While running Ubuntu 22.10, my wired connection sometimes drops for a few seconds, and I need help identifying the source of this issue. I have no issues on Windows 10, that I'm dual booting. I managed to capture that moment using journalctl -f.
lis 13 14:47:30 dalibor-desktop org.mozilla.firefox.desktop[3476]: [2022-11-13T13:47:30Z ERROR mp4parse] Found 2 nul bytes in "\0\0"
lis 13 14:48:42 dalibor-desktop dbus-daemon[1050]: [session uid=1000 pid=1050] Activating service name='org.gnome.DejaDup' requested by ':1.107' (uid=1000 pid=3456 comm="/usr/libexec/deja-dup/deja-dup-monitor" label="unconfined")
lis 13 14:48:42 dalibor-desktop dbus-daemon[1050]: [session uid=1000 pid=1050] Successfully activated service 'org.gnome.DejaDup'
lis 13 14:49:08 dalibor-desktop kernel: r8169 0000:04:00.0 enp4s0: Link is Down
lis 13 14:49:14 dalibor-desktop NetworkManager[764]: <info> [1668347354.8045] device (enp4s0): state change: activated -> unavailable (reason 'carrier-changed', sys-iface-state: 'managed')
lis 13 14:49:14 dalibor-desktop NetworkManager[764]: <info> [1668347354.8324] dhcp4 (enp4s0): canceled DHCP transaction
lis 13 14:49:14 dalibor-desktop NetworkManager[764]: <info> [1668347354.8324] dhcp4 (enp4s0): activation: beginning transaction (timeout in 45 seconds)
lis 13 14:49:14 dalibor-desktop NetworkManager[764]: <info> [1668347354.8324] dhcp4 (enp4s0): state changed no lease
lis 13 14:49:14 dalibor-desktop NetworkManager[764]: <info> [1668347354.8326] dhcp6 (enp4s0): canceled DHCP transaction
lis 13 14:49:14 dalibor-desktop NetworkManager[764]: <info> [1668347354.8326] dhcp6 (enp4s0): activation: beginning transaction (timeout in 45 seconds)
lis 13 14:49:14 dalibor-desktop NetworkManager[764]: <info> [1668347354.8326] dhcp6 (enp4s0): state changed no lease
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Withdrawing address record for 10.0.1.19 on enp4s0.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Leaving mDNS multicast group on interface enp4s0.IPv4 with address 10.0.1.19.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Interface enp4s0.IPv4 no longer relevant for mDNS.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Withdrawing address record for 2a00:1028:8d19:f44a:a45f:6900:c16a:e603 on enp4s0.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Withdrawing address record for 2a00:1028:8d19:f44a:e892:88c3:9773:d1bd on enp4s0.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Leaving mDNS multicast group on interface enp4s0.IPv6 with address 2a00:1028:8d19:f44a:e892:88c3:9773:d1bd.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Joining mDNS multicast group on interface enp4s0.IPv6 with address fe80::403d:2d26:b518:ff3b.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Registering new address record for fe80::403d:2d26:b518:ff3b on enp4s0.*.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Withdrawing address record for fe80::403d:2d26:b518:ff3b on enp4s0.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Leaving mDNS multicast group on interface enp4s0.IPv6 with address fe80::403d:2d26:b518:ff3b.
lis 13 14:49:14 dalibor-desktop avahi-daemon[692]: Interface enp4s0.IPv6 no longer relevant for mDNS.
lis 13 14:49:14 dalibor-desktop systemd-resolved[665]: enp4s0: Bus client reset search domain list.
lis 13 14:49:14 dalibor-desktop systemd-resolved[665]: enp4s0: Bus client set default route setting: no
lis 13 14:49:14 dalibor-desktop systemd-resolved[665]: enp4s0: Bus client reset DNS server list.
lis 13 14:49:14 dalibor-desktop NetworkManager[764]: <info> [1668347354.9249] manager: NetworkManager state is now DISCONNECTED
lis 13 14:49:14 dalibor-desktop dbus-daemon[696]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.14' (uid=0 pid=764 comm="/usr/sbin/NetworkManager --no-daemon" label="unconfined")
lis 13 14:49:14 dalibor-desktop systemd[1]: Starting Network Manager Script Dispatcher Service...
lis 13 14:49:14 dalibor-desktop dbus-daemon[696]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
lis 13 14:49:14 dalibor-desktop systemd[1]: Started Network Manager Script Dispatcher Service.
