I am experiencing a very similar issue to the following:
No Internet even though Wifi or Ethernet is connected, Ubuntu 22.04
The setup is a "Dell T5810 Precision Tower Desktop - (Black) (Intel Xeon E5-1650V4 3.60 GHz, 16 GB RAM, 512 GB SSD, NVIDIA Quadro M2000 Graphics, Windows 10 Pro)".
I added a new partition for Dual Boot and installed the Desktop Version of Ubuntu 22.04.
After first installation, under Network Settings - the Wired Connection always shows "Connecting" and never connected. I switched back to Windows and there is no issue with the internet connection. Therefore this is not a hardware issue.
Switching back to Ubuntu:
I reinstalled using the same PC Name as the Windows installation.
Auto DCHP always shows Connecting status.
I changed the DCHP to manual and used the same address as the Windows uses.
The status shows Connected with Manual DCHP - but doesn't connect to the internet.
If I disconnect the cable from the Router - Ubuntu tells me the cable has been disconnected.
The Wifi router never shows the server connected when running Ubuntu.
I also tried manual DNS - but given the fact the router doesn't detect the Ubuntu connection as having connected I'm not surprised this didn't work.
I've tried:
sudo rm -f /etc/resolv.conf
sudo ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf
No luck.
The results from:
sudo lshw -class network
*-network
description: Ethernet interface
product: Ethernet Connection I217-LM
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: enp0s25
version: 05
serial: 64:00:XX:XX:bf:a8 <-- Obscured
size: 1Gbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.19.0-32-generic duplex=full firmware=0.13-4 ip=192.168.1.101 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:35 memory:f7200000-f721ffff memory:f7239000-f7239fff ioport:f020(size=32)
ping -c3 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 192.168.1.101 icmp_seq=1 Destination Host Unreachable
From 192.168.1.101 icmp_seq=2 Destination Host Unreachable
From 192.168.1.101 icmp_seq=3 Destination Host Unreachable
--- 8.8.8.8 ping statistics ---
3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2051ms
pipe 3
ping -c3 www.ubuntu.com
ping: www.ubuntu.com: Temporary failure in name resolution
ls -al /etc/resolv.conf
lrwxrwxrwx 1 root root 32 Mar 28 08:55 /etc/resolv.conf -> /run/systemd/resolve/resolv.conf
lspci -vvnn | grep -A 9 Network
Blank
"Kernel driver in use:"
"Kernel modules:"
sudo dmesg | grep -e e100 -e enp0s25
[ 0.967585] e1000e: Intel(R) PRO/1000 Network Driver
[ 0.967586] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 0.968063] e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[ 1.047973] e1000e 0000:00:19.0 0000:00:19.0 (uninitialized): registered PHC clock
[ 1.120441] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) 64:00:XX:XX:bf:a8 <- Obscured
[ 1.120448] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
[ 1.120488] e1000e 0000:00:19.0 eth0: MAC: 11, PHY: 12, PBA No: FFFFFF-0FF
[ 1.340578] e1000e 0000:00:19.0 enp0s25: renamed from eth0
[ 7.435253] e1000e 0000:00:19.0 enp0s25: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[ 7.435306] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link becomes ready
I ordered a USB to Ethernet adaptor and this works. Does anyone has any suggestions on how to fix the issue with the PCI installed Ethernet adapter?
