I have had same problem on fedora 8 _64. For temporary solution I commented-out all occurences of errno_exit ("VIDIOC_DQBUF") in /opencv/otherlibs/highgui/cvcap_v4l.cpp and rebuild opencv. See also: http://article.gmane.org/gmane.comp.lib.opencv/7660/match=vidioc%5fdqbuf
I have had same problem on fedora 8 _64. For temporary solution I commented-out all occurences of errno_exit ("VIDIOC_DQBUF") in /opencv/ otherlibs/ highgui/ cvcap_v4l. cpp and rebuild opencv. See also: http:// article. gmane.org/ gmane.comp. lib.opencv/ 7660/match= vidioc% 5fdqbuf