For 12.10:
It works for me!! And here is the how-to which I created for you:
Pre-Install:
Three terminal-commands:
sudo apt-get install build-essential cdbs fakeroot dh-make debhelper debconf libstdc++6
sudo apt-get install dkms libqtgui4 wget execstack libelfg0 dh-modaliases
sudo apt-get install linux-headers-generic xserver-xorg-core libgcc1
Optional if 64 Bit - two terminal-commands:
sudo apt-get install ia32-libs lib32gcc1 libc6-i386
cd /usr ; sudo ln -svT lib /usr/lib64
Download from this direct-link:
https://launchpad.net/~andrikos/+archive/ppa/+sourcepub/2755647/+listing-archive-extra
the files and this two .deb packages into an empty folder
xserver-xorg-video-intel-dbg_2.20.0-0~andrik1_XXX.deb
xserver-xorg-video-intel_2.20.0-0~andrik1_XXX.deb
where XXX should be your architecture identifier (x86 or amd64)
Execute the following two terminal-commands in the folder with downloaded .deb files:
sudo dpkg -i xserver-xorg-video-intel*.deb
sudo dpkg-reconfigure Xorg
Then reboot your machine
Note - this is from the PPA:
https://launchpad.net/~andrikos/+archive/ppa/+packages?field.name_filter=&field.status_filter=published&field.series_filter=quantal
Important - Today I got a security-update for "xserver-org" form the official Ubuntu repositories which crashed my system again (no login screen). Then I installed the newest two xserver-org-video-intel*.deb's (downloaded and installed as described above) from the PPA https://launchpad.net/~andrikos/+archive/ppa/+packages?field.name_filter=&field.status_filter=published&field.series_filter=quantal again. You can also add this PPA on your system for preventing this issue. For me, this PPA has too much other packages, so I will do it (downloading the two .deb-files and installing them) manually. An other solution is, to de-select the "xserver-org"-packages if there are official Ubuntu security updates available.
Installation:
Get the current ATI Catalyst driver e,g 12.11 Beta (I have tested it with this release):
wget -c http://www2.ati.com/drivers/beta/amd-driver-installer-catalyst-12.11-beta-x86.x86_64.zip -O catalyst-12.11-beta-x86.x86_64.zip
Unzip the .zip and make it executable. Then go to the folder with the unzipped .run-file in terminal and type:
sudo sh ./amd-driver-installer-XXX.run --buildpkg Ubuntu/quantal
Replace XXX with the correct name of the file
Install the created .deb-files with the following terminal-command in the current directory:
sudo dpkg -i fglrx*.deb
Post-Install:
Enter the terminal command
sudo aticonfig --initial -f
Reboot your system
sudo reboot
optional - fixing the bug for direct rendering on the integrated card:
gksu gedit /etc/X11/Xsession.d/10fglrx
Add the string "/usr/lib/x86_64-linux-gnu/dri/" on your 64Bit system that the line finally looks like this:
LIBGL_DRIVERS_PATH=${LIBGL_DRIVERS_PATH}:/usr/lib32/fglrx/dri:/usr/lib/x86_64-linux-gnu/dri
Add the string "/usr/lib32/dri/" on your 32Bit system that the line finally looks like this:
LIBGL_DRIVERS_PATH=${LIBGL_DRIVERS_PATH}:/usr/lib32/fglrx/dri:/usr/lib32/dri
Links:
http://ubuntuforums.org/showthread.php?t=1930450
http://ubuntuforums.org/showthread.php?t=1930450&page=51
http://www.upubuntu.com/2012/10/install-amd-catalyst-1211-beta-driver.html
My Scripts for Switching
Script for High-GPU-Mode:
#!/bin/bash
# Activate discrete GPU (High-Performance mode), must re-start X to take effect
sudo aticonfig --px-dgpu
sudo restart lightdm
Script for Low-GPU-Mode:
#!/bin/bash
# Activate integrated GPU (Power-Saving mode), must re-start X to take effec
sudo aticonfig --px-igpu
sudo restart lightdm
Script for showing current GPU-Mode:
#!/bin/bash
#Show current GPU (High- or Low-Performance mode) as notification
aticonfig --pxl | while read SPAM_OUT; do notify-send "$SPAM_OUT"; done
Note:
If you have always problems after the execution of a Switching-Script, make a restart of your system (and not only a re-login).