On 7/20/2011 11:34 AM, Marco Trevisan (Treviño) wrote:
2011/7/20 Jay Taoko<[email protected]>:
Hello
Last cycle it was noticed that there is a problem when using the fglrx
driver and Compiz Vsync. I did a few experiments today with an AMD GPU and
the fglrx driver. Activating Compiz Vsync option negatively impact Unity's
rendering performance.
Not only on performances: see [1].
[1] https://bugs.launchpad.net/bugs/762918
From what I could gather, Compiz uses the GLX_SGI_video_sync extension
to implement its VSync. Normal OpenGL applications typicaly use
GLX_EXT_swap_control. I wonder if anything prevents Compiz from using
this extension.
I have been running Compiz withits VSync feature disabled. I will try
test it with VSync enable and see if I get a problem similar to the bug
report.
Jay
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