Hi,
I am new to nixos, I just started using it with a fresh install (nixos 20.03) on my new computer (a thinkpad t15p gen 1) and it’s a lot of fun.
However I’m having an unusual problem : my wifi connection works great but I can’t use my RJ45 port.
It seems that my system can’t recognize the ethernet interface. This is the output of ifconfig:
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp0s20f3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.14 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 2a01:cb08:9072:a00:6c22:1182:8fca:1202 prefixlen 64 scopeid 0x0<global>
inet6 2a01:cb08:9072:a00:367d:f6ff:fedc:588e prefixlen 64 scopeid 0x0<global>
inet6 fe80::367d:f6ff:fedc:588e prefixlen 64 scopeid 0x20<link>
inet6 fe80::6733:d2ab:fd04:f151 prefixlen 64 scopeid 0x20<link>
inet6 2a01:cb08:9072:a00:2d11:dd2d:bce0:1529 prefixlen 64 scopeid 0x0<global>
inet6 2a01:cb08:9072:a00:b90e:add4:91f9:19b9 prefixlen 64 scopeid 0x0<global>
ether 34:7d:f6:dc:58:8e txqueuelen 1000 (Ethernet)
RX packets 48737 bytes 41945434 (40.0 MiB)
RX errors 0 dropped 141 overruns 0 frame 0
TX packets 23269 bytes 3722515 (3.5 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
and this is the output of lshw -class network:
*-network:0
description: Wireless interface
physical id: 14.3
bus info: pci@0000:00:14.3
logical name: wlp0s20f3
version: 00
serial: 34:7d:f6:dc:58:8e
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.4.54 firmware=50.3e391d3e.0 ip=192.168.1.14 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: iomemory:600-5ff irq:16 memory:604111c000-604111ffff
*-network:1 UNCLAIMED
physical id: 1f.6
bus info: pci@0000:00:1f.6
version: 00
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: latency=0
resources: memory:98500000-9851ffff
I am really not a “technical” person so I am not able to get a lot of informations from those. However I noticed that the “interface 0”, while being described as a “Wireless interface” also has “ethernet” listed in its capabilities. Maybe the problem is that the driver can’t separate the two ?
From this list of specification: https://psref.lenovo.com/Product/ThinkPad/ThinkPad_T15p_Gen_1
I get that my “ethernet card” is an “Intel Ethernet Connection I219-LM”.
I found this topic about someone having what appears to be the same issue with this card:
Intel Ethernet I219-LM Driver in Ubuntu 16.04 - Ask Ubuntu
The fix was to install the driver “e1000e”. I tried to install what I found corresponding to this in nixpkgs: linuxPackages_4_9.e1000e but it did nothing.
Does anyone have an idea about the source of this problem ?
BTW: I’m using network manager and here is my hardware-configuration.nix:
# Do not modify this file! It was generated by ‘nixos-generate-config’
# and may be overwritten by future invocations. Please make changes
# to /etc/nixos/configuration.nix instead.
{ config, lib, pkgs, ... }:
{
imports =
[ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
];
boot.initrd.availableKernelModules = [ "xhci_pci" "nvme" "usb_storage" "sd_mod" "sdhci_pci" ];
boot.initrd.kernelModules = [ ];
boot.kernelModules = [ "kvm-intel" ];
boot.extraModulePackages = [ ];
fileSystems."/" =
{ device = "/dev/disk/by-uuid/42f3c6f7-66ee-425b-934b-ee1f58e2e415";
fsType = "ext4";
};
fileSystems."/boot" =
{ device = "/dev/disk/by-uuid/52C1-1B05";
fsType = "vfat";
};
fileSystems."/home" =
{ device = "/dev/disk/by-uuid/419e7a0e-ff8c-44ca-935f-e4aa4fbb3761";
fsType = "ext4";
};
swapDevices =
[ { device = "/dev/disk/by-uuid/5360010a-b9a3-41fb-b23c-d0748fd9306d"; }
];
nix.maxJobs = lib.mkDefault 8;
powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
}