ISTR 10.5v is about what we set it to. It's annoying for me too, as when the Noble's cooling fans (hovercraft impersonators, more like) kick in I get the screen off/etc behaviour.

The switch-mode PSUs in the player running the HDDs, CPU, etc will run down much lower, 7v would be fine. The only issue is that the 9v (?) analogue linear regulators will also drop out - however, these will only cause - at the worst - momentary distortion, not any sort of CPU upset.

You can change the resistive divider split to set the threshold lower if you want - or just disable the behaviour in the kernel (Mark? )...

Hugo