Use lsmod under 19 and see which modules are loaded. Also make a copy of /proc/config.gz. Between the two of those you will have information on all drivers present. Then under R21 do the same thing (sorry, you may have to reinstall unless someone else has that info). Post the lsmod while the camera is running on R19.
I am try R21.2 with Logitech 920C and have some to chung646551 issues. It’s looks as UVC halted on capturing (cheese, luvcview, guvcview, nvgstcapture 0.10/1.0 has freezing).
Also, into R21.2 kernel sources all of “.unaligned_dma_buf_supported” is “= false”. And R21.2 release notes has like issue (Release notes, 2.10) but “The issue does not occur after rebooting” don’t work for me =(
And it still doesn’t work. There appears to be a kernel bug, noted on the Wiki at Jetson/Cameras - eLinux.org but it seems rather odd - apparently reporting bogomips is causing guvcview to fail?
So there’s my 2-hour contribution to fixing this problem. Can someone bring this over the goal line? If there’s an NV engineer out with a spare few hours, help would be appreciated. Obviously, cameras are very important for users of the Jetson TK1 board, and it is frustrating that this useful tool - which used to work in L4T 19.x - no longer does.
It appears to be an issue with portaudio. Portaudio is one of the dependencies for guvcview. I have also tested that guvcview works in l4t_r19.3 but not in l4t_r21.1 or 21.2