05-25-2012 03:15 PM
My X201 has a two-part problem:
This is best illustrated by a video I took today:
The problem occurs under all power profiles, both on AC and on battery power. Sometimes touching the TrackPoint (or mouse) does not return the display to the previous brightness level. In these cases the image returns but the brightness remains at 0 and I must manually increase it. I don't know whether I'm dealing with two problems or one.
I have all the most recent updates from both Microsoft and Lenovo. I'm running Windows 7 (64-bit) SP1 and Power Manager 6.30. Does anyone have a solution?
Core i7 M620 @ 2.67GHz
8 GB RAM
05-26-2012 11:44 PM
05-27-2012 01:55 AM
Yes, the problem occurs on full battery, AC (with or without a battery installed), and low battery.
I haven't tried uninstalling Power Manager completely; I only tried updating it. I'll try uninstalling and report back.
05-27-2012 07:05 AM
I just uninstalled Power Manager. The problem persists, but without the brightness pop-up. The screen simply goes black (but the backlight remains on). The required period of inactivity seems to be the same, 1 minute.
05-27-2012 08:52 AM
05-27-2012 12:04 PM
I recently updated my BIOS through Lenovo's Software Update. The problem seems unaffected by the update.
The problem hasn't always existed, yet I don't know what caused it. My X201 is still under warranty (with more than a year remaining), but it would be very inconvenient for me to send it in now, as I am working abroad for the next few months.
05-27-2012 10:52 PM
I just reinstalled Power Manager 6.30 and the problem is pretty much the same, with one difference. After one minute of inactivity, the screen still goes black (but with the backlight on), but now the on-screen brightness pop-up indicator doesn't appear. So this leads me to believe that one part of the problem, the improper screen dimming, has been resolved by the reinstallation. It's possible that improper dimming could occur sometime past the one minute mark, but any other time period would be completely arbitrary, so I doubt that.
The screen blackout remains a mystery.