Asus Ubuntu 9.04 Video Performance Bug is Fixed for 915GM Chipset

I have been following with interest the bug that cropped up in the change from 8.10 Ubuntu to the 9.04 release that severely effected performance of the video subsystem. See Slow performance and tiling issues on i915 the fix is in linux 2.6.28-14.46 (source) in ubuntu jaunty I have installed and tested this kernel and it seems to be OK, no stability issues so far. And performance wise animated icons on the desktop are snappy and responsive instead of laggy and slow motion.

1) Activate the jaunty-proposed archive as described in
https://wiki.ubuntu.com/Testing/EnableProposed

you basically add the following line to the end of /etc/apt/sources.list:

deb http://archive.ubuntu.com/ubuntu/ jaunty-proposed restricted main multiverse universe

2) Update your local package cache using your favorite method:

sudo aptitude update

3) Install the kernel explicitly. The easiest method is to use this terminal command:

sudo apt-get install linux-image-2.6.28-14-generic

4) After installing the kernel, you can undo step 1 -- disable the jaunty-proposed archive by commenting out the line you added in /etc/apt/sources.list --

sudo vi /etc/apt/sources.list

# deb http://archive.ubuntu.com/ubuntu/ jaunty-proposed restricted main multiverse universe

modify grub's boot preference, or hold down the ESC key and manually test the kernel option.

sudo aptitude install startupmanager

sudo startupmanager