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Error log:

This is the error log

I have a dual boot desktop system Window and Ubuntu 20.04. I deleted Ubuntu 18.04 which was working fine and installed (not upgraded) to Ubuntu 20.04. Everything was fine, but later I got several problems. I lose the LAN network connect every night. when I go to the office I close the network connection and start it and it works fine for several hours and something still works for days. In the beginning the network always showed a question mark on it. Now it does not show anything and internet connection drops.

I installed caffeine so that the PC does not go to sleep and I removed the screen server in the power section.

I am not sure if anybody has this problem with Ubuntu 20.04.

I also have a problem with TeamViewer with Ubuntu. Every time I switch off the display I can not longer use TeamViewer.

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  • Look at the logs! sudo journalctl -b 0 -u NetworkManager.
    – waltinator
    Nov 25, 2020 at 1:21
  • @waltinator Hi I got an error '<error> [1606315511.1371] dhcp4 (eno1): error -111 dispatching events'
    – yamifm0f
    Nov 29, 2020 at 16:43

1 Answer 1

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NetworkManager[1108] <error> [1606315511.1371] dhcp4 (eno1): error -111 dispatching events

This seems to be a bug in network manager's dhcp4 client. It has been resolved upstream here.

Make sure your software is up to date, it is likely that this issue would have been integrated into a dot release in the meantime.

If you are up to date and still have the same issue, please log a bug against Ubuntu to ensure the patch gets integrated into 20.04.

This bug report includes the following workaround:

Just add

[main]
dhcp=dhclient

into NM's configuration (/etc/NetworkManager/conf.d/use-dhclient.conf for example), and then restart NetworkManager.service.

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