If the check for GL_MAX_TEXTURE_SIZE doesn't fail for the radeon card in
question (where it is supposed to fail), it will probably be necessary
to write a tiny test program in C which tries to allocate a
GL_PROXY_TEXTURE2D of the required size. The GL_MAX_*_SIZE constants are
only rough indicators of the real texture capabilities at runtime. In
any case checking GL_MAX_3D_TEXTURE_SIZE is definitely broken.

It would be great if the original reporter could confirm whether the
patched script still properly disables compiz for her/him. But I think a
new upload is in order regardless of this particular problem. The patch
definitely breaks more than it fixes. I believe only very high-end cards
-- or alternatively just lying drivers -- will be able to get past this
test as it is now.

-- 
need to add max texture size check
https://bugs.launchpad.net/bugs/124519
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