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aretheybackfrom711yet

Member

Registered: 2019-07-01

Posts: 14

Ethernet stopped working after reboot.

Hi all

My ethernet was working fine until it suddenly stopped after a reboot.

$dhcpcd@enp2s0.service - dhcpcd on enp2s0
     Loaded: loaded (/usr/lib/systemd/system/dhcpcd@.service; disabled; vendor preset: disabled)
     Active: failed (Result: protocol) since Wed 2020-04-01 19:47:15 CDT; 1min 23s ago
    Process: 1879 ExecStart=/usr/bin/dhcpcd -q -w enp2s0 (code=exited, status=0/SUCCESS)

Apr 01 19:47:15 waffles systemd[1]: Starting dhcpcd on enp2s0...
Apr 01 19:47:15 waffles dhcpcd[1879]: sending commands to master dhcpcd process
Apr 01 19:47:15 waffles systemd[1]: dhcpcd@enp2s0.service: Can't open PID file /run/dhcpcd-enp2s0.pid (yet?) after start: Operation not permitted
Apr 01 19:47:15 waffles systemd[1]: dhcpcd@enp2s0.service: Failed with result 'protocol'.
Apr 01 19:47:15 waffles systemd[1]: Failed to start dhcpcd on enp2s0.

Last edited by aretheybackfrom711yet (2020-04-02 17:01:11)

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seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 77,890

Re: Ethernet stopped working after reboot.

Please post a complete system journal and the output of "ip a"

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aretheybackfrom711yet

Member

Registered: 2019-07-01

Posts: 14

Re: Ethernet stopped working after reboot.

Please post a complete system journal and the output of "ip a"

Thanks for the response. It kinda just started working again after a few reboots.

Last edited by aretheybackfrom711yet (2020-04-02 17:01:41)

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Thinkpad E485 | Ryzen 5 2500U + Vega 8
wayland | sway | waybar

aretheybackfrom711yet

Member

Registered: 2019-07-01

Posts: 14

Re: Ethernet stopped working after reboot.

Please post a complete system journal and the output of "ip a"

ip a: https://termbin.com/s7bo

journalctl -xe : https://termbin.com/225f

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Thinkpad E485 | Ryzen 5 2500U + Vega 8
wayland | sway | waybar

loqs

Member

Registered: 2014-03-06

Posts: 19,082

Re: Ethernet stopped working after reboot.

Please do use the -x option posting https://lists.freedesktop.org/archives/ … 13029.html
The complete journal for the previous boot would be the output from

journalctl -b -1

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 77,890

Re: Ethernet stopped working after reboot.

By "ethernet" you mean the RJ45-wired one, enp2s0 ?

Because

2: enp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
…
3: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
…
    inet 192.168.0.113/24 brd 192.168.0.255 scope global dynamic noprefixroute wlp4s0

you've no carrier (cable…) and switched over to the wifi connection (which at this point works)

If the problem is that the wired connection randomly fails, check the cable. The NIC could have some broken powersaving (do you have a parallel windows installation?) but in 98.76% of all cases (number totally not made up) it's a broken cable or loose plugs.

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