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I'm actually experiencing a similar problem with OpenCV 3.2.

I had the exact same problem on Ubuntu 16.04 Minimal. So yesterday I switched to Debian Jessie and now the problem has evolved to the next stage ;)

Here's what you could try (what I did to troubleshoot and test).

sudo apt-get install fswebcam

After that, run this and check if it works:

sudo fswebcam -r 640x480 --jpeg 95 -D 1 test.jpg

The fun thing about fswebcam is that it actually gives you some nice debug information right there ;) So, hopefully, that program is able to grab the picture and save it for review. It was for me. If it still doesn't work, you might want to rebuild your OS, or switch to something else.

Now I went back to OpenCV and found out that I still get Select Timeout, but only once. After the timeout, I immediately get correct grab.

I'm actually experiencing a similar problem with OpenCV 3.2.

I had the exact same problem on Ubuntu 16.04 Minimal. So yesterday I switched to Debian Jessie and now the problem has evolved to the next stage ;)

Here's what you could try (what I did to troubleshoot and test).

sudo apt-get install fswebcam

After that, run this and check if it works:

sudo fswebcam -r 640x480 --jpeg 95 -D 1 test.jpg

The fun thing about fswebcam is that it actually gives you some nice debug information right there ;) So, hopefully, that program is able to grab the picture and save it for review. It was for me. If it still doesn't work, you might want to rebuild your OS, or switch to something else.

Now I went back to OpenCV and found out that I still get Select Timeout, but only once. After the timeout, I immediately get correct grab.

# rmmod uvcvideo
# modprobe uvcvideo quirks=128 nodrop=1 timeout=6000