I wanted to print a black and white test image with an embedded "Gray Gamma 2.2" profile. I extracted the profile and tried adding it to the Turboprint configuration application, but I get an error:
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FATAL ERROR: icc::parse: unsupported icc profile ERROR: cgats::open: DATA doesn't contain correct number of patches 0 != 0 profile_info: get_datafile_info returned 0
I ended up using the Adobe RGB profile and the result looks ok, but I wonder if this behaviour is normal for Turboprint.