Dell Lattitude 610 goes blank after closing / opening laptop

A minor issue, but maybe someone had it as well. My Dell Lattitude 610 goes blank when I open the laptop after I have closed it.

Workaround 1: Dont close your laptop... :-)

Workaround 2: Not very pretty, but works for me: Alt + Ctrl + F1 and then back to the X-session with Alt + Ctrl + F5

My first experience with Knoppix (I been using Ubuntu and PuppyLinux for some time) and I was very impressed. Knoppix 6.1 is running like a fox on the machine, WLAN was "too" easy to configure with WPA. Just punch in the WPA code and we're up n running. Nice! Still, Ubuntu is my favorite full featured system, and Puppylinux has not yet let me down with old hardware or for Anti virus scan on Windows-machines.

/Peter

1. Knoppix 6.01 works ok on my Dell D610.
2. Only point is the 'persistent feature', I have not got it to work (me probably!).
3. turned off 'Compiz" (?) I tend to use only one desktop

Many thanks to Klaus for his very good work.
PS I use Knoppix 3 , 4 and 5 as well on older different machines back to single pentium.
I have used Knoppix 4 to rescue other persons windows machines so I have a great deal of well placed trust in Klaus.