Arch Linux

andytl755

Member

Registered: 2026-03-11

Posts: 1

Ethernet keeps randomly dropping out and returning

Ethernet keeps randomly dropping out and returning after approximately 30 seconds.

I am new to Arch Linux and I’m having difficulty troubleshooting this. I’m not sure what else to post except the following log:

$ journalctl -f 
Mar 11 19:21:10 blackcat systemd-resolved[379]: Switching to fallback DNS server 1.1.1.1#cloudflare-dns.com. 
Mar 11 19:21:12 blackcat rtkit-daemon[707]: Supervising 8 threads of 5 processes of 1 users. 
Mar 11 19:21:12 blackcat rtkit-daemon[707]: Supervising 8 threads of 5 processes of 1 users. 
Mar 11 19:21:13 blackcat systemd-networkd[394]: eno1: Gained carrier 
Mar 11 19:21:13 blackcat kernel: e1000e 0000:00:1f.6 eno1: NIC Link is Up 1000 Mbps Full Duplex, Flow Control:
None 
Mar 11 19:21:13 blackcat systemd-networkd[394]: eno1: DHCPv4 address 192.168.1.205/24, gateway 192.168.1.254 a
cquired from 192.168.1.254 
Mar 11 19:21:15 blackcat systemd[630]: Started Konsole - Terminal. 
Mar 11 19:21:15 blackcat konsole[29733]: QLayout: Cannot add a null widget to QHBoxLayout/ 
Mar 11 19:21:15 blackcat systemd[630]: Started app-org.kde.konsole-29733.scope. 
Mar 11 19:21:44 blackcat systemd[1]: systemd-hostnamed.service: Deactivated successfully. 
Mar 11 19:22:10 blackcat rtkit-daemon[707]: Supervising 8 threads of 5 processes of 1 users. 
Mar 11 19:22:10 blackcat rtkit-daemon[707]: Supervising 8 threads of 5 processes of 1 users. 
Mar 11 19:22:11 blackcat kernel: e1000e 0000:00:1f.6 eno1: NIC Link is Down 
Mar 11 19:22:11 blackcat systemd-networkd[394]: eno1: Lost carrier 
Mar 11 19:22:11 blackcat systemd-networkd[394]: eno1: DHCP lease lost 
Mar 11 19:22:11 blackcat systemd-networkd[394]: eno1: DHCPv6 lease lost 
Mar 11 19:22:11 blackcat systemd[1]: Starting Hostname Service... 
Mar 11 19:22:11 blackcat systemd[1]: Started Hostname Service. 
Mar 11 19:22:11 blackcat systemd-hostnamed[29824]: Hostname set to <blackcat> (static) 
Mar 11 19:22:14 blackcat systemd-resolved[379]: Switching to fallback DNS server 1.1.1.1#cloudflare-dns.com. 
Mar 11 19:22:14 blackcat kernel: e1000e 0000:00:1f.6 eno1: NIC Link is Up 1000 Mbps Full Duplex, Flow Control:
None 
Mar 11 19:22:14 blackcat systemd-networkd[394]: eno1: Gained carrier 
Mar 11 19:22:15 blackcat rtkit-daemon[707]: Supervising 8 threads of 5 processes of 1 users. 
Mar 11 19:22:15 blackcat rtkit-daemon[707]: Supervising 8 threads of 5 processes of 1 users. 
Mar 11 19:22:19 blackcat systemd-networkd[394]: eno1: DHCPv4 address 192.168.1.205/24, gateway 192.168.1.254 a
cquired from 192.168.1.254 
^C 
$

I have tried searching Google and I know that the purpose of Arch Linux is to troubleshoot yourself, but I’ve been struggling and trying to manage with it for a few months now and I’m still none the wiser. Please help?

mithrial

Member

Registered: 2017-03-05

Posts: 146

Re: Ethernet keeps randomly dropping out and returning

e1000e looks like a really bad interface. You could search the wiki or this forum for additional advice for this device.

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 74,269

Re: Ethernet keeps randomly dropping out and returning

Mar 11 19:21:13 blackcat systemd-networkd[394]: eno1: Gained carrier 
Mar 11 19:22:11 blackcat systemd-networkd[394]: eno1: Lost carrier 
Mar 11 19:22:14 blackcat systemd-networkd[394]: eno1: Gained carrier 

From what can be said from the provided segment the carrier flickers ie. if it's not the cable (broken or loose) it might be some power saving issue, aspm or e1000e has a SmartPowerDownEnable parameter.
Does it remain stable if you keep "ping 8.8.8.8" running?

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