I have an I7-3770k with HD4000 GPU. When I play HL2 or Portal (native Linux on Steam), I see an almost black screen. In portal it seems like I see some reflections. In HL2 every texture is black, exept the 'sky'. No color, no lighting, just black! (The into with the 'talking head', I seem to have a lot of reflections in the face, but again, no textures!).
I don't have the problem on CS:Source.
My system is Ubuntu 13.04, 64 bit.
Does anyone have similar experience?