Helios 300 activates disabled adaptive brightness (Intel's DPST) when unplugging the power cord

neuralbot

In the Intel Graphics panel, in the Power section there's an option called "Display Power Saving Technology" which, when enabled, dims the display based on what's on the screen. Ironically, it actually dims it when the screen is darker, but makes it brighter when you open a white window... to make it even brighter. I disabled this setting and so far so good.

The problem is that when I plug the laptop to a power source and then unplug it. Once it's unplugged, the screen starts to dim itself as if this option was enabled. What's even weirder is that in the Intel control panel DPST is still set as "disabled". If I set it to "enabled", save changes, then back to "disable" and save changes again, the issue stops so somehow the switch from power adapter to battery reenables DPST without changing the actual settings.

Does anyone have an idea what else I could try or if it's really Acer's fault or maybe indeed it's a problem with Intel's graphic panel/driver? I updated the drivers of course so I'm using the latest version of Intel UHD Graphics 630 (25.20.100.6617).

neuralbot

Please help