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Ethernet device not being picked up by NetworkManager

pl flag

I am using ubuntu 20.04 Desktop on one of my machines for the past ~6 months, this morning my internet connection stopped functioning. I have not been able to fix it yet. When running on a live CD on the same machine I have an internet connection with no issues.

running nmcli dev results in only the loopback device, but lspci can find the card

$ lspci | grep Ethernet
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)

The above is a wired interface which works fine on the LiveCD.

My NetworkManager.conf is identical to that on the LiveCD (which works) as is every other file I can see in /etc/network /etc/NetworkManager and /etc/netplan. I also tried rolling back /lib/firmware after noticing a line in journalctl about that directory updating before it broke, but to no avail.

Does anyone know what more I can do from here? I'd like to avoid going through a reinstall if possible. I feel this may have been caused by an automatic update, but I don't have any hard evidence towards that.

nobody avatar
gh flag
can you boot an older Kernel?
mangohost

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