After few months of diaspora to Windows land I came back to using Linux. Installed Debian - internet works sketchy. I have low and high ping at the same time (2 packets with 14ms, 1 with ~1000ms). Ok, time to try Ubuntu. 17.10 same bug,.18.04 same story. Turned of power saving, installed wicd. Nothing helped. So now I'm using old android phone as wifi dongle 😂