Does it happen with other USB cameras? For example, a UVC compatible webcam (big list of supported devices here: http://www.ideasonboard.org/uvc/ )? Perhaps the problem is just the IIDC over USB driver on ARM? Do you get similar errors on an x86 PC? - Eric On Wed, Nov 24, 2010 at 9:06 PM, Andrew Harris wrote: > Hi - > > So after some more tinkering, the problems I have been having with > my Point Grey Chameleon on the beagleboard xm don't have anything to > do with the camera. The problems seem to be the beagleboard xm and > it's USB interface. I am getting messages like: > > "[11646.000000] usb 1-2: device descriptor read/64, error -71" > > which I thought were due to the camera, but I have plugged in > another device and I get the same messages. It seems like keyboards > and mice and other simple things work fine, but "more complex" things > for some value of complex seem not to work on the beagleboard xm. > > The problem is somewhat intermittent -- I've got at least two > bagfiles that show camera1394 working OK on the beagleboard xm with > the Point Grey Chameleon doing IIDC over USB. But I am certainly not > going to use this set up for an autonomous robot at this point! > > regards, > -andrew > > On Tue, Nov 23, 2010 at 1:28 AM, Andrew Harris > wrote: > > On Mon, Nov 22, 2010 at 11:31 PM, Eric Perko > wrote: > >> There is a wiki page that talks about some of the alignment issues that > have > >> come up with ROS on ARM. > >> http://www.ros.org/wiki/eros/alignment (take a look at the linked > ticket as > >> well). Also take a look at this > >> thread: > http://code.ros.org/lurker/thread/20101122.232925.f0d885ce.en.html and > >> perhaps try the -msoft-float option and see if that changes anything. > > > > Hi Eric, > > > > Thanks for the suggestion. I applied Josh's patch, and that seems > > to have fixed the problem within dynamic_reconfigure. I think > > camera1394 might be working now -- I'm getting some intermittent > > results because I think my camera may be occasionally exceeding the > > power limits of the USB host bus on the beagleboard. I am going to > > try connecting the camera to a powered hub and see if I can get more > > reliable results. Thanks to you both again for your help. > > > > regards, > > -andrew > > > _______________________________________________ > ros-users mailing list > ros-users@code.ros.org > https://code.ros.org/mailman/listinfo/ros-users >