Step to reproduce:
Start any Source game.

Game update: AppID 280740 "Aperture Tag: The Paint Gun Testing Initiative",
ProcID 2577, IP 0.0.0.0:0
ERROR: ld.so: object
'/home/kacper/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from
LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
ERROR: ld.so: object
'/home/kacper/.local/share/Steam/ubuntu12_64/gameoverlayrenderer.so' from
LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS64): ignored.
SDL video target is 'x11'

SDL failed to create GL compatibility profile (whichProfile=0!

Could not find required OpenGL entry point 'glColorMaskIndexedEXT'! Either your
video card is unsupported, or your OpenGL driver needs to be updated.

Game removed: AppID 280740 "Aperture Tag: The Paint Gun Testing Initiative",
ProcID 2577 


VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RC410M
[Mobility Radeon Xpress 200M]