Why does the Samsung 535u3c-a02uk performance drop when connected to the mains?

Question

Electronics

There is a Samsung 535u3c-a02uk laptop with A6-4455 APU, it comes with Windows 8. The latest drivers from Samsung and all Windows updates are installed.
Maybe someone has encountered such a problem or can guess its cause:
- in the power management settings, everything is set to high performance when working from the network
- when running on battery, when playing videos on Youtube, for example, the Chrome process uses ~ 20% of the CPU ( this is a built-in Flash)
- when running from the network, Chrome's CPU usage rises to 50%, i.e. the whole processor core is being devoured Is there an
error in the management of graphic acceleration?
UPD:

I installed AMD System Monitor, noticed that when the adapter is connected, the load distribution (the uppermost graph) moves completely towards the CPU, while from the battery, when watching a video, the load on the GPU core is somewhere around 40%
I think it's possible that the problem is a malfunction of the adapter ? For example, there is not enough voltage for charging and for powering the APU, while powering only from the battery is more stable?

Answer 1

I've been struggling with this bug for three days now. Bios updated to the latest. It manifests itself stably in both archlinux and seven. Moreover, if the video is hardware-accelerated on the seven and the battery is not all good, then in Linux the picture is noticeably simply radical. Coolers also start to buzz when you insert the power plug. I met quite a lot of the same messages on bourgeois boards.
Is it really a hard bug and can't be treated with software?
Did a battery calibration, and reset the battery.

Answer 2

Try not chrome, I have a laptop on A8, I noticed similar glitches, there are no problems on firefox and opera.

Answer 3

Set the performance settings when running on battery to the maximum, disable the fast stop of the HDD and more. Compare CPU usage when running on mains and battery. Should be about the same.

Answer 4

On the Internet, I found a recipe to turn off PowerPlay, on ixbt a person with the same symptoms helped. Therefore, a new problem, how to disable it?) There is no checkmark in the Vision engine control center