[Bug 359629] Re: [G33] performance drop (20-40fps) in games and compiz after upgrade to Jaunty

[Geir Ove Myhr]

Thank you for reporting this bug. Note that you have mentioned 3 bugs in
the report (low performance, X crashes when you use UXA, and X crashes
when you watch a movie), and each of these needs a separate bug report.
Since the bugs are in different places in the code, they have different
solutions and it will soon be very messy if we try to address all of
them in one report. We will therefore dedicate this bug report to the
performance issue.

Please file the two other bugs separately. For the video playing bug,
hopefully apport will detect that there was a crash the next time you
log in and offer to file a bug report. This will include all kinds of
useful information from the crash. If not, file the bug with ubuntu-bug
the first time you log in afterwards, since the log file Xorg.0.log.old
then may have useful information about what happened. For the UXA-crash
bug you can try the same (but obviously you will have to fix xorg.conf
and maybe restart before you can log in again).

Note that performance bugs like this are one of the hardest kinds of
bugs to work with since there is no obvious thing going very wrong (like
a crash or screen corruption). Right now, the ubuntu developers are
focusing on getting rid of as many of the stability bugs as possible
before the release of Jaunty, so this bug may not get very much
attention before then. Since the next version (Karmic) may use UXA it
would be very nice if we could get the UXA problems fixed, and this may
improve performance as well.

It would be nice if you could test some other games and report here on
how they're doing on your system. Also, please check the performance
troubleshooting wiki page
(https://wiki.ubuntu.com/X/Troubleshooting/IntelPerformance) and report
here if any of the obvious problems there apply to you (like the
/dev/dri/card0 special file).

** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: New => Confirmed

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[G33] performance drop (20-40fps) in games and compiz after upgrade to Jaunty
https://bugs.launchpad.net/bugs/359629
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