Ubuntu doesn't use the second core of my CPU, ubuntu can recognize it but even when the first core is really busy (+90%) the second one keeps in 0,0% of use.
Why is that? This PC came with ubuntu 16.04 and i manually upgraded it to 18.04, maybe i have and old driver?
Edit Summary: 1: i cannot answer that question, anyways it doesn't matters but My CPU is: Intel(R) Celeron(R) CPU N3350 @ 1.10GHz. 2 : microsoft edge, zoom are the principal problems, edge by it self can make the core 1 of the cpu hit 100% percent of use.
stress --cpu 2. I guess your application just does not use multithreading.