Greetings all; I am trying to make a machine vision kit of modules work in linuxcnc, which uses a lot of python for scripts and gui controls in the user interface.
This is on a Ubu 10.04.4 LTS install, which because linuxcnc is intimately married to an RTAI equipt kernel version, has not been updated past 2.6.32-12x-RTAI. Those patches are very invasive but a 3.8.something version is being worked on as we speak. But in the meantime, in an effort to debug the failure of the camera application to work WITH linuxcnc, I ran the debug level up to maximum to see if I might find the first point of failure, and get this on the console when linuxcnc is launched from the cli: ================ Xlib.protocol.request.QueryExtension parse error? unable to instantiate [/dev/video0] ================ Then it reverts to the normal traceback reporting the same thing but quoting the line numbers of the two scripts that led to the failed call. /dev/video0 exists, is created when the usb cable from the camera is plugged in, and the program "cheese" can display this cameras output just fine using /dev/video0 as the src device. When cheese runs this camera, there is a several second delay while cheese is apparently talking to it to establish the correct output format before cheese starts displaying its output, so I am wondering if an initialization time delay might be the fix, but I haven't a clue about how to go about that in python despite my copying the list for what, a year or more now? So, where should I start? Heck, maybe I might learn a bit of python while running this one down. ;-) Thanks all. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> >From 0 to "what seems to be the problem officer" in 8.3 seconds. -- Ad for the new VW Corrado A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. -- http://mail.python.org/mailman/listinfo/python-list
