System slow even after a restart, but not after a shutdown/power on

[Arrababiski]

May be helpful if you run this command after a restart, to let us know which service is causing the slowness:

systemd-analyze blame

It’s also a good idea provide your system information:

[HowTo] Find system information

Difficulty: ★☆☆☆☆ Rather than providing the commercial reference of a computer or piece of hardware, it is usually better to directly ask the system to describe itself. On top of saving time to everyone, this also often provides more details, including something specific to the running system. Below is a (not exhaustive) list of commands for retrieving system information. If you don’t know how to use those commands, or how to provide them to support, see: [HowTo] Use the terminal / TTY …