Comment 29 for bug 542660

I found another easiest way to completly install lucid on IMAC 27 inch.

- Install Karmic using normal CD (not alternate), and pressing F4 with "Safe video mode" activated just before install.
- Go to system > Synaptic. in the search field, type X11. Select all still installed packages (green icon) and choose (in the menu) "Force keeping current version"
- close synaptic, and make a classic update (system > admministration > update manager). Refresh, and "New version lucid lynx available"
- Update with Lucid.

Sometimes, after installed lucid, it will boot on a black screen with safe command line : $inftramp:
just turn off imac, et power it with "ESC" key pressing down ALL TIME do not release the key until lucid boot, but for me that works (strange, isn't it ?).

- After booting lucid, in a terminal, type :

sudo aptitude update
sudo aptitude -f install

- Download (where you want) lastest ati drivers (actually 10.5) here : https://a248.e.akamai.net/f/674/9206/0/www2.ati.com/drivers/linux/ati-driver-installer-10-5-x86.x86_64.run

in a terminal (in the folder you downloaded the drivers) :

sudo sh ati-driver-installer-10-5-x86.x86_64.run --buildandinstallpkg

(--buildandinstallpkg is very important flag, I never getting lastest drivers working without this flag). After install succes, reboot. Everything work amazingly ! and now, you can apt-get update and apt-get upgrade if you want ! Hope this bug will be official fixed, and thanks for all who helped me !