print-color-mode cannot be switched or removed

[Golddouble]

(If this is not the right place to ask this question, please let me know. Thank you.)

In my printer properties -> Job options I have the filter "print-color-mode" color/monochrome

I have not added this filter "manually/by myself". It was automatically installed.

0. Question: What/who did install this filter? Was it cups? Was it system-config-printer ?

1. Question: What is the purpose of this? What does this filter do?

2. Question: When I try to change this setting from color to monochrom and press "Apply", then it automatically goes back to "Color". Why? Is this normal?

3. Question: When I press the "-" to delete this filter and after press "Apply", then it automatically brings this filter back. Why? Is this as it should be?

Animation to 2. and 3.

4. I can print s/w with my printer, although the setting "print-color-mode" is set to "color". Would I become a better s/w print quality, when I would be able to change this filter to "monochrome"?

Thank you.

[zdohnal]

In my printer properties -> Job options I have the filter "print-color-mode" color/monochrome

I have not added this filter "manually/by myself". It was automatically installed.

It is not a filter, it is a job option defined by your driver.

1. Question: What/who did install this filter? Was it cups? Was it system-config-printer ?

The option is installed based on your driver by CUPS.

2. Question: What is the purpose of this? What does this filter do?

Switches the colors which are used in printouts - color/gray.

3. Question: When I try to change this setting from color to monochrom and press "Apply", then it automatically goes back to "Color". Why? Is this normal?

4. Question: When I press the "-" to delete this filter and after press "Apply", then it automatically brings this filter back. Why? Is this as it should be?

Those two points look like bugs, thanks for letting me know - the print-color-mode being defined there looks as a duplicate, since you can set this up in 'Printer options', which works, so I'll remove the printer-color-mode from job options.

Animation to 2. and 3.

1. I can print s/w with my printer, although the setting "print-color-mode" is set to "color". Would I become a better s/w print quality, when I would be able to change this filter to "monochrome"?

I'm not sure what you mean by s/w, but let's guess it is a 'black & white'/'grayscale'/'monochrome'.
The answer to the question - no, it just influences colors. You have printer-resolution and print-quality options for managing quality.

Thank you.

[Golddouble]

I'm not sure what you mean by s/w, but let's guess it is a 'black & white'/'grayscale'/'monochrome'.

Yes, I mean "Black Only Grayscale".

Those two points look like bugs, thanks for letting me know - the print-color-mode being defined there looks as a duplicate, since you can set this up in 'Printer options', which works, so I'll remove the printer-color-mode from job options.

But when "print-color-mode" shows "color" shouldn't then the value in 'Printer options' also be color? But it is not.
It is "Black Only Grayscale" in 'Printer options' and "print-color-mode" shows "color". Isn't this a contradiction? Shouldn't both values be the same?

Thank you.

[zdohnal]

But when "print-color-mode" shows "color" shouldn't then the value in 'Printer options' also be color? But it is not.
It is "Black Only Grayscale" in 'Printer options' and "print-color-mode" shows "color". Isn't this a contradiction? Shouldn't both values be the same?

That's another reason why I marked this as a bug :) . The print-color-mode option will be removed from 'Job options' to prevent this.