Preview-Program or any other Program that
> can print.
> After having sent away the print order, nothing happens …
>
> it would really be great if i could make this printer work … (I was
> successful with an older Selphy CP510 and a CP710)
>

Hello Clemens,
Do you know if the printer works on a linux system?
I still have a CP790, which we used for the initial support experiments, in
storage and can test it on the weekend if necessary (or if there are any
suspected regressions).
Best regards,
Gernot Hassenpflug

[Gimp-print-devel] Problem with getting a Canon Selphy CP790 to work on Mac OSX

[Clemens H. <cl...@gm...>]

Hello,
I’d be very happy if you can help me getting a Canon Selphy CP790 to work on Mac OSX.
I tried in two systems (OSX 10.14 and OSX 10.13) but I wasn’t successful.
The Printer is connected via USB-Cable
It is recognised in the System Preferences as CP790 on a USB-Port
I can choose the Printer in the Preview-Program or any other Program that can print.
After having sent away the print order, nothing happens …

it would really be great if i could make this printer work … (I was successful with an older Selphy CP510 and a CP710)

best regards from Karlsruhe/Germany,
Clemens

Re: [Gimp-print-devel] Not printing

[Bill Z. <jam...@gm...>]

On 1/3/21 8:41 AM, Robert Krawitz wrote:
> On 1/3/21 2:47 AM, Bill Zuercher wrote:
>> Robert;
>>
>> I have installed photoprint and it's dependencies.  Now I can print from it and from
>>
>> gimp using the cups+gutenprint driver.  I still cannot print from lp nor librewrite, but I think
>>
>> that is a cups problem.  If you have any suggestions for these, please let me know.
>>
>> Thanks for your interest,
> Again, please reply-all not just to me personally if you would like any assistance.
>
> We need to know what version of CUPS and what OS you are running if we are to provide you any help.
>
>> On 1/1/21 5:46 PM, Robert Krawitz wrote:
>>> On 1/1/21 6:19 PM, Bill Zuercher wrote:
>>>> On 1/1/21 4:58 PM, Bill Zuercher wrote:
>>>>> The os is Ubuntu 20.04, CUPS version is 2.3
>>>>>
>>>> driver is Epson SureColorP600-CUPS+Gutenprintv5.3.3
>>> Please reply-all or reply-list.
>>>
>>> What OS (Linux, and if so what Linux)?  MacOS (and if so, what)?
>>>
>>>>> On 1/1/21 8:48 AM, Robert Krawitz wrote:
>>>>>> On 1/1/21 12:42 AM, Bill Zuercher wrote:
>>>>>>> I can get a nozzle check pattern from my Epson SurecolorP600, but not a test print.  Also, I
>>>>>>> cannot
>>>>>>> get a print from lp nor any application.
>>>>>>>
>>>>>>> I have been trying to fix this problem for 4 days and need some good help
>>>>>>>
>>>>>>> Bill Zuercher
>>>>>>>
>>>>>>> Note;  My basic email address is...@ac...
>>>>>> Hi,
>>>>>>
>>>>>> What driver are you using, what OS, and what version of CUPS?

Re: [Gimp-print-devel] Not printing

[Robert K. <rl...@al...>]

On 1/3/21 2:47 AM, Bill Zuercher wrote:
> Robert;
> 
> I have installed photoprint and it's dependencies.  Now I can print from it and from
> 
> gimp using the cups+gutenprint driver.  I still cannot print from lp nor librewrite, but I think
> 
> that is a cups problem.  If you have any suggestions for these, please let me know.
> 
> Thanks for your interest,

Again, please reply-all not just to me personally if you would like any assistance.

We need to know what version of CUPS and what OS you are running if we are to provide you any help.

> On 1/1/21 5:46 PM, Robert Krawitz wrote:
>> On 1/1/21 6:19 PM, Bill Zuercher wrote:
>>> On 1/1/21 4:58 PM, Bill Zuercher wrote:
>>>> The os is Ubuntu 20.04, CUPS version is 2.3
>>>>
>>> driver is Epson SureColorP600-CUPS+Gutenprintv5.3.3
>> Please reply-all or reply-list.
>>
>> What OS (Linux, and if so what Linux)?  MacOS (and if so, what)?
>>
>>>> On 1/1/21 8:48 AM, Robert Krawitz wrote:
>>>>> On 1/1/21 12:42 AM, Bill Zuercher wrote:
>>>>>> I can get a nozzle check pattern from my Epson SurecolorP600, but not a test print.  Also, I
>>>>>> cannot
>>>>>> get a print from lp nor any application.
>>>>>>
>>>>>> I have been trying to fix this problem for 4 days and need some good help
>>>>>>
>>>>>> Bill Zuercher
>>>>>>
>>>>>> Note;  My basic email address is...@ac...
>>>>> Hi,
>>>>>
>>>>> What driver are you using, what OS, and what version of CUPS?

