No, it should bring up the display and work. Can you post your Xorg.0.log file so I can check to see what errors might have been reported? Also, it's worth trying a few other modes to see if they'll come up. It's still a bit twitchy for me, so additional information would be useful.
Also, turn on
Option "ModeDebug" "YES"
in your xorg.conf "Device" section as that will output a few other details.
No, it should bring up the display and work. Can you post your Xorg.0.log file so I can check to see what errors might have been reported? Also, it's worth trying a few other modes to see if they'll come up. It's still a bit twitchy for me, so additional information would be useful.
Also, turn on
Option "ModeDebug" "YES"
in your xorg.conf "Device" section as that will output a few other details.