[argyllcms] Re: Problem accessing HCFR probe

Frédéric Mantegazza wrote:
I made some tests using /dev/ttyACM0, and I have some problems reading color patches : when they are very dark (neer black), I get a reading error, but it works fine with brighter color patches.
Did you observe the same with yours? Could it be a usb problem (with my patch), or just a sensor problem? How did you use it? Near or far the screen? 

I observe quite long response times for low light. If I completely
black the sensor out, it takes about 26 seconds for the device to
respond. I would guess that the Linux ttyACM driver has a shorter
timeout than this. Talking via Libusb allowed me to set the timeouts
appropriately.

Graeme Gill.

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