Re: [Gimp-print-devel] Not printing

[Robert K. <rl...@al...>]

On 1/1/21 6:19 PM, Bill Zuercher wrote:
> 
> On 1/1/21 4:58 PM, Bill Zuercher wrote:
>>
>> The os is Ubuntu 20.04, CUPS version is 2.3
>>
> driver is Epson SureColorP600-CUPS+Gutenprintv5.3.3

Please reply-all or reply-list.

What OS (Linux, and if so what Linux)?  MacOS (and if so, what)?

>> On 1/1/21 8:48 AM, Robert Krawitz wrote:
>>> On 1/1/21 12:42 AM, Bill Zuercher wrote:
>>>> I can get a nozzle check pattern from my Epson SurecolorP600, but not a test print.  Also, I cannot
>>>> get a print from lp nor any application.
>>>>
>>>> I have been trying to fix this problem for 4 days and need some good help
>>>>
>>>> Bill Zuercher
>>>>
>>>> Note;  My basic email address is...@ac...
>>> Hi,
>>>
>>> What driver are you using, what OS, and what version of CUPS?

Re: [Gimp-print-devel] Not printing

[Robert K. <rl...@al...>]

On 1/1/21 12:42 AM, Bill Zuercher wrote:
> I can get a nozzle check pattern from my Epson SurecolorP600, but not a test print.  Also, I cannot
> get a print from lp nor any application.
> 
> I have been trying to fix this problem for 4 days and need some good help
> 
> Bill Zuercher
> 
> Note;  My basic email address is bi...@ac...

Hi,

What driver are you using, what OS, and what version of CUPS?

[Gimp-print-devel] Not printing

[Bill Z. <jam...@gm...>]

I can get a nozzle check pattern from my Epson SurecolorP600, but not a 
test print.  Also, I cannot get a print from lp nor any application.

I have been trying to fix this problem for 4 days and need some good help

Bill Zuercher

Note;  My basic email address is bi...@ac...

Re: [Gimp-print-devel] Photo Print Quality issue Canon G2000 series

[Jonathan I. <drc...@gm...>]

Sounds great, I will give these recommendations a try! Your input is
greatly appreciated (especially given we have a new baby and we were trying
to print photos :) )

Wishing you a happy new year.

On Wed, Dec 30, 2020 at 5:36 AM Protea Wines Japan <aik...@gm...>
wrote:

