02-27-2019 07:52 AM
Yes, disappeared from my system too, but it was there before & I had to turn it off. Search the web and you see that it used to be in the Windows Advanced Power Settings too, but looks like it disappeared. It also appears in some versions of the Intel HD Graphics software under "Power". So best to check these other places too.
Just because the setting has disappeared, doesn't mean adaptive brightness is not happening!
Maybe Lenovo removed it because of too many complaints - a case of good idea but not well implemented and too many customer problems.
02-27-2019 08:06 AM
05-07-2019 09:20 AM
I'm still having the issue and see no option like discussed above in the Vantage settings. Anyone else find a solution that works besides restarting the computer? It's very annoying.
05-07-2019 11:52 AM - edited 05-07-2019 11:53 AM
There should be a small pin-hole on the back of your laptop. Press it in for 10 seconds while the laptop is turned off. I've been having issues with HDMI output (or any dual monitor configuration) not working. I did this reset thing to fix it, and noticed it also seemed to fix my display brightness issue as well.
Doesn't last forever though. I've already had to do this twice.
05-22-2019 04:07 AM
I think I found the solution. Please ensure the laptop is on battery power. Go to the "intel graphics control panel" and into "energy settings". Disable the "energy saving settings for monitor" and apply. I haven't tested this thouroughly but it seems to do the trick. I don't know for sure how battery life is affected.
It might be possible to enable the energy saving settings but at a lower setting. I haven't tested this yet.
06-24-2019 11:18 PM
Same issue happening for me. Just to clarify, when this happens, after resume from sleep - setting to the maximum in the software doesn't make the screen fully bright. A restart returns it to normal.
I have all current drivers, firmware installed. And there is no 'Dynamic Brightness' option in the Lenovo Vantage App that I have.