BTW, regarding the HW problem... does anybody have any clues to repair it?
It would be good if NVIDIA had a diagnosing tool to answer these questions (i.e. to tell which parts of the GPU are failing, or whether the problem is external, etc).
In my particular case, the laptop is out of guarantee and so far the only problem is vdpau/dxva acceleration not working (yes, in Windows too, as far as I tried).
I'm not going to send the laptop for repair/replacing as this would cost me almost the price of a new laptop.
So, I was wondering, if the cause is anything easy repaired like a bad capacitor failing, or some bus not receiving enough power due to a short circuit in other place, or something easy like these (which doesn't require replacing the entire GPU), then I could try to repair it, as I'm an electronic hobbyist.
But I don't know where to start. I don't even know how the GPU IC looks like (e.g. what symbols are printed on it, what size I should expect, how far/near from other parts is,etc).
I even have the service manual, but it's confusing as hell.
Or maybe I should forget this problem and live with it.