Ubuntu Karmic alpha 3 : eepc hotlkeys - problem with the wireless function touch

Hi,

I have just download the ubuntu karmic alpha 3 and I install it on a Eeepc 1000H.
I was agreably suprised because the hotkeys seems to function, particularly the wifi hotkey (Fcn + F2).
In fact, when I push this hotkey when the wifi network is switch off, the wifi seems to switch on.
But after that, if I push the hotkey another time (in order to switch off from on), a black screen appears and nothing else...

I can't give you extra information about this functionning because when the black screen appears I only have one alternative : to push on the power button during several seconds...

Thank you for considerating my problem.