Le dimanche 16 d=C3=A9cembre 2007 =C3=A0 00:12 +0100, Ludovico Fischer a =
=C3=A9crit :
quoted text
> On Fri, 2007-12-14 at 13:46 +1100, Graeme Gill wrote:
> >=20
> > Likely the Eye-One Pro will be the device that gives problems,
> > since it is the one that needs to have two threads accessing
> > different USB end points. The problems occur when the i1pro switch
> > read thread transaction times out.
> >=20
> > Graeme Gill.
> >=20
> Well, I've compiled a version of Argyll on Ubuntu Alpha using all the
> patches from Nicolas Mailhot, ad the last patch from Graeme Gill. If I
> try to use it with the Eye One Pro rev D:
> - I plug the instrument in
> -dispread -?
> Set communication port from the following list (default 1)
>     1 =3D 'usb:/bus0/dev0 (GretagMacbeth i1 Pro)'
> -dispcal -r
> dispcal: Error - Configuring USB port 'usb:/bus0/dev0 (GretagMacbeth i1
> Pro)' to 1 failed with -1 (could not set config 1: Operation not
> permitted)

Please check the device permissions. If it's not right that may indicate
either Ubuntu is not using PolicyKit yet or there is a problem in the
rules file for this device.

quoted text
> -I then run it as root and I can start the measurement normally.
> -after this, the output of ./dispcal -r (non root) becomes
> dispcal: Error - icoms - set_ser_port: port number out of range!
> -while as root, I get the familiar
> dispcal: Error - tcgetattr failed with 'Input/output error'
> Now to be able to run a measurement 'normally' (as root) again, I have
> to either:
> -unplug and plug the USB cable in again
> - run sudo dispcal -r a number of times until it stops giving the
> tgeattr error; sometimes it's only twice, sometimes six; I can't
> uderstand this; maybe it's a function of the time between tries?

It might be worth reporting this to linux-usb@vger.kernel.org to see
what people there think

Regards,

--=20
Nicolas Mailhot