Ubuntu 20.04 Network issues

networking network-manager dhcp

12,344

I had to follow the steps given in this answer

Basically run these two commands

sudo touch /etc/NetworkManager/conf.d/10-globally-managed-devices.conf
sudo systemctl restart NetworkManager

12,344

Author by

Mat.C

Updated on September 18, 2022

Comments

Mat.C over 1 year
OS: Ubuntu 20.04

Each time that I start the pc and log into my account the ethernet Connection doesn't work and the ethernet icon does not appear in the top-bar.

cat /etc/netplan/*.yaml output:
```
# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager
```
if I run sudo lshw -C network i get the following output
```
  *-network DISABLED        
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: enp3s0
       version: 0c
       serial: e0:3f:49:46:0b:53
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical
       configuration: broadcast=yes driver=r8169 latency=0 link=no multicast=yes
       resources: irq:18 ioport:d000(size=256) memory:f7100000-f7100fff memory:f2100000-f2103fff
```
I saw that i had to put it's logical name inside the /etc/network/interfaces
```
auto enp3s0
iface enp3s0 inet dhcp
```
toggle the managed field inside /etc/NetworkManager/NetworkManager.conf
```
[ifupdown]
managed=true
```
and reboot.

I did so but didn't work. The only way that is currenty working is to run sudo dhclient but i have to run it at each reboot. What can i try for a perma solution?
- Pilot6 almost 4 years
  
  The internet icon doesn't appear because you've changed /etc/network/interfaces.
- Mat.C almost 4 years
  
  It wasn't appearing also before changing it, it was an empty file
- Pilot6 almost 4 years
  
  It shouldn't be an empty file either.
- trond hansen almost 4 years
  
  if you click on the ethernet conection and go to settings for wired connection is there a tab that say connect automatic is this on or off.
- Mat.C almost 4 years
  
  I have nothing about ethernet connection in the settings, only wifi
- Boris Hamanov almost 4 years
  
  Is this a desktop or server installation? Edit your question and show me sudo lshw -C network. Start comments to me with @heynnema or I'll miss them.
- Boris Hamanov almost 4 years
  
  Show me sudo lshw -C network and cat /etc/netplan/*.yaml.
- Mat.C almost 4 years
  
  @heynnema i edited the question with your rqeusts
- Boris Hamanov almost 4 years
  
  I've put together an answer that requests a couple of edits, and points out a possible cable problem. Please review and report back.
- Boris Hamanov almost 4 years
  
  Status please...
- Boris Hamanov almost 4 years
  
  Status please...