lis 13 14:49:24 dalibor-desktop NetworkManager[764]: <info> [1668347364.4946] device (enp4s0): carrier: link connected
lis 13 14:49:24 dalibor-desktop NetworkManager[764]: <info> [1668347364.4948] device (enp4s0): state change: unavailable -> disconnected (reason 'carrier-changed', sys-iface-state: 'managed')
lis 13 14:49:24 dalibor-desktop NetworkManager[764]: <info> [1668347364.4957] policy: auto-activating connection 'Wired connection 1' (830e75e1-7515-3440-9e7c-8347206f808a)
lis 13 14:49:24 dalibor-desktop NetworkManager[764]: <info> [1668347364.4961] device (enp4s0): Activation: starting connection 'Wired connection 1' (830e75e1-7515-3440-9e7c-8347206f808a)
lis 13 14:49:24 dalibor-desktop NetworkManager[764]: <info> [1668347364.4962] device (enp4s0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
lis 13 14:49:24 dalibor-desktop kernel: Generic FE-GE Realtek PHY r8169-0-400:00: Downshift occurred from negotiated speed 1Gbps to actual speed 100Mbps, check cabling!
lis 13 14:49:24 dalibor-desktop kernel: r8169 0000:04:00.0 enp4s0: Link is Up - 100Mbps/Full (downshifted) - flow control off
lis 13 14:49:24 dalibor-desktop NetworkManager[764]: <info> [1668347364.4965] manager: NetworkManager state is now CONNECTING
lis 13 14:49:24 dalibor-desktop NetworkManager[764]: <info> [1668347364.4966] device (enp4s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
lis 13 14:49:24 dalibor-desktop NetworkManager[764]: <info> [1668347364.4969] device (enp4s0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
lis 13 14:49:24 dalibor-desktop NetworkManager[764]: <info> [1668347364.4974] dhcp4 (enp4s0): activation: beginning transaction (timeout in 45 seconds)
lis 13 14:49:24 dalibor-desktop avahi-daemon[692]: Joining mDNS multicast group on interface enp4s0.IPv6 with address fe80::403d:2d26:b518:ff3b.
lis 13 14:49:24 dalibor-desktop avahi-daemon[692]: New relevant interface enp4s0.IPv6 for mDNS.
lis 13 14:49:24 dalibor-desktop avahi-daemon[692]: Registering new address record for fe80::403d:2d26:b518:ff3b on enp4s0.*.
lis 13 14:49:24 dalibor-desktop systemd[1]: NetworkManager-dispatcher.service: Deactivated successfully.
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.2756] dhcp6 (enp4s0): activation: beginning transaction (timeout in 45 seconds)
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.2758] policy: set 'Wired connection 1' (enp4s0) as default for IPv6 routing and DNS
lis 13 14:49:26 dalibor-desktop avahi-daemon[692]: Leaving mDNS multicast group on interface enp4s0.IPv6 with address fe80::403d:2d26:b518:ff3b.
lis 13 14:49:26 dalibor-desktop avahi-daemon[692]: Joining mDNS multicast group on interface enp4s0.IPv6 with address 2a00:1028:8d19:f44a:e892:88c3:9773:d1bd.
lis 13 14:49:26 dalibor-desktop avahi-daemon[692]: Registering new address record for 2a00:1028:8d19:f44a:e892:88c3:9773:d1bd on enp4s0.*.
lis 13 14:49:26 dalibor-desktop avahi-daemon[692]: Withdrawing address record for fe80::403d:2d26:b518:ff3b on enp4s0.
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.2770] dhcp6 (enp4s0): state changed new lease
lis 13 14:49:26 dalibor-desktop dbus-daemon[696]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.14' (uid=0 pid=764 comm="/usr/sbin/NetworkManager --no-daemon" label="unconfined")
lis 13 14:49:26 dalibor-desktop systemd-resolved[665]: enp4s0: Bus client set search domain list to: home
lis 13 14:49:26 dalibor-desktop systemd-resolved[665]: enp4s0: Bus client set default route setting: yes
lis 13 14:49:26 dalibor-desktop systemd-resolved[665]: enp4s0: Bus client set DNS server list to: 2a00:1028:8d19:f44a:828c:97ff:fedf:b40e
lis 13 14:49:26 dalibor-desktop systemd[1]: Starting Network Manager Script Dispatcher Service...
lis 13 14:49:26 dalibor-desktop dbus-daemon[696]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
lis 13 14:49:26 dalibor-desktop systemd[1]: Started Network Manager Script Dispatcher Service.
