Re: Radeon fglrx performance gone in Testing AMD64
14/04/2011 09:26, Joost Kraaijeveld wrote:
> Hi,
>
> Somewhere this week the video card performance dropped spectacularly.
> All drag and drop operations and (web) page scrolling are suddenly
> excruciating slow. Glxgears went from > 5000 to 60 frames per second (I
> know, glxgears is no benchmark). Also my screen is not painted
> correctly: it seems that the system "forgets" to paint all the pixels
> and I am forced to change the size of my windows to get it repainted,
> even if I have enabled the "Tear Free Desktop" option in the Catalyst
> Control Center.
>
[snip]
> TIA
>
Hi, the "tear free desktop" feature enables automatically the vertical
refresh sync, that's why glxgears is giving you roughly the same
frame-rate as your display refresh frequency. This is not an indication
of an absolute drop in performances.
You don't tell us which desktop environment you are using, but I know
that this tear-free "feature" is inducing rendering bugs with kwin (kde)
compositing, sometimes simply crashing it, and it may be the same with
others D-E.
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