Ubuntu Debian (All Linux OS) Bug: WIFI randomly disconnected at 100% Signal no internet
System : ubuntu 18.04 LTS Kernel 5.7 amd64
Router openwrt LAN/WIFI: disabled ipv6 dhcp !
Bug: Wifi lost internet connection randomly on 100% Signal beside the Gateway-Router!
Problem: No Error Logs, no Kernel Messages
Tested: Replaced Mini-PCI WIFI 5/6 Cards various Brands ATH9/Intel no fix!!
Replaces Drivers and Power Off Powermanagement of PCI-WIFI! no fix!
Solution:
- edit /etc/sysctl.conf
- insert:
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
Bug Background Info:
- dhcp6 daemon got a expire time of IP Address but fails to renew the handshake and reconnect
- Do always disable IPv6 on Home LAN if not required!