I thought JetPack contained all the OS and the software. I stumbled upon this article from JetsonHacks:
What suprised me was under the “Notes” section, I see:
“Most people do NOT have both the JetPack installed and the source built OpenCV on their system. Some people have noted success using both however, check the forums.”
Do people actually somehow use Xavier without flashing and installing Jetpack at all? Or is it that people install Jetpack, and then build OpenCV custom after uninstalling the OpenCV that comes with Jetpack?