RPI 3B+. My configuration is as follows: Raspian (buster) 5.4.51-v7+#1333 SMP Mon Aug 10 16:45:19 BST 2020
wlan0 AP, no bridge, fixed IP. wlan1 USB Wifi adapter ppp0 Hologram Nova Modem My application is in the field, so Wifi HotSpots can be unreliable (I can get an IP but can't connect). So I watch to see if I can get to the internet through wlan1 and if I cannot, I switch to cellular. Once on cellular, I look to see if I can get to the Internet via wlan1 (cheaper / faster) by ifconfig wlan1 up. When I do connect, I am sending a lot of data. Hard to pin what actions are triggering the NETDEV WATCHDOG backtrace, but it leaves wlan1 in a state where it cannot come up again: SIOCSIFFLAGS: No such device ip address shows wlan1: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN group default qlen 1000 vcgencmd shows: Aug 6 2020 16:24:09 version af3...d5b337 (clean) (release) (start) Not clear this is the same issue, but I thought I'd report as a use case. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861936 Title: Raspberry Pi 3 network dies shortly after a burst of IPv6 tunnel network load ((lan78xx): transmit queue 0 timed out) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1861936/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