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.5116] dhcp4 (enp4s0): state changed new lease, address=10.0.1.19
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.5119] policy: set 'Wired connection 1' (enp4s0) as default for IPv4 routing and DNS
lis 13 14:49:26 dalibor-desktop avahi-daemon[692]: Joining mDNS multicast group on interface enp4s0.IPv4 with address 10.0.1.19.
lis 13 14:49:26 dalibor-desktop avahi-daemon[692]: New relevant interface enp4s0.IPv4 for mDNS.
lis 13 14:49:26 dalibor-desktop avahi-daemon[692]: Registering new address record for 10.0.1.19 on enp4s0.IPv4.
lis 13 14:49:26 dalibor-desktop systemd-resolved[665]: enp4s0: Bus client set DNS server list to: 10.0.1.138, 2a00:1028:8d19:f44a:828c:97ff:fedf:b40e
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.5153] device (enp4s0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.5171] device (enp4s0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.5172] device (enp4s0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.5174] manager: NetworkManager state is now CONNECTED_SITE
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.5176] device (enp4s0): Activation: successful, device activated.
lis 13 14:49:26 dalibor-desktop NetworkManager[764]: <info> [1668347366.7830] manager: NetworkManager state is now CONNECTED_GLOBAL
lis 13 14:49:27 dalibor-desktop avahi-daemon[692]: Registering new address record for 2a00:1028:8d19:f44a:158e:9cd0:1f76:43f4 on enp4s0.*.
lis 13 14:49:36 dalibor-desktop systemd[1]: NetworkManager-dispatcher.service: Deactivated successfully.
lis 13 14:49:39 dalibor-desktop systemd[1]: Starting Download data for packages that failed at package install time...
lis 13 14:49:39 dalibor-desktop systemd[1]: update-notifier-download.service: Deactivated successfully.
lis 13 14:49:39 dalibor-desktop systemd[1]: Finished Download data for packages that failed at package install time.
lis 13 14:49:39 dalibor-desktop dbus-daemon[696]: [system] Activating via systemd: service name='org.freedesktop.timedate1' unit='dbus-org.freedesktop.timedate1.service' requested by ':1.20' (uid=0 pid=719 comm="/usr/lib/snapd/snapd" label="unconfined")
lis 13 14:49:39 dalibor-desktop systemd[1]: Starting Time & Date Service...
lis 13 14:49:39 dalibor-desktop dbus-daemon[696]: [system] Successfully activated service 'org.freedesktop.timedate1'
lis 13 14:49:39 dalibor-desktop systemd[1]: Started Time & Date Service.
lis 13 14:49:45 dalibor-desktop dbus-daemon[1050]: [session uid=1000 pid=1050] Activating service name='org.gnome.TextEditor' requested by ':1.46' (uid=1000 pid=1554 comm="/usr/bin/gnome-shell" label="unconfined")
lis 13 14:49:45 dalibor-desktop dbus-daemon[1050]: [session uid=1000 pid=1050] Successfully activated service 'org.gnome.TextEditor'
lis 13 14:49:46 dalibor-desktop gnome-shell[1554]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x2a00005
One particular line reads:
lis 13 14:49:24 dalibor-desktop kernel: Generic FE-GE Realtek PHY r8169-0-400:00: Downshift occurred from negotiated speed 1Gbps to actual speed 100Mbps, check cabling!
The cable I'm using is quite old, but since I'm having no issues on Windows, I'm thinking the issue lies somewhere else.
Please help me identify the issue. I will provide more logs if neccesary.
EDIT: sudo dmesg | grep -e enp -e Network output:
[ 5.754095] r8168 0000:04:00.0 enp4s0: renamed from eth0
[ 8.291679] enp4s0: 0xffffb4c100121000, d8:5e:d3:ad:b0:0e, IRQ 36
[ 22.698420] r8168: enp4s0: link up
[ 22.698490] IPv6: ADDRCONF(NETDEV_CHANGE): enp4s0: link becomes ready
[ 1715.242846] r8168: enp4s0: link down
[ 1729.626331] r8168: enp4s0: link up
[ 1763.400367] r8168: enp4s0: link down
[ 1777.787672] r8168: enp4s0: link up
[ 2138.192663] r8168: enp4s0: link down
[ 2152.571593] r8168: enp4s0: link up
