latitude 640 resuming X

[Jaroslaw Psikuta]

Hey
I have a problem on latitude 640 (radeon 7500) , debian woody, XFree 4.3, 
kernel 2.4.21
When i close my laptop and after while i open it -  screen is not avaible - i 
cant see anything - only blinking stripes. Anyone can me tell why?

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