About 2 months ago I was able to get the same performance as it was in
Hardy by the following steps:

> 1. install a 2.6.28 kernel (I got the current one from jaunty).
> 2. from the xorg-edgers ppa, install the mesa an required packages, and 
> xserver-xorg-video-intel 2:2.4.97.0+git20081129

Today I've decided (I blame myself for that) to upgrade from xorg-edgers
ppa and hope to get more stable driver and some rendering issues fixed,
but unexpectedly got 45% regression:

glxgears: 1100fps -> 600fps
Planet Penguin Racer (ppracer): 40fps -> 22fps on 1440x900x32

So since I'm running on GEM-enabled kernel/driver/xserver  why we again get 
huge regression after several months of work?
What exactly doesn't allow to keep performance at least on 
xserver-xorg-video-intel 2:2.4.97.0+git20081129 level?

Alter attempt to upgrade video-related packages to Jaunty versions things 
become more horrible:
glxgears: 600fps -> 50fps

I even didn't try to run ppracer, since regression in compiz performance
was eye-sensible (I had to wait 5-7 sec to switch between windows via
Ring/Shift Switcher plugins). Maybe it's due to turned on/off
vblank_mode, but I don't know how to change it globally for all
programs, including compiz.

PS.
I can't downgrade to xserver-xorg-video-intel 2:2.4.97.0+git20081129.
Log of upgraded packages (with versions) attached.

** Attachment added: "intel-upgrade.txt"
   http://launchpadlibrarian.net/21775154/intel-upgrade.txt

-- 
MASTER: Poor graphics performance on Intel
https://bugs.launchpad.net/bugs/252094
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