Comment 31 for bug 124519

I think I have found a fix for the issue of the garbage at the right/bottom when forcing compiz to start despite the failed texture size. By setting a virtual size I manage to use my preferred resolution (1280x800), without needing to revert to 16bpp:

Put this in your "Screen" section in /etc/X11/xorg.conf:

        DefaultDepth 24
        SubSection "Display"
                Depth 24
                Virtual 1280 800
                Modes "1024x800"
        EndSubSection

Values may differ according to desired resolution and maximum texture size (1024 in my case, hence I choose 1024x800 for the modeline.

Though untested, I think compiz should in this situation start cleanly without the SKIP_CHECKS=yes option enabled.