> On Wed, Dec 30, 2020 at 7:20 PM Jonathan Ing <drc...@gm...>
> wrote:
> >
> > Hi Gernot,
> >
> > Thanks for this wonderful explanation - I have no background in tuning
> drivers before so this makes a LOT of sense! One question I have is then is
> there any resource or guide for CUPS density controls? For example, if you
> see x, y or z, increase or decrease this parameter?
>
> Hi Jonathan,
> Not really, that is general CUPS information, I guess searches are
> your best bet for what people have been doing for their particular
> purposes.
> As I wrote, it is a matter of extensive experimentation to work out
> per media type at least, and most likely per resolution mode (used for
> that media), what density corrections are required for each ink for
> different hue, saturation, and value for each colour, and combination
> of colours. You could start with a strip of black ink printing evenly
> from 0% to 100% intensity, and see if you can get an output that
> matches this. Some areas might need more careful tuning.
> Then go on to cyan, then magenta, and finally yellow, which is hardest to
> see.
>
> PS quick addendum, the plus Glossy II can use the other 2 photo modes
> as well, the mode one I listed is solely useable by plusPhoto II
> though.
>
> Best regards,
> Gernot Hassenpflug
>
> > Thanks!
> >
> >
> > On Wed, Dec 30, 2020 at 4:57 AM Protea Wines Japan <aik...@gm...>
> wrote:
> >>
> >> On Wed, Dec 30, 2020 at 12:20 AM Jonathan Ing <drc...@gm...>
> wrote:
> >>>
> >>> Hi, I am using the gutenprint v 5.3.3-4 on Ubuntu 20.04-1 and I notice
> that when printing photos (I am using 4x6 glossy, photo mode) and pictures
> have a low bitrate look to them... almost pixelated. I have set DPI to max
> 600x600 and nothing seems to help. Not sure if this is a potential bug?
> >>
> >>
> >> Hello,
> >> I am sure photo printing will not be good without some serious tuning
> of densities in CUPS, since the Canon driver does not include any
> calibration of colours.
> >> However, maybe you can get better results if I explain the process,
> what you are saying about resolution is not really how it works.
> >>
> >> Firstly, the Canon printheads only have resolutions of 300dpi or 600dpi
> (some have a single mode that is at 1200dpi).
> >> So "setting resolution to X dpi" is not what determines the quality.
> >> The firmware uses the physical printhead resolution, multi-pass
> printing and complex algorithms making use of the available physical inks,
> to print at some "effective resolution".
> >> The above process, and/or the possible quality, are different for each
> media type.
> >>
> >> Thus, when you select a resolution, you are not seeing a simple "X dpi"
> name for the resolution,
> >> what you see is a "resolution mode" name, such as "High quality (600
> DPI)", for example.
> >> Each media type has several possible resolution modes associated with
> it, and hints are given in the drop-down, so that users do not attempt to
> use, say, plain media modes, with photo media, or vice versa.
> >> If a resolution mode is chosen that the firmware does not know about
> for a particular media type, the printer will generally not print.
> >>
> >> So to prevent non-printing, if a non-compatible mode is selected in the
> Canon driver, then there is a forced selection to a similar quality mode
> accepted by the media.
> >> As a result, depending on the other options apart from media type
> (e.g., double-sided printing), you might not be printing with the mode you
> think you selected.
> >> The only way to be sure is to check the debug logs (setting them up in
> the CUPS interface).
> >>
> >> The G1000, G2000, G3000 share a common driver, with the following
> resolution modes available:
> >>
> >> A. For plain media
> >>
> >> 600x600 DPI HIGH
> >> 600x600 DPI
> >> 300x300 DPI
> >>
> >> B. For plus Glossy II only
> >>
> >> 600x600 DPI PHOTO HIGHEST plus Glossy II
> >>
> >> C. For other photo media
> >>
> >> 600x600 DPI PHOTO HIGH
> >> 600x600 DPI PHOTO
> >>
> >> D. For envelope and hagaki (postcard) media
> >>
> >> 600x600 DPI HIGH (Env/Hagaki)
> >> 600x600 DPI (Env/Hagaki)
> >>
> >> If you are trying one of the photo media resolution modes, and it is of
> poor quality, the tuning of the density of individual inks is probably way
> off.
> >> Tuning is a lot of experimental effort, but you can try with the CUPS
> density controls for the different channels to see if you can improve
> matters.
> >>
> >> Best regards,
> >> Gernot Hassenpflug
>
>
>
> --
> Protea Wines Japan
> Tel: 070-5550-9076
> https://www.proteawines.jp
>

Re: [Gimp-print-devel] Photo Print Quality issue Canon G2000 series

[Protea W. J. <aik...@gm...>]

On Wed, Dec 30, 2020 at 7:20 PM Jonathan Ing <drc...@gm...> wrote:
>
> Hi Gernot,
>
> Thanks for this wonderful explanation - I have no background in tuning drivers before so this makes a LOT of sense! One question I have is then is there any resource or guide for CUPS density controls? For example, if you see x, y or z, increase or decrease this parameter?

Hi Jonathan,
Not really, that is general CUPS information, I guess searches are
your best bet for what people have been doing for their particular
purposes.
As I wrote, it is a matter of extensive experimentation to work out
per media type at least, and most likely per resolution mode (used for
that media), what density corrections are required for each ink for
different hue, saturation, and value for each colour, and combination
of colours. You could start with a strip of black ink printing evenly
from 0% to 100% intensity, and see if you can get an output that
matches this. Some areas might need more careful tuning.
Then go on to cyan, then magenta, and finally yellow, which is hardest to see.

PS quick addendum, the plus Glossy II can use the other 2 photo modes
as well, the mode one I listed is solely useable by plusPhoto II
though.

