Display issue after fresh re-install of W7, T60p

[sbjoe]

Not sure of the nature of this issue, so I posted this over at the T6x board as well. I don't have any reason to suspect it's a hardware issue so this might be the better venue.

Anyway, long story short, brand new installation of W7. I've installed and run System Update a couple of times. Yesterday, after leaving it running with the lid closed for a little while I came back to find the display dimmed to the lowest setting. Didn't respond to the hotkeys, so I restarted and everything was fine again. Figured I'd neglected to install the hotkeys package, so I went to the lenovo website, downloaded and installed it; everything seemed fine with normal hotkey functionality. Fast forward to this morning, I found the display dimmed and unresponsive to the hotkeys after returning from running an errand.

This is totally new. It wasn't happening before I reinstalled the o/s. It's fine again after restarting, for the moment, but I don't relish the thought of having to restart every time I walk away from it for a bit. Any clues?

thx, -joe