This problem is also present on IBM Thinkpad T20 series. I had to change to the VESA driver, on 7.04 (Edgy) as well as 7.10 (Gutsy).
In both cases, I installed using the Alternate-CD
I changed to VESA by booting into text mode and I then gave the command:
sudo dpkg-reconfigure xserver-xorg
This problem is also present on IBM Thinkpad T20 series. I had to change to the VESA driver, on 7.04 (Edgy) as well as 7.10 (Gutsy).
In both cases, I installed using the Alternate-CD
I changed to VESA by booting into text mode and I then gave the command:
sudo dpkg-reconfigure xserver-xorg