Best regards,
Gernot Hassenpflug

> Thanks!
>
>
> On Wed, Dec 30, 2020 at 4:57 AM Protea Wines Japan <aik...@gm...> wrote:
>>
>> On Wed, Dec 30, 2020 at 12:20 AM Jonathan Ing <drc...@gm...> wrote:
>>>
>>> Hi, I am using the gutenprint v 5.3.3-4 on Ubuntu 20.04-1 and I notice that when printing photos (I am using 4x6 glossy, photo mode) and pictures have a low bitrate look to them... almost pixelated. I have set DPI to max 600x600 and nothing seems to help. Not sure if this is a potential bug?
>>
>>
>> Hello,
>> I am sure photo printing will not be good without some serious tuning of densities in CUPS, since the Canon driver does not include any calibration of colours.
>> However, maybe you can get better results if I explain the process, what you are saying about resolution is not really how it works.
>>
>> Firstly, the Canon printheads only have resolutions of 300dpi or 600dpi (some have a single mode that is at 1200dpi).
>> So "setting resolution to X dpi" is not what determines the quality.
>> The firmware uses the physical printhead resolution, multi-pass printing and complex algorithms making use of the available physical inks, to print at some "effective resolution".
>> The above process, and/or the possible quality, are different for each media type.
>>
>> Thus, when you select a resolution, you are not seeing a simple "X dpi" name for the resolution,
>> what you see is a "resolution mode" name, such as "High quality (600 DPI)", for example.
>> Each media type has several possible resolution modes associated with it, and hints are given in the drop-down, so that users do not attempt to use, say, plain media modes, with photo media, or vice versa.
>> If a resolution mode is chosen that the firmware does not know about for a particular media type, the printer will generally not print.
>>
>> So to prevent non-printing, if a non-compatible mode is selected in the Canon driver, then there is a forced selection to a similar quality mode accepted by the media.
>> As a result, depending on the other options apart from media type (e.g., double-sided printing), you might not be printing with the mode you think you selected.
>> The only way to be sure is to check the debug logs (setting them up in the CUPS interface).
>>
>> The G1000, G2000, G3000 share a common driver, with the following resolution modes available:
>>
>> A. For plain media
>>
>> 600x600 DPI HIGH
>> 600x600 DPI
>> 300x300 DPI
>>
>> B. For plus Glossy II only
>>
>> 600x600 DPI PHOTO HIGHEST plus Glossy II
>>
>> C. For other photo media
>>
>> 600x600 DPI PHOTO HIGH
>> 600x600 DPI PHOTO
>>
>> D. For envelope and hagaki (postcard) media
>>
>> 600x600 DPI HIGH (Env/Hagaki)
>> 600x600 DPI (Env/Hagaki)
>>
>> If you are trying one of the photo media resolution modes, and it is of poor quality, the tuning of the density of individual inks is probably way off.
>> Tuning is a lot of experimental effort, but you can try with the CUPS density controls for the different channels to see if you can improve matters.
>>
>> Best regards,
>> Gernot Hassenpflug



-- 
Protea Wines Japan
Tel: 070-5550-9076
https://www.proteawines.jp

Re: [Gimp-print-devel] Photo Print Quality issue Canon G2000 series

[Jonathan I. <drc...@gm...>]

Hi Gernot,

Thanks for this wonderful explanation - I have no background in tuning
drivers before so this makes a LOT of sense! One question I have is then is
there any resource or guide for CUPS density controls? For example, if you
see x, y or z, increase or decrease this parameter?


Thanks!


On Wed, Dec 30, 2020 at 4:57 AM Protea Wines Japan <aik...@gm...>
wrote:

> On Wed, Dec 30, 2020 at 12:20 AM Jonathan Ing <drc...@gm...>
> wrote:
>
>> Hi, I am using the gutenprint v 5.3.3-4 on Ubuntu 20.04-1 and I notice
>> that when printing photos (I am using 4x6 glossy, photo mode) and pictures
>> have a low bitrate look to them... almost pixelated. I have set DPI to max
>> 600x600 and nothing seems to help. Not sure if this is a potential bug?
>>
>
> Hello,
> I am sure photo printing will not be good without some serious tuning of
> densities in CUPS, since the Canon driver does not include any calibration
> of colours.
> However, maybe you can get better results if I explain the process, what
> you are saying about resolution is not really how it works.
>
> Firstly, the Canon printheads only have resolutions of 300dpi or 600dpi
> (some have a single mode that is at 1200dpi).
> So "setting resolution to X dpi" is not what determines the quality.
> The firmware uses the physical printhead resolution, multi-pass printing
> and complex algorithms making use of the available physical inks, to print
> at some "effective resolution".
> The above process, and/or the possible quality, are different for each
> media type.
>
> Thus, when you select a resolution, you are not seeing a simple "X dpi"
> name for the resolution,
> what you see is a "resolution mode" name, such as "High quality (600
> DPI)", for example.
> Each media type has several possible resolution modes associated with it,
> and hints are given in the drop-down, so that users do not attempt to use,
> say, plain media modes, with photo media, or vice versa.
> If a resolution mode is chosen that the firmware does not know about for a
> particular media type, the printer will generally not print.
>
> So to prevent non-printing, if a non-compatible mode is selected in the
> Canon driver, then there is a forced selection to a similar quality mode
> accepted by the media.
> As a result, depending on the other options apart from media type (e.g.,
> double-sided printing), you might not be printing with the mode you think
> you selected.
> The only way to be sure is to check the debug logs (setting them up in the
> CUPS interface).
>
> The G1000, G2000, G3000 share a common driver, with the following
> resolution modes available:
>
> A. For plain media
>
> 600x600 DPI HIGH
> 600x600 DPI
> 300x300 DPI
>
> B. For plus Glossy II only
>
> 600x600 DPI PHOTO HIGHEST plus Glossy II
>
> C. For other photo media
>
> 600x600 DPI PHOTO HIGH
> 600x600 DPI PHOTO
>
> D. For envelope and hagaki (postcard) media
>
> 600x600 DPI HIGH (Env/Hagaki)
> 600x600 DPI (Env/Hagaki)
>
> If you are trying one of the photo media resolution modes, and it is of
> poor quality, the tuning of the density of individual inks is probably way
> off.
> Tuning is a lot of experimental effort, but you can try with the CUPS
> density controls for the different channels to see if you can improve
> matters.
>
> Best regards,
> Gernot Hassenpflug
>

