title: force low graphics mode in ubuntu 11.04
body: <p>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 ,</p>