[argyllcms] Re: error "Instrument Access Failed" with Spyder 2
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 11 Apr 2011 11:09:08 +1000
Hi,
I think this is just a manifestation of the problem that the Spyder 2
doesn't work through a hub. Some hardware includes secondary hubs
on the MB, and if you plug into one of these, the instrument
won't work. You need to plug it into a port that connects to a
root hub. If there are no such ports accessible on your machine,
then I think you are out of luck.
[Technically I can only guess at what's going on. The Spyder 2 seems
to get its toggle out of sync on data reads on Linux. It doesn't
seem to do this on MSWin or OS X though. To work around this I
issue a reset EP before each read on Linux. So a possible explanation is
that the reset EP doesn't propagate through a secondary hub.]
Graeme Gill.
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