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I gathered a desktop. And I installed ubuntu 20.04. I opened it and everything was okay. Then i installed nvidia-driver 440, then reboot. When i opened the computer, My lan connection is not working. My motherboard: Asus rog strix z490-a gaming

I guess, it may be about motherboard driver. Has anyone idea?

sudo lshw -C network   *-network                 
       description: Ethernet interface
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:05:00.0
       logical name: enp5s0
       version: 01
       serial: d4:5d:64:b3:d5:40
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=igc driverversion=0.0.1-k latency=0 link=no multicast=yes port=twisted pair
       resources: irq:16 memory:81100000-811fffff memory:81200000-81203fff
MesTor
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2 Answers2

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I would give the Pop!_OS kernel a try for the Intel I225-V Ethernet Controller. I have the same NIC on the Asus ROG-STRIX-B550-I. I was running the 5.4.0-42-generic kernel under Ubuntu, and the NIC would not come up. On 5.4.0-7634-generic distributed by Pop, the NIC works. It looks like Pop is using a more up to date branch of the igc driver for kernel 5.4. However, I have noticed that the igc driver still has bugs in kernel 5.4. For instance, the /proc/net/dev stats are blank and do not update under the igc driver for the NIC.

Add the Pop repository:

sudo add-apt-repository ppa:system76/pop

Do an apt update, and apt should recommend to upgrade the kernel to the Pop version.

As an aside, I actually switched kernels by accident when I added the Pop ppa to get their icons under Xubuntu.

I did try compiling the latest source for the igc driver in the 5.8 kernel. And it is a no go for 5.4. It looks like the 5.8 kernel adds some power management dependencies that are lacking in 5.4.

Another option is to upgrade the firmware on the NIC. Others have had success doing this. I have not tried this option b/c Asus has not provided any firmware updates for my particular B550 motherboard.

jksinton
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  • I use a Wi-fi adapter. And I don't have a Lan connection. If i connect to LAN, i will try it. Thanks for reply. – MesTor Sep 25 '20 at 11:16
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You could also try the Xanmod kernel. Available at: https://xanmod.org/

The latest stable is the 5.8.x branch (at time of post) Xanmod also have an LTS version (5.4.x) and a (bleeding) edge version.

If you stick with their 'stable' release though it is supported by the xanmod community and widely used.

mykothy
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