IBM G40 laptop screen goes blank

[Indy452]

Running Ubuntu 8.4.4 on an IBM G40 P4 3.0 with 512 etc...

No problems other than one.....When I'm using the OS in any state and I close the lid and lift it back up the screen goes blank and nothing I try will bring it back. The only way to get back to my OS is to do a dirty shutdown and restart and hope that I'm not dumb enough to close the screen.

Is this a setting issue with my IBM (bios) or with my OS (Ubuntu)??

Thanks for the advice..

[Indy452]

Anyone??