#686 Canon MG6700: borderless missing K & resolution issues

[Hector Martin]

When Borderless mode is enabled, with Resolution set to Automatic or 600x600 DPI, the print is correctly borderless but there seems to be no K ink used, leading to darker colors looking greyish. Disabling borderless mode without touching any other settings causes the printer to use K ink correctly.

Additionally, some other Resolution modes result in no printing (e.g. 600x600 DPI HIGH). The printer shows a "Processing" message and CUPS indicates progress, but nothing is ever printed and after the % complete reaches 100% after a slow crawl, the printer goes back into idle mode having never loaded paper.

Settings:

• A4 paper (plain)
• Image Quality: see above
• Color Model: CMYK
• Color Precision: Best
• Print Quality: Standard
• Shrink Page: Expand
• Cassete Tray: Driver-Controlled
• Ink Type: CMYK Color (or CMYKk color, seems to make no difference)
• Borderyess: Yes/No
• Color Correction: High Accuracy
• Image Type: Photograph

[Hector Martin]

I forgot to mention the version: gutenprint-5.2.11-pre2

[Gernot Hassenpflug]

Hello,
Borderless only works for photo media, both in Windows and in gutenprint. There is one borderless mode for plain media in the Windows driver, it is a 300dpi draft mode, so one can use that to test some things I guess.
Since borderless is for photo media, the resolution modes used are photo modes, which use k and not K.

For the second part of your report: is 600x600 DPI HIGH not working in bordered mode even? With plain media? If this is the case, I will have to check the definition again to see if the mode is implemented correctly.

Can you send a complete CUPS debug log of the 600x600 DPI HIGH mode, using plain media, and standard bordered printing?

Best regards,
Gernot Hassenpflug