Re: Qt + opengl+opencv black screen
It probably GL extensions issue.
Have a look in the code which GL extensions are used, and run a GL extension info tool on your the netbook, and see if the graphics card there support these extensions.
Intel graphics chips support GL extension very poorly.
Do you write clean code? - if you are TDD'ing then maybe, if not, your not writing clean code.
Watch these videos, and read his books they are must if you want to write clean code:
Recommended off-line reading Qt:
The Foundations of Qt Development (ISBN: 1-59059-831-8)