Fixed waiting for kernel video drivers to load

Have implemented various fixes, including this. See commit:

https://github.com/bkauler/woofq/commit/557d64aa0ba267c131fd5d82b004da40b0b3f0f6

Fix startup tab in Firefox:

https://github.com/bkauler/woofq/commit/c8234323956ac52da179211cfac828883d23bdda

and various nvidia sfs handling fixes.   

Tags: easy