Arch Linux

dbacc

Member

Registered: 2014-09-25

Posts: 120

[Solved] Ethernet adapter not working: No Carrier

Hi,

when I attach my notebook (Lenovo T14 AMD) with my router I don't get a carrier signal. The LED on the router side flashes green permanently, while on the notebook end there are no lights.

Am I missing some additional kernel module or some parameters or what is going on here?

networkctl list
IDX LINK     TYPE     OPERATIONAL SETUP      
  1 lo       loopback carrier     unmanaged
  2 enp2s0f0 ether    no-carrier  configuring
  3 enp5s0   ether    no-carrier  configuring
  5 wlan0    wlan     routable    configured 

lspci | grep Ethernet
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0e)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)

Last edited by dbacc (2021-08-16 20:20:33)

Slithery

Administrator

From: Norfolk, UK

Registered: 2013-12-01

Posts: 5,776

Re: [Solved] Ethernet adapter not working: No Carrier

Have you tried a different cable?

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No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

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dbacc

Member

Registered: 2014-09-25

Posts: 120

Re: [Solved] Ethernet adapter not working: No Carrier

Yes, I did. Still the same situation.

dbacc

Member

Registered: 2014-09-25

Posts: 120

Re: [Solved] Ethernet adapter not working: No Carrier

Okay, it does indeed work, _if_ the cable is connected pre boot. When I disconnect it and reconnect it, the connection is not reestablished and is marked as NO CARRIER.

[    2.264423] r8169 0000:02:00.0 enp2s0f0: renamed from eth0
[    2.281972] r8169 0000:05:00.0 enp5s0: renamed from eth1
[    2.473853] r8169 0000:02:00.0 enp2s0f0: Link is Down
[    2.717338] r8169 0000:05:00.0 enp5s0: Link is Down
[    5.640478] IPv6: ADDRCONF(NETDEV_CHANGE): enp5s0: link becomes ready
[    5.640739] r8169 0000:05:00.0 enp5s0: Link is Up - 1Gbps/Full - flow control rx/tx
[  212.782189] r8169 0000:05:00.0 enp5s0: Link is Down

The Link is Down and never comes up again

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,982

Re: [Solved] Ethernet adapter not working: No Carrier

https://archlinux.org/packages/community/x86_64/r8168/ ?

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dbacc

Member

Registered: 2014-09-25

Posts: 120

Re: [Solved] Ethernet adapter not working: No Carrier

Indeed, this packaged helped resolving the issue.