I received the laptop last week, and finally got around installing Ubuntu 20.10.
The first thing I noticed after the installation was the stuttering of the system/trackpad. It didn’t really feel like the problem was the trackpad though, because the performance monitor would freeze as well.
I then left he machine be for a couple of days, and started using it again today. I set it up so that I could work on it, and I used it for the whole afternoon,without any issue. It was so smooth that to be honest I even forgot about the stuttering altogether.
I was working with an external monitor connected via USB-C (HDMI on the other side, though, so no USB-C-to-USB-C connection) and and a USB-A hub for mouse and keyboard.
Here is where the fun starts: my battery reached 10%, so I disconnected the external monitor and plugged in the charger. Lo and behold, the stuttering is back. And it is clearly not the trackpad, as he interface freezes when using my external mouse.
I tried some combinations:
- No charge, and no external screen > It still stutters, but possibly less than before
- No charge, and back with the external monitor > It appears to be as smooth as it was the whole afternoon
Conclusion: the machine works better if I am not charging and/or if I am using the external monitor.
I have now just changed the psr setting in grub (by the way, I am not sure what
psr stands for, but I assume it has to do with power management). I will reboot, and keep testing tomorrow. I thought I would write this down before I forget or get too lazy (very likely if the grub change fixes the issue )