YESSS!~!!!!
I FINALLY got dapper xubuntu to boot into graphical mode…

The ONE thing I had to change to get this working on my IBM T20 laptop is manually set the amount of video memory on my system…
To do this:
- When the computer is booting up, enter the GRUB bootloader and select the “recovery” option.
- After the system is fully loaded and you are presented with a command prompt as root, type “dpkg-reconfigure xserver-xorg” to enter the configuration utility.
- Have the utility attempt to autodetect the card (for the T20, it should autodetect to the Savage driver).
- Continue through the screens selecting the default values until you reach the screen telling you to “Enter the amount of memory (in kB) to be used by your video card.” on the line, type “8192”, because the T20 savage video card is an 8MB card… 8 x 1024kB. This is the critical step in getting the graphics to load correctly!
- Continue selecting default values until you reach the screen where you must select “Easy” “Medium” “Advanced” or something regarding the way you will set the refresh rate. Select “Medium”, and then on the next screen select “1024 x 768 @ 75 Hz”
- For color depth, select “24”.
- Continue hitting “OK” through the wizard until you are dumped back to the command line. Type “telinit 6” to restart the computer. Let the computer boot completely, and you should see graphics!!!
That’s it! Hopefully this helped somebody whose video memory wasn’t detected correctly.
from http://ubuntuforums.org/showthread.php?p=1191311#post1191311
1. 복구 모드로 부팅을 한다.
2. 쉘에서 dpkg-reconfigure xserver-xorg 을 입력
3. x설정 메뉴가 뜨는데 이곳에서 t20의 스펙대로 적어준다. 위에 적은것 처럼 메모리는 8메가 해상도는 1024×768 @75hz 으로 설정
4. 재부팅 하면 gdm이 벋어버리는 일이 발생하지 않는다~!