[sugar etiona] nVidia DRI2 driver bug greys out Browser tabs
Xorg's "nouveau" DRI driver bug makes github.com/login flash twice and then go all gray. The same on sugarizer.org's Login/New user page. This happens with Xorg driver "nouveau" using "nouveau" DRI driver and also with the "modeset" Xorg driver using "nouveau" DRI.
Verified with what lspci calls "NVIDIA Corporation G72M [Quadro NVS 110M/GeForce Go 7300]"
Verified absent on a system using the RADEON Xorg driver and on a system using the MODESET Xorg driver with i965 DRI.
The simplest and least invasive fix is to delete /usr/lib/*-linux-gnu/dri/nouveau_dri.so
For gory details see github.com/sugarlabs/sugar-live-build/issues/20