I can't start Ubuntu after adding this line:
# DisplaySize 270 203 # 1024x768 96dpi
# DisplaySize 338 254 # 1280x960 96dpi
DisplaySize 338 270 1280x1024 96dpi
# DisplaySize 370 277 # 1400x1050 96dpi
# DisplaySize 423 370 # 1600x1400 96dpi
How do I change it back? I get something like can't start X server