M17x freezes totally after disabling stealth mode

Here we go...another big problem with my M17x-R1:

When I turn on stealth mode then turn back to full power mode, my PC totally freezes and nothing respond: CTRL+Alt+Del, mouse, Alt+F4, even the power button dosn't turn it off...

I just formated my hard disk and reinstalled a clean version of Windows 7 with all the latest drivers from Dell's website. So what is the problem with that stealth mode?

EDIT: I have SLI GTX 280M GPU and my pilot version is 195.62. Also, I use Windows 7 64 bit.

EDIT 2: Only nVidia 195.62 drivers are not from Dell website but from nVidia's one.

 

do you have all the cards enabled in BIOS? is your laptop blackscreening? e.g no picture, but it is illuminated?

 

Specs would be nice and driver version. Its tough to diag this without knowing which GPU(s) and which GPU driver.

From what you described, its most likely a driver issue IMO.

 

(How do I delete double post? )

 

Oh sorry, I always forget details... here they are in the first post, see the edit.

No, the screen doesn't go black, it freezes and everything shown on the desktop stay freezed on the screen.

 

Try going into bios and making sure hybrid is active and your not in stealth mode!

 

I just verified it: hybrid is already active and I'm now on full mode. The problem is that I can't swtich correctly between stealth and full mode: when I switch back to full mode, I need to restart the system to unfreeze it, but it switches to full mode anyway.

 

if you start it up off ac power it will switch to inegrated then check your device manager to make sure. turn it off plug it in go into bios and reactivate hybrid see if that helps any

 

Problem solved!

That was the last nVidia driver (195.62). Now I installed the 186.40 version and everything is ok!

Thanks for trying to help me. I hope this will help other people too.

 

I have the same problem with my m17x-R2 with ATI 4870 xFire I think it's the driver but I have the latest from Dell plz help