Since some weeks (I didn't use the video playback on this machine for quite a while), I experience lagging/stuttering while playing videos, regardless if it is in a browser or in Ubuntu videos, only in VLC is the result more or less satisfying...
The problem is that the video (not the audio) pauses at a completely random point, sometimes for a fraction of a second, sometimes for a whole second or even more. The problem happened at some point while was using Ubuntu 16.04, I hoped an upgrade to 18.04 may bring it back to normal, well.. It didn't.
I have a intel i5-6200U cpu with HD Graphics 520 and 8G RAM installed. Problem happens while using the laptop screen.
Wen i run intel_gpu_top the highest usage never exceeds 25%.
I have reinstalled xserver-xorg-video-intel & xserver-xorg-core and libgl1-mesa-glx & libgl1-mesa-dri as well as ubuntu-restricted-extras.
Do you have any idea where this new feature could have emerged from?