This computer has the M880G with Mobility Radeon HD 4250 and the Mobility Radeon HD 5470.
When I disable the 4250 and keep the 5470 on, the computer will start like it should, but if I try to run them both on enabled the screen will turn black right before login. I can hear the sound and everything, so it's not the computer crashing or anything like that. If I disable the 5470 the same thing happens. The only way the computer will turn on the way it should is if the 4250 is disabled while the 5470 is enabled. So I do get a picture, the computer itself is working, no problem there.
Safe mode works like it should and when the screen goes black I have to use the safe mode to disable the 4250 (and keep the 5470 enabled) to be able to turn the computer back on in normal mode. It's strange though that the computer says that the drivers are working like they should in the device manager, but they're obviously not; when scrolling the picture will lag pretty bad, and even though I've tried probably 10-12 different drivers (new ones, older ones, all kinds), nothing new happens to the computer when I install a driver. It's like the driver isn't "connected" to the hardware like it should, I have no other way to describe it. It installs the driver with the damn Catalyst piece of crap program and tells me everything is working...but no.
I've tried all I could think of - many different drivers, removed the old one and installed the new one instead, installed directx, framework, tried different fixes for scroll lag (which is pointless since this gotta be a driver problem)...I'm all out of ideas.
All suggestions are welcome, since I've tried just about every solution I could find when I googled. And feel free to ask questions - I think I put all the info I have in here, but if something is missing just ask.