I'd say that screen capture probably works under X11 no matter what your graphic card is. However this kind of confirm your general feeling: there is no only one blessed and enforced way to do things so everything can break because of combinations.
Examples (I've been on desktop Linux since 2009): shutdown actually reboots except for a few months with some lucky combination of kernel and nvidia driver. The brightness control keys didn't work for at least half of the years. They currently work. All of that has workarounds but I understand that some people legitimately fold and go using another OS.
Examples (I've been on desktop Linux since 2009): shutdown actually reboots except for a few months with some lucky combination of kernel and nvidia driver. The brightness control keys didn't work for at least half of the years. They currently work. All of that has workarounds but I understand that some people legitimately fold and go using another OS.