force low graphics mode in ubuntu 11.04

Question

how to force ubuntu 11.04 to run on low graphics mode ? ( sorry if I posted in a wrong section ) I'm using a p4 machine and xserver stucks at a certain point in everytime , but it's running fine with low graphics mode, since I only do programming stuff , I don't need effects any way ( btw disabling effects at startup doesn't worked either ) but when I start the machine , only sometimes it's asked to run in low graphics mode ,

Answer 1

I figured it out , all I hv to do is , start ubuntu with recovery mode and then select low graphics mode !, any way I think no need of changing the GRUB ...and ubuntu 11.04 not supporting #ATI radeon x300