mplayer problems with i740 graphic card

[Ye Fei <sjtu_yf117@sina.com.cn>]

hi,
  I recently installed a debian tesing in a old computer
  with i740 AGP graphic card. However I encountered problems
  when playing avi file with video driver xv, which leads to 
  a blue screen without any figure on the screen.

  any ideas?
  thank you.
yf