https://bugs.freedesktop.org/show_bug.cgi?id=82050
--- Comment #61 from Michel Dänzer michel@daenzer.net --- Note that some of the Unreal Engine 4 demos want to use more than 1G of graphics memory (as shown by the GALLIUM_HUD queries requested-VRAM and requested-GTT), so if the GPU has 'only' 1G of VRAM or less, that's a very difficult situation for the graphics memory management code.