Ethernet connection is slow to start

endless · 2026-10-20 16:59:51

when my PC boots or wakes up from sleep, it takes like one minute for the ethernet to work, this problem persists even when I boot the windows partition but it takes linux more time over all i tried to search for this problem and i found something of interest in the journal :

 journalctl -b | grep -iE 'enp|eth|carrier|link is'
Oct 20 16:19:03 archlinux kernel: PM: genpd: Disabling unused power domains
Oct 20 16:19:05 Archbox kernel: r8169 0000:22:00.0 eth0: RTL8168h/8111h, (my mac address here), XID 541, IRQ 77
Oct 20 16:19:05 Archbox kernel: r8169 0000:22:00.0 eth0: jumbo features [frames: 9194 bytes, tx checksumming: ko]
Oct 20 16:19:05 Archbox kernel: r8169 0000:22:00.0 enp34s0: renamed from eth0
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.7188] Read config: /etc/NetworkManager/NetworkManager.conf, /usr/lib/NetworkManager/conf.d/20-connectivity.conf, /etc/NetworkManager/conf.d/10-carrier-timeout.conf, /var/lib/NetworkManager/NetworkManager-intern.conf
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8174] manager: (enp34s0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/2)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8179] settings: (enp34s0): created default wired connection 'Wired connection 1'
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8179] device (enp34s0): state change: unmanaged -> unavailable (reason 'managed', managed-type: 'external')
Oct 20 16:19:07 Archbox kernel: r8169 0000:22:00.0 enp34s0: Link is Down
Oct 20 16:19:28 Archbox kernel: r8169 0000:22:00.0 enp34s0: Link is Up - 10Mbps/Full (downshifted) - flow control off
Oct 20 16:19:28 Archbox NetworkManager[755]: <info>  [1792513168.7661] device (enp34s0): carrier: link connected
Oct 20 16:19:28 Archbox NetworkManager[755]: <info>  [1792513168.7663] device (enp34s0): state change: unavailable -> disconnected (reason 'carrier-changed', managed-type: 'full')
Oct 20 16:19:28 Archbox NetworkManager[755]: <info>  [1792513168.7672] device (enp34s0): Activation: starting connection 'Wired connection 1' (UUID here)
Oct 20 16:19:28 Archbox NetworkManager[755]: <info>  [1792513168.7672] device (enp34s0): state change: disconnected -> prepare (reason 'none', managed-type: 'full')
Oct 20 16:19:28 Archbox NetworkManager[755]: <info>  [1792513168.7673] device (enp34s0): state change: prepare -> config (reason 'none', managed-type: 'full')
Oct 20 16:19:28 Archbox NetworkManager[755]: <info>  [1792513168.7677] device (enp34s0): state change: config -> ip-config (reason 'none', managed-type: 'full')
Oct 20 16:19:28 Archbox NetworkManager[755]: <info>  [1792513168.7680] dhcp4 (enp34s0): activation: beginning transaction (timeout in 45 seconds)
Oct 20 16:19:30 Archbox NetworkManager[755]: <info>  [1792513170.4011] dhcp6 (enp34s0): activation: beginning transaction (timeout in 45 seconds)
Oct 20 16:19:30 Archbox NetworkManager[755]: <info>  [1792513170.4182] dhcp6 (enp34s0): state changed new lease
Oct 20 16:19:30 Archbox NetworkManager[755]: <info>  [1792513170.4189] device (enp34s0): state change: ip-config -> ip-check (reason 'none', managed-type: 'full')
Oct 20 16:19:30 Archbox NetworkManager[755]: <info>  [1792513170.4386] device (enp34s0): state change: ip-check -> secondaries (reason 'none', managed-type: 'full')
Oct 20 16:19:30 Archbox NetworkManager[755]: <info>  [1792513170.4387] device (enp34s0): state change: secondaries -> activated (reason 'none', managed-type: 'full')
Oct 20 16:19:30 Archbox NetworkManager[755]: <info>  [1792513170.4391] device (enp34s0): Activation: successful, device activated.
Oct 20 16:19:32 Archbox NetworkManager[755]: <info>  [1792513172.9096] dhcp4 (enp34s0): state changed new lease, address=(local ip address here), acd pending
Oct 20 16:19:33 Archbox NetworkManager[755]: <info>  [1792513173.0553] dhcp4 (enp34s0): state changed new lease, address= (local ip address here)
Oct 20 16:19:33 Archbox NetworkManager[755]: <info>  [1792513173.0566] policy: set 'Wired connection 1' (enp34s0) as default for IPv4 routing and DNS

this problem has got me on my nerves, i would appreciate your help.

cryptearth · 2026-10-20 17:51:21

have you tried another cable?

endless · 2026-10-20 18:22:26

i didn't actually, the router is far from the pc, so i bought a 10 meter cable , I don't have another 10 meter cable so i never tried another one...

seth · 2026-10-20 18:33:34

The grep omits some critical patterns but

Oct 20 16:19:28 Archbox kernel: r8169 0000:22:00.0 enp34s0: Link is Up - 10Mbps/Full (downshifted) - flow control off

the by far most likely cause is the cable.
Don't forget that plugs are part of the cable and sometimes they're loose.

