On 2/17/14 8:10 PM, Gernot Hassenpflug wrote:
"Jonathan L. Parker" writes:

...All of a sudden, however, it won't print in
color. When I try I get only a black-and-white image that's way too
dark and pictures that almost look like photo negatives.
Any ideas where to start?

1. In your CUPS interface make sure you are using RGB for color, not
CMYK...
2. Make sure the resolution mode you are using is compatible with the
media, and with color...
3. Set CUPS debug option on in the admin panel.

Thanks for trying to help, Gernot.

I managed to find an easier resolution. I went back and checked the
list of available drivers for Canon printers and it appears that from
somewhere I've picked up one that appears to be from Canon itself-or the
result of a really good reverse-engineering job-for the BJC-85 printer,
which is very similar to the BJC-50 and uses the same cartridges.
Feeling I had nothing to lose, I went ahead and selected the driver and
after tweaking a few more settings I'm getting color quality about as
good as I get in Windows-and print speed to match. For a 15-year-old
printer only being used as a backup, that's more than enough.

For anyone facing this same problem, the driver I selected was the one
labeled simply "Canon BJC-85," not the one with "CUPS+Gutenprint 5.2.9"
behind it. If anyone wants to try the other driver and let us know how
you make out, that's fine. I'm quitting while I'm ahead.