Hi, recently I’ve installed Xubuntu 18.04 on my laptop. After that I noticed it’s slow and started wondering what is reason for that. It turned out that ubuntu is using only one thread. More precisly, when browsing internet three theards are used in ~5% and one is under full load. On idle it’s like one thread 35% and three threads 2%.
I tried installing different kernels and found out that on 4.4.139 laptop works smooth and processor usage is fine. Unfortunately, after few reboots I got these errors https://ibb.co/m2Vy7T and xfce didn’t start, I could only log in on black screen. Can anyone help me? Thanks in advance.