Just wanted to say that I have the same issue with the Huawei MediaPad M2 10.0.
EMUI 3.1.
So freaking annoying.
EDIT: Ok, I fixed the issue by going into Settings > Power Saving > and chose "Normal" instead of "Smart". Now when I switch between Apps the screen doesn't dim anymore.
I am intending to purchase the Mate 10, however it too has that dimming issue. Damir Franc created a video review entitled
Huawei Mate 10 Ultimate | in-depth Review & Mate 10 Pro comparison. In his review Damir describes and illustrates the dimming issue.
Blinkydude, after reading what you wrote my hopes were raised. I downloaded both the
Huawei Mate 10 User Guide and the
Huawei Mate 10 Pro User Guide in an attempt to locate what you wrote. Unfortunately there is no mention of what you wrote within those guides. I copied and pasted the below information, it appears in identical form in both Guides.
Their only reference to "Power Saving" is in the section referring to battery power consumption.
Also, the only reference to a "Smart" setting refers to the screen's resolution but not to brightness.
Optimize Power Consumption
Running out of battery at an inopportune time can cause many inconveniences. Power saving features can help to prolong the battery life of your Phone, allowing you to play games or enjoy other features for longer.
Open Phone Manager and touch remaining to perform the following:
View power consumption details: Touch
Battery usage to view power consumption details.
In the Battery usage details section, the blue marks beneath Charging indicate the times when your device was charging. Gaps between the marks indicate times when your device was not charging. This feature does not consume power. Touch Battery usage to view which apps and hardware are
consuming the most power.
Comprehensive power consumption check and optimization: Touch
Battery usage to check for power consumption problems and automatically optimize performance.
Enable Power saving mode or Ultra power saving mode: Enable
Power saving mode or
Ultra power saving mode. Choose the appropriate power saving mode based on your Phone's battery level to extend battery life.
Adjust screen resolution to save power: Enable
Screen resolution and select
Smart resolution. Your device will automatically lower the screen resolution to save power. You can also manually set the screen resolution to save power when high resolution is unnecessary.
Display remaining battery percentage in status bar: Enable Battery percentage to display the remaining battery percentage in the status bar.
Manage app launches to save power: Touch
Dropzone to automatically or manually manage app auto-launch, secondary launch, and background activity. The system will automatically manage power usage to save power."
Unfortunately, it appears from their User Guides that the Mate 10 and Mate 10 Pro does not have the option you described
