[argyllcms] Re: {Spam?} Spotread problem: i1Pro2/EmissiveMode/RaspberryPi3
- From: "steve@xxxxxxxxxx" <steve@xxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sun, 30 Apr 2017 09:26:10 -0700
Thanks for the reply, Graeme:
So it works in reflective measurement mode
Yes
You mean the i1 Pro Display (aka i1 Display 3) ?
Yes
Sounds like a USB hardware or (kernel) driver issue.
Do you suggest any specific different kernel?
Typically people have problems the other way around, where it works
in emissive mode but fails in reflective mode, particularly with the
i1Pro2 which has very exacting USB power requirements. When the
illumination gets turned on the power dips below the i1Pro2 lower limit,
and it misbehaves.
I figure there must be a way to overcome the problem with software and that
it's not an insurmountable hardware issue with USB power for two reasons: 1.
Reflective mode works and as you pointed out reflective mode does all the same
stuff and uses the illuminant. 2. I've spoken to a friend who also has an RPi3
and i1pro2. He can duplicate the problem when he runs Raspbian as the OS but it
works when he runs an experimental build of Debian. Unfortunately I've not been
able to get Debian running and also have some other reasons I'd prefer to use
Raspbian if possible.
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