When I launch TF2 through steam all i see is a black screen. I am running 12.04 on an IBM thinkpad T42.

I have already tried adding

export LANG=C

export LC_NUMERIC=POSIX

export force_s3tc_enable=true

to /usr/bin/steam.

I am in windowed mode, I had the same problems when I was in full-screen. Here are the start up options I had on TF2

-window -dxlevel 85 -console -nojoy

output of lspci, this is the the full output just the output about graphics card

01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV200 [Mobility Radeon 7500]

When I go to Dash ---> Details
it says my graphics are

R100 (RV200 4C57) x86/MMX/SSE2 TCL DRI2

Here is a question about installing drivers for my graphics card. How do I install the drivers for my Mobility Radeon ATI card?