https://bugs.kde.org/show_bug.cgi?id=195057--- Comment #8 from Thomas Lübking <thomas luebking web de> 2009-06-10 18:39:43 ---
info:
gddr2 is actually faster than ddr2, but your clock rates are pretty low.
i however limited the RAM clock to 270 and the GPU clock to 300 MHz on a
7600gt/AGP8 and the performance (though less) was still ok (512MB VRAM, though)
in general: if you have slow or limited VRAM, first thing you should do is make
sure that blurring is OFF!
but as this seems to be an nvidia specific issue (given intel works and the
systems are comparable otherwise) and somehow related on massive texture
allocations you should ensure that
- you use "Texture from Pixmap", NO SHM or even the fallback...
- few VRAM? don't use trilinear filtering, bilinear is cute enough
- enable direct rendering (this holds for more or less all gpus, but ...)
nVidea related stuff:
- ensure your GPU uses the "proper" texture allocation strategy
"nvidia-settings -q InitialPixmapPlacement"
-> Attribute 'InitialPixmapPlacement' (midgard:0.0): 2.
if not: "nvidia-settings -a InitialPixmapPlacement=2"
the effect applies almost immediately (you can try other settings, though)
- check the nvidia setup dialog "nvidia-settings"
in "OpenGL settings" check "allow flipping" (and usually you want "sync to
vblank" as well), maybe drag the slider from quality to performance (the driver
will then do some tricks on e.g. texture filtering - i don't know if this helps
in this case, though)
- in "antialiasing settings", just turn everything OFF (afair you'll have to
restart kwin to trigger this. if you need these settings to support e.g. older
games, you can set environment variables for this before running the game and
the driver fill change settings just for this game)
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