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Lance Corporal
Little update: there were recently some changes in LLVM shader compiler backend for r600g radeon driver as one time Arma was completely unplayable with it (R600_LLVM=1), but current llvm+mesa git master works quite well. They even solved the big black rectangular shadow trailing player`s avatar. The biggest issues now seems to me incorrect LOD switching and poor texture loading performance. As even when I moved Arma to ssd, it does stutter when textures are being loaded. FPS performance wise it is still hopping around 10-15fps on AMD HD4850.
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Why use LLVM backend at all? Had problems with it all over... Why not use fglrx in the first place? Mesa has long way to go.
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Lance Corporal
I can't use fglrx as H4850 is supported only in legacy branch and I don't think legacy works with 3.8.x and upcoming 3.9 kernel which I'm switching to immediately after release. And to avoid shader compilation errors you have tu use LLVM based shader compiler. Stock shader compiler produces unusable graphics. And besides, in mesa/r600g I can do my changes to learn stuff.
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For users of Radeon 6XXX, any luck with Mesa branch sb-r600g-2 by vadimg? There have been many reports of success so far. Not with ArmA though.
If not for the GPU driver issues I'd be using Linux as my only operating system
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