Misspelling the video driver name results in a thrown message now small refactorings, list of known drivers is an attr set, optional is imported from lib etc
Misspelling the video driver name results in a thrown message now
small refactorings, list of known drivers is an attr set, optional is imported from lib etc

git-svn-id: 71c8032c709790ec749031c4215f8515ac00dc5a@13048 70bd8c7a-acb8-0310-9f0d-9cc1c95dcdbb

bnordgren/nixos,bnordgren/nixos,bnordgren/nixos,bnordgren/nixos,bnordgren/nixos