Display problems on Compaq EVO 620c

[Frank Niedermann <fbn@gmx.net>]

Hi,

I have a problem with Linux on a Compaq (HP?) EVO 620c.
I'm using framebuffer for the console and XFree 4.2.1
with 'radeon' drivers. 
Closing the lid will make the screen go completely
crazy (it's filled with lines and everything is shifted)
when I re-open it.

Also the framebuffer console flickers sometimes and I
have to switch to another console (ALT+Fx) and back to
get a clear and readable display.

How can I solve this problem? I have to reboot the
system everytime I close the lid that's really bad :(

Regards,
  Frank