I've been running Windows 7 on my Thinkpad X200 Tablet PC for a while now. Things have been great, but the LCD display brightness control doesn't always work when I resume from Sleep (standby) or Hibernate. If I reboot, then I regain brightness control. Since screen brightness affects battery life, this is a very important thing to control on any mobile device.
Well, I've found a fix for this. Open Windows Mobility Center and keep it open all the time. When I resume from Sleep, Windows Mobility Control remains open in the background and I'm able to control my screen brightness. I'm not entirely sure why this works, but it's a temporary fix until Lenovo issues correct drivers and system utilities for Windows 7. I've been told that this screen brightness control issue is a common problem on other Thinkpad models running Windows 7. So, here's my contribution to those of you running Windows 7 on your Lenovo Thinkpads.
I too am having similar problems on a 6515b HP (Win7 build 7100). Keeping the mobility center open all the time cannot be a permanent solution to this bug. Hope MS already knows about this. I hear it has been corrected on more recent builds, not sure though.
ReplyDeleteI have the same problem on a HP NX7300 (Intel GMA 945 gfx). I can get the full brightness back by unplugging and re-plugging the power cable from the back of the laptop.
ReplyDeleteWindows 7 RTM
Has anyone seen a Microsoft thread for this problem??