eth0 hangs up every 2-3 seconds
Steps to reproduce:
- connect your computer with docking bar by network cable
- connect docking bar to PP
- (this order is important because there is only few second to connection establish)
- everything works for a while, but then the LEDs go out and you can't reconnect
# journaclctl -f
Jun 02 14:57:45 plasma-mobile systemd-networkd[3419]: eth0: Lost carrier
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.2074] device (eth0): state change: activated -> unavailable (reason 'carrier-changed', sys-iface-state: 'managed')
Jun 02 14:57:51 plasma-mobile dnsmasq[6489]: exiting on receipt of SIGTERM
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.2652] Executing: /usr/bin/iptables --table nat --delete POSTROUTING --source 10.42.0.0/255.255.255.0 ! --destination 10.42.0.0/255.255.255.0 --jump MASQUERADE
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.3026] Executing: /usr/bin/iptables --table filter --delete FORWARD --destination 10.42.0.0/255.255.255.0 --out-interface eth0 --match state --state ESTABLISHED,RELATED --jump ACCEPT
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.3639] Executing: /usr/bin/iptables --table filter --delete FORWARD --source 10.42.0.0/255.255.255.0 --in-interface eth0 --jump ACCEPT
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.3976] Executing: /usr/bin/iptables --table filter --delete FORWARD --in-interface eth0 --out-interface eth0 --jump ACCEPT
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.4278] Executing: /usr/bin/iptables --table filter --delete FORWARD --out-interface eth0 --jump REJECT
Jun 02 14:57:51 plasma-mobile dbus-daemon[3774]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.9' (uid=0 pid=3776 comm="/usr/bin/NetworkManager --no-daemon ")
Jun 02 14:57:51 plasma-mobile systemd[1]: Starting Network Manager Script Dispatcher Service...
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.4784] Executing: /usr/bin/iptables --table filter --delete FORWARD --in-interface eth0 --jump REJECT
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.5128] Executing: /usr/bin/iptables --table filter --delete INPUT --in-interface eth0 --protocol udp --destination-port 67 --jump ACCEPT
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.5429] Executing: /usr/bin/iptables --table filter --delete INPUT --in-interface eth0 --protocol tcp --destination-port 67 --jump ACCEPT
Jun 02 14:57:51 plasma-mobile dbus-daemon[3774]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jun 02 14:57:51 plasma-mobile systemd[1]: Started Network Manager Script Dispatcher Service.
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.5735] Executing: /usr/bin/iptables --table filter --delete INPUT --in-interface eth0 --protocol udp --destination-port 53 --jump ACCEPT
Jun 02 14:57:51 plasma-mobile NetworkManager[3776]: <info> [1622638671.5969] Executing: /usr/bin/iptables --table filter --delete INPUT --in-interface eth0 --protocol tcp --destination-port 53 --jump ACCEPT
Jun 02 14:58:01 plasma-mobile systemd[1]: NetworkManager-dispatcher.service: Deactivated successfully.
$ uname -a
Linux plasma-mobile 5.12.8-2-MANJARO-ARM #1 SMP Mon May 31 15:36:25 UTC 2021 aarch64 GNU/Linux
Tricks:
- connection can be kept alive with
ping -i 2 10.42.0.1
(-i 3 not enough) - device initiation can be triggerd by connecting/disconnecting the power cord to the docking bar
- I am convinced that this is also a bug - it should have no effect to connectivity
🤔
- I am convinced that this is also a bug - it should have no effect to connectivity