compiz team mailing list archive

[Daniel van Vugt <vanvugt@xxxxxxxxx>]

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

As these performance issues are often specific to a graphics driver, we
should initially focus on the graphics hardware this bug was reported
on:  Intel Corporation 2nd Generation Core Processor Family Integrated
Graphics Controller

The intel graphics driver documentation suggests this might be caused by
the TripleBuffer configuration option which is enabled according to your
log files. It is in fact enabled on all intel graphics systems by
default.

It's possible and even likely that compiz in Ubuntu 11.10 is taking
slightly more time per frame than 11.04 did, and so is not meeting the
deadline to achieve full frame rate. I suspected this was happening on
my machine a few days ago (with the same hardware) after I upgraded to
11.10.

Please try disabling TripleBuffer by setting (something like) this in
/etc/X11/xorg.conf:

       Section "Device"
         Identifier "devname"
         Driver "intel"
         Option "TripleBuffer" "false"
       EndSection

If that fails, please also try adding:

         Option "SwapbuffersWait" "false"

For more information, run: man intel

If the above options fail to improve anything, please attach new copies
of your /var/log/Xorg.0.log file when the options are set.

Finally, your logs show that you have not yet upgraded to the latest
compiz 0.9.6+ which comes with Ubuntu 11.10. Please try upgrading your
packages/system to match the final version of compiz that was released
in Ubuntu 11.10.

** Changed in: compiz (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/861061

Title:
  compiz 3d performance regression

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