Fedora 11 preview with updates, blank screen problem

[helloworld1]

I don't know to reproduce this problem. But it occurs randomly, mostly when I am typing.
The screen suddenly turn blank like running the "xset dpms force off", If I press the button or move mouse, it will come bright again.
My laptop is Thinkkpad X200 with Intel 4500HD graphic card.

[youknowwho]

Hi, well...I have the same problem, on Intel hardware as well, I have a Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller, on a Toshiba A205, but in my case, the screen flashes to black randomly and only lasting one or two seconds, then coming back to normal...anybody else having this problem? Should I file a bug report?
I have a fully updated system as of 05/09/09 and a Linux 2.6.29.2-126.fc11.i686.PAE #1 SMP Mon May 4 04:48:39 EDT 2009 i686.
Thanks in advance, and sorry for any grammar mystake, it's not my native language.

[durangowildlife]

Same issue here on a Dell 630 with Quadro NVS 135M. Currently running 2.6.29.2-126, noticed it with previous kernels. Using TwinView and both screens cut off completely. Will see what happens when I turn screen dimming off in power settings.

[asymptote]

I have the same problem - tested on the system below in my sig and also on a Nexlink D945GCCR and on a Dell 8400. No matter where I plug in the hard drive the screen powers off after like a minute. Is there some type of output or debugging I can provide?