You have been subscribed to a public bug:
Using the latest Ubuntu 12.10 build, the system stutters (to the point
that the mouse doesn't move for a few milliseconds, very noticeable and
annoying) when using the latest AMD Catalyst driver (fglrx 9.000 from
the quantal repository), Google Chrome and overwriting the driver
software blacklist in about:flags (normally it should be accelerated by
default anyway, it does with the driver from AMD.com and Ubuntu 12.04).
You you hover over some links, like the ones on engadget.com on the
right (recent reviews), it stutters A LOT. When you go to about:flags
and check "disable GPU Vsync" it runs smoothly and perfectly fine like
it did with Compiz 0.9.7.x.
Also while hovering/moving over links (with Vsync on/off), CPU usage
goes up till 60% on my quadcore, but that's another story and has always
been like that).
I know there's one more Vsync related fix coming with the final compiz
0.9.8.4 release, but I think I've read it only matters for nVidia.
** Affects: chromium-browser
Importance: Undecided
Status: New
** Tags: 12.10 chrome compiz fglrx quantal vsync
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system lags with fglrx, Chrome and Vsync
https://bugs.launchpad.net/bugs/1058636
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