Brightness problem with Timeline 4810TZ

Okay, the problem is this:

When I unplug (go to battery power), the green battery-light-led goes on and overrides the brightness-settings I do with Windows 7. This means whenever I plug-in or plug-out the brigthness gets reset to some value that Acer thinks is 'right' for me. I would like to decide myself what is right for me, but can't find out how.

What makes it worse is that at first it works like:

Unplugged: 30% brightness
Plugged-in: 40% brightness

Which is reasonable. However, after pluggin-in/out a few times, it goes all screwy. For example: unplugged becomes 50%, plugged-in becomes 10%, or some other seemingly random non-sense-making values. So, I would like to get rid of this.

Pressing the green led when it's on makes it go off and seems to give brightness-control back to windows-settings. However, as soon as pluggin-in and plugging-out again, the green led comes on again. Argh.

I read some other threads about similar issues, but people would always have Acer ePower Management or something installed. I do not. This happens on a fresh clean install of Windows 7. Bios is up-to-date. Happens in every power mode (saver/balanced/performance).

I actually tried to install Acer PowerSmartManager (as it's listed on their support site for this model), but that doesn't give any control-options either and seems to hook into more system-stuff and doing more things I don't want it to.

I also installed Launch manager, that gave me no controls either. Only a fancy on-screen-icon when pressing the green led-thingy to turn it off/on.

Does anybody know a solution? I want the green led to stay off, so it doesn't mess up the brightness-settings.

 

Windows 7 power options should cover this. Go through the advanced settings and remember to click APPLY

 

Oh oh, you seem to think I'm a brainless n00b Maybe I was not clear. I did set the settings in the power options the way I want them to and I did click 'save changes'. For example, I set the brightness to 50% for both plugged-in and plugged-out, for all the power profiles (saver/balanced/performance). When I go back to the settings, I can confirm that thay are set that way. It is not a matter of 'forgetting to hit apply', lol.

When I plug-out, the brightness goes to 30%, when I plug-in to 40%. Plug-in/out a couple of more times, and you get values like 90% for plugged-out and 60% for plugged-in. All seems pretty random.

So somehow, these settings are getting overridden by something else (Acer) as soon as I un-plug.

Is there anybody else with a 4810tz? Do you not get anything weird like this?

PS: I have another Acer-laptop (1810tz), which does not have this problem.

Edit: I just un-plugged the 4810, so the green-leave-led went on and it went to like 40% brightness. Then I pressed the green-led and it went to 50%, pressed the green-led again, it went to 60%, pressed again went to 70%, etc. All the way to 100%.. then went to 0% again and then 30%, 10%, 20%, 0%. Turning off/on the green-led-thing makes the brightness act totally weird... :<

 

Try setting Adaptive display "off" in Advanced settings in Power options, might work.

 

Sorry, please let me know how you fix it.

 

Ill take a look at the adaptive display-setting.

I installed powersmartmanagement and at least that seems to take care of the weird randomness. It now listens to the settings I set for plugged-in and seems to use its own settings for plugged-out. But at least it's consistent now instead of random weirdness.

 

I didnt find an adaptive-display setting, do you mean dimming? That's turned off.

Anyway, I still can't control the display when plugging-out, but at least it's acting consisently now and it lets me control the plugged-in setting.

 

It is in Control Panel-> Hardware & Sound.