I recently installed steam on ubuntu 12.10 and when i try to load tf2 this error appears: "Required OPenGL extension "GL_EXT_texture_compression_s3tc" is not supported. Please install s3tc texture support


you can try the trick described in this question, open a terminal and before running steam force the load of the extension so:

force_s3tc_enable=true steam

This if steam is the command from the terminal to run it ;)

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