(from https://launchpad.net/bugs/72365) The S3 Savage video hardware does not support "non power of two textures" and compiz therefore fails to start. Compiz should have the ability to use only POT textures.
Assuming that textures are the same size as the pixmaps being bound to them makes things a lot more convenient and removes tricky special cases that plugins would have to be aware of. GLX_EXT_tfp requires npot textures so if they are not available compiz would have to MakeCurrent-CopyTexSubImage the pixmap content, which is slower and requires more video memory. Most hardware that doesn't support npot textures is already low on video memory so even if compiz would resort to pot textures if needed it might not be usable anyhow.
Sniff, no compiz for me? https://bugs.freedesktop.org/show_bug.cgi?id=8758#c1 Yes, I have only up to 32 MB of video memory. But shouldn't there be some fallback, like compiz starting but with reduced bling?
This error occurs with more than just the Savage card... if some plugins (ie 'reduced bling) didn't work on POT that would be fine... but having it fail completely in annoying...
Sorry about the phenomenal bug spam, guys. Adding xorg-team@ to the QA contact so bugs don't get lost in future.
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