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Glxgears is still only up to just below 260 FPS with all that. Some 460 with the Metacity windowmanager. I also managed to crash the DVB (my digital TV driver) after I set Fast Writes, something that has never happened before, so yes, things seem a little less stable with it enabled. I haven't switched it off yet though...
Beryl is very heavy by the looks of it, maybe the new version will be more efficient.
I'm getting about 1600 fps on my 7800GS, with my fully loaded system. One of these days I'm going to shut just about everything down and try it just to see what I could be getting.
Changing options in beryl can have a really huge impact on glxgears fps.
Yes, absolutely. Glxgears is a very poor tool to use as a benchmark, it will drop fps dramatically as the system is loaded.
Monsm: Do you have all the advanced beryl setting set to "Auto'? In beryl-settings, General Options, Main: 'Detect Refresh' should be unchecked, 'Refresh Rate' should be manually set to your monitor refresh rate, 'Sync to Vblank' should be unchecked. That seems to provide the best performance.
I saw another post somewhere about those advanced beryl settings, I might give that another try switching them back to auto. They are on specifics now (GLX binding, force AIGLX, etc). I also deleted my .beryl directory on my user, to reset all the settings. It seemed to help a bit, no particular effect on glxgear rating though.
As you would expect it spin a bit easier without transparency on. I'll have another look when I'm back home from work this afternoon. My ratings are nowhere near yours, so yes, there is something wrong somewhere.
If everything else fails I might rebuild the whole system using the latest Gentoo DVD I downloaded last night...