Re: [Gimp-print-devel] Photo Print Quality issue Canon G2000 series

[Protea W. J. <aik...@gm...>]

On Wed, Dec 30, 2020 at 12:20 AM Jonathan Ing <drc...@gm...>
wrote:

> Hi, I am using the gutenprint v 5.3.3-4 on Ubuntu 20.04-1 and I notice
> that when printing photos (I am using 4x6 glossy, photo mode) and pictures
> have a low bitrate look to them... almost pixelated. I have set DPI to max
> 600x600 and nothing seems to help. Not sure if this is a potential bug?
>

Hello,
I am sure photo printing will not be good without some serious tuning of
densities in CUPS, since the Canon driver does not include any calibration
of colours.
However, maybe you can get better results if I explain the process, what
you are saying about resolution is not really how it works.

Firstly, the Canon printheads only have resolutions of 300dpi or 600dpi
(some have a single mode that is at 1200dpi).
So "setting resolution to X dpi" is not what determines the quality.
The firmware uses the physical printhead resolution, multi-pass printing
and complex algorithms making use of the available physical inks, to print
at some "effective resolution".
The above process, and/or the possible quality, are different for each
media type.

Thus, when you select a resolution, you are not seeing a simple "X dpi"
name for the resolution,
what you see is a "resolution mode" name, such as "High quality (600 DPI)",
for example.
Each media type has several possible resolution modes associated with it,
and hints are given in the drop-down, so that users do not attempt to use,
say, plain media modes, with photo media, or vice versa.
If a resolution mode is chosen that the firmware does not know about for a
particular media type, the printer will generally not print.

So to prevent non-printing, if a non-compatible mode is selected in the
Canon driver, then there is a forced selection to a similar quality mode
accepted by the media.
As a result, depending on the other options apart from media type (e.g.,
double-sided printing), you might not be printing with the mode you think
you selected.
The only way to be sure is to check the debug logs (setting them up in the
CUPS interface).

The G1000, G2000, G3000 share a common driver, with the following
resolution modes available:

A. For plain media

600x600 DPI HIGH
600x600 DPI
300x300 DPI

B. For plus Glossy II only

600x600 DPI PHOTO HIGHEST plus Glossy II

C. For other photo media

600x600 DPI PHOTO HIGH
600x600 DPI PHOTO

D. For envelope and hagaki (postcard) media

600x600 DPI HIGH (Env/Hagaki)
600x600 DPI (Env/Hagaki)

If you are trying one of the photo media resolution modes, and it is of
poor quality, the tuning of the density of individual inks is probably way
off.
Tuning is a lot of experimental effort, but you can try with the CUPS
density controls for the different channels to see if you can improve
matters.

Best regards,
Gernot Hassenpflug

[Gimp-print-devel] Universal Mac Big Sur Update

[Steve L. <sle...@ya...>]

There appears to be a bug in one of the critical programs needed to build the Mac Release. I will be reporting it to Apple tomorrow.  For the curious, the program is hdiutil. There are some possibilities for a workaround. 

It will be a few days before I will have time to devote to the build. 

Steve Letter
Sent from my Symbolics Lisp Machine using rmail.