I just updated my T450s to Ubuntu 18.04 LTS and since then the connection request time is just horrible. If I make any connection to the internet, be it curl, ping or a normal website call it takes 3-5 seconds before anything happens. Only then the actuall connection is being established.

What I tried so far:

  • It is intependend of medium (WIFI/ Cable)
  • It is not the DNS as a ping to e.g. still takes time before it starts after pressing enter
  • It is not the internet connection itself as I can download and upload with full speed and its the same issue on LAN
  • It is not a networek isuue as my dekstop computer and phone do not have this issue
  • It is not a hardware issue with the laptop as the problem does not persist with a live booted Ubuntu 18.04.

I'm pretty clueless as to what the issue is and even more so how to debug it properly. I ran strace with the ' -T ' for ping and could identify some calls that are repeatedly taking ~ one second. But I don't know enough about the internals of linux to understand that. I can post said output if neccessary.

Thanks for any help in advance

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