compiz team mailing list archive

[Kenneth Russell <kbr@xxxxxxxxxx>]

While I agree that Unity is the largest problem, I do not agree that it
is the only problem. Compiz is definitely imposing overhead, and causing
incorrect reporting of OpenGL applications' performance. With gnome-
shell+compiz, glmark2 thinks it is running at >170 FPS, but it is
definitely dropping frames. If it were actually running at 170 FPS then
it wouldn't be exhibiting the jerky animation it does on screen. Perhaps
compiz is competing for the GPU's fill rate with other OpenGL
applications on the system, but if this were true, then the app
shouldn't be able to provide frames to compiz at a rate faster than the
screen refresh rate. The fact that compiz doesn't appear to be imposing
the GLX swap interval on OpenGL applications is causing Chrome's GPU
accelerated rendering path to not function correctly. Chrome relies on
the swap interval to throttle its rendering.

According to synaptic, unity 5.12-0ubuntu1.1 is already installed, and I
just rebooted to make sure; however, my installation clearly doesn't
have the fix you describe. Could you please point to a .deb I can
install manually? Google's modified Precise distro doesn't allow PPAs to
be added.

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https://bugs.launchpad.net/bugs/988079

Title:
  [nvidia] Dismal compiz performance on HP Z600 with 30" landscape
  monitor

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