I could not determine exactly which part was having the problems, seems to me the dhcp client package or API to network-managers.
To this ubuntu develop/changes much on parts the network management handling ubuntu go other ways than other Debian/Linux OS. If Company's disable IPV6 on local LAN for easy Firewall-Security-Handling, they will run into problems. I know IPv6 should be implemented but on small Areas it makes less sense. Users have still Problems on "easy" managing IPv6. They wont use small Routers to route local devices to the Internernet Provider's IPv6-DHCP Servers. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/2000001 Title: Wifi 5/6 dropped randomly if ipv6 is enabled - Bug dhcp6!!! Status in dhcp package in Ubuntu: New Status in dhcpcd package in Ubuntu: New Status in dhcpcd5 package in Ubuntu: New Status in isc-dhcp package in Ubuntu: New Status in network-manager package in Ubuntu: New Status in network-manager-applet package in Ubuntu: New Status in wicd package in Ubuntu: