Hi Eric, I don't currently have a UVC webcam, I'll try to dig one up. I've been running the same camera with an EEE pc (intel atom) for a year now, with the camera1394 node working well with no troubles at all. -andrew On Wed, Nov 24, 2010 at 9:16 PM, Eric Perko wrote: > 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 > > > _______________________________________________ > ros-users mailing list > ros-users@code.ros.org > https://code.ros.org/mailman/listinfo/ros-users > >