Y510p(dual 750M's) Auto-Brightness Issue \ ALS \ Adaptive Brightness

So I've searched around and found various fixes to this and none of them seem to work when BOTH 750M GPU's are installed in the machine and it's on battery power. I need to find a solution to this or I'll have to return this laptop because this is incredibly annoying to have this problem every time I unplug this thing from the wall.

The Problem:

When BOTH 750M's are installed in the machine, the Intel Graphics HD software ceases to function and the auto backlight takes over and makes adjustments according to what you're seeing on the screen. An example is if you have a dark wallpaper, this "feature" scales the brightness way down and does the opposite for a bright wallpaper. So if I have a dark wallpaper and then open a windows explorer window the brightness scales way up because the background is white and when I close that way it scales way down because the background is dark again. I'm not sure about everyone else but this drives me insane.

What I've done so far:

- Uninstalled all drivers for NVIDIA
- Removed the 2nd GPU
- Installed Intel's HD graphics driver and turned off the auto backlight under the "Power" area. <-- At this point with 1 750M and the Intel chip, Optimus works and the problem is gone.
- Re-installed the 2nd 750M and powered up <-- At this point the auto backlight still isn't functioning which is exactly what I want to happen.
- Rebooted the laptop and when it turns on the auto backlight is back, SLI is working, the Intel HD graphics program can no longer be opened and Optimus no longer works. <-- At this point the problem is back.

Fixes I've tried:

- Made sure that the adaptive brightness in the advanced power settings is off
- Made a new power profile just in case it was profile related'
- Uninstalled Lenovo Energy Management software(which I might add there is no longer an options area to turn off the auto backlight like in previous models/versions)


Thoughts? Suggestions? Solutions?

UPDATE:

If I open the NVIDIA Control Panel and Disable/Enable SLI, the problem is instantly gone until I reboot the computer. It doesn't even seem to matter if I am turning SLI On/Off, once that apply button is activated and you can click it, the problem is gone. - SO yea....that's getting somewhere I guess.

 

I don't even have the adaptive backlight option on my 510p

Sent from my Galaxy Nexus using Tapatalk 4

 

I don't have dual 750's, so i can't help you.

Sowwy.

 

It's in the advanced power settings and/or the Intel HD Graphics program under "Power" if you're running 1 750M and not 2

 

That would explain it, I've never taken the second 750 out

Sent from my Galaxy Nexus using Tapatalk 4

 

does the auto backlight adjustment not drive you crazy? I can't seem to look past at it as much as I love this thing.

 

/bump for ideas

 

Do you really need the second 750 installed, when you are on the battery? What benefit do you gain? Are you gaming on the battery? If so, how long does the battery last when the second 750 eats up the power?

I think the adaptive brightness is working as designed. With the second 750 installed, you can't enable the Intel HD graphics, or control the Adaptive Brightness even when the laptop is plugged in. Do you have this problem, when you are using both 750's when plugged into the wall? I only ask this because you specifically highlighted battery powered in the OP.

I don't have a Y510p, or even Win 8, so I can't diagnose your problem. I can only ask these questions to get a better understanding on what you think you're gaining, running both 750's on battery. Under Win 7, the Lenovo Energy Management allows me to change the algorithm of the "Smart Sensing". I wonder if the Win 8 version will let you do the same?

 

To be clear, this never happens with the power plugged in, everything is great in that situation.

To answer most of your other questions, yes I want to game on battery...or at least have the option to do so but it's not really a question about gaming. It's just about using the computer on battery **period**. Switching between light dark screens all the time because I have a dark desktop wallpaper really exacerbates the issue and it is really annoying. Now could I just carry around the 2nd graphics card in my bag and insert it when I want to game....sure I guess so, but then I have a big empty slot in the side of the machine when I'm not gaming and I also have to go through the trouble of doing that all the time, which is pretty annoying. It's not hard or anything...I just don't think it should be necessary to do it to enjoy my computing experience.

What's even more irritating about this is that it works perfectly fine when that Intel HD Graphics adapter isn't disabled(which only happens with 1 GPU installed). The problem only comes into play when that Intel adapter is disabled, which happens instantly when you plug in that second GPU and reboot,

 

UPDATE:

If I open the NVIDIA Control Panel and Disable/Enable SLI, the problem is instantly gone until I reboot the computer. - SO yea....that's getting somewhere I guess.

 

You know, the NVidia GPUs put themselves on low-power mode when you're on battery, making the Intel HD 4600 better at gaming when you are on battery, so yeah, like Noak said, you are better off just taking one out.

 

I completely understand that and that's not my concern. It's switching between light/dark pages and having the brightness auto adjust like crazy that's my concern, which you wouldn't experience with just having 1 GPU from what I can see because if I take 1 out the problem is instantly gone. This is obviously a software issue and not a hardware issue because as soon as you hit Apply in the NVIDIA Control Panel SLI area the problem is gone until you reboot the machine.

 

I have the exact same problem on my Y500. Problem is, it's not a SLI version, and there is no integrated intel chip. What do I do?