color and grayscale mode, as well as lineart on certain models,.Snoop logs are required to further investigate, please contact the sane-devel mailing list. They are declared in the backend as experimental and need the environment variable PIXMA_EXPERIMENT=1 to get recognized and activated.
The following models may use partly the same Pixma protocol as other devices listed above, but may still need some work. The following models are not well tested and/or the scanner sometimes hangs and must be switched off and on.