You can post the complete journal so we can actually see what else is happening in the 20s before the downshifted carrier appears but it's (99.5 + ε)% the cable (ε ≈ 0.5%)

endless · 2026-10-20 22:57:20

here 20s before:

Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.7185] NetworkManager (version 1.58.1-2) is starting... (boot:58e13119-8cc6-47e9-b159-d969991cdb63)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.7188] Read config: /etc/NetworkManager/NetworkManager.conf, /usr/lib/NetworkManager/conf.d/20-connectivity.conf, /etc/NetworkManager/conf.d/10-carrier-timeout.conf, /var/lib/NetworkManager/NetworkManager-intern.conf
Oct 20 16:19:06 Archbox systemd-logind[757]: Watching system buttons on /dev/input/event1 (Power Button)
Oct 20 16:19:06 Archbox systemd-logind[757]: Watching system buttons on /dev/input/event0 (Power Button)
Oct 20 16:19:06 Archbox systemd-logind[757]: New seat seat0.
Oct 20 16:19:06 Archbox systemd[1]: Started User Login Management.
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.7281] manager[0x5621b516f130]: monitoring kernel firmware directory '/lib/firmware'.
Oct 20 16:19:06 Archbox systemd[1]: Starting Hostname Service...
Oct 20 16:19:06 Archbox systemd[1]: Started Hostname Service.
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.7750] hostname: hostname: using hostnamed
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.7750] hostname: static hostname changed from (none) to "Archbox"
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.7752] dns-mgr: init: dns=default,systemd-resolved rc-manager=symlink
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.7810] manager[0x5621b516f130]: rfkill: Wi-Fi hardware radio set enabled
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.7810] manager[0x5621b516f130]: rfkill: WWAN hardware radio set enabled
Oct 20 16:19:06 Archbox systemd[1]: Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8072] Loaded device plugin: NMTeamFactory (/usr/lib/NetworkManager/1.58.1-2/libnm-device-plugin-team.so)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8097] Loaded device plugin: NMBluezManager (/usr/lib/NetworkManager/1.58.1-2/libnm-device-plugin-bluetooth.so)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8102] Loaded device plugin: NMOvsFactory (/usr/lib/NetworkManager/1.58.1-2/libnm-device-plugin-ovs.so)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8106] Loaded device plugin: NMAtmManager (/usr/lib/NetworkManager/1.58.1-2/libnm-device-plugin-adsl.so)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8114] Loaded device plugin: NMWifiFactory (/usr/lib/NetworkManager/1.58.1-2/libnm-device-plugin-wifi.so)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8117] Loaded device plugin: NMWwanFactory (/usr/lib/NetworkManager/1.58.1-2/libnm-device-plugin-wwan.so)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8119] manager: rfkill: Wi-Fi enabled by radio killswitch; enabled by state file
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8119] manager: rfkill: WWAN enabled by radio killswitch; enabled by state file
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8119] manager: Networking is enabled by state file
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8121] settings: Loaded settings plugin: keyfile (internal)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8140] dhcp: init: Using DHCP client 'internal'
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8143] manager: (lo): new Loopback device (/org/freedesktop/NetworkManager/Devices/1)
Oct 20 16:19:06 Archbox systemd[1]: Starting Network Manager Script Dispatcher Service...
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8159] device (lo): state change: unmanaged -> unavailable (reason 'connection-assumed', managed-type: 'external')
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8161] device (lo): state change: unavailable -> disconnected (reason 'connection-assumed', managed-type: 'external')
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8168] device (lo): Activation: starting connection 'lo' (6e21a67c-0d32-447a-8c36-c12ff523939c)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8174] manager: (enp34s0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/2)
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8179] settings: (enp34s0): created default wired connection 'Wired connection 1'
Oct 20 16:19:06 Archbox NetworkManager[755]: <info>  [1792513146.8179] device (enp34s0): state change: unmanaged -> unavailable (reason 'managed', managed-type: 'external')

I think i need to buy another cable....

Last edited by endless (2026-10-20 22:57:35)

seth · Yesterday 14:35:21

Not the spot 20s before but the range.

But yes, it's most likely the cable still (though seriously pay attention to the plug fitting - wouldn't be the first time…)

Arch Linux

#1 2026-10-20 16:59:51

Ethernet connection is slow to start

#2 2026-10-20 17:51:21

Re: Ethernet connection is slow to start

#3 2026-10-20 18:22:26

Re: Ethernet connection is slow to start

#4 2026-10-20 18:33:34

Re: Ethernet connection is slow to start

#5 2026-10-20 22:57:20

Re: Ethernet connection is slow to start

#6 Yesterday 14:35:21

Re: Ethernet connection is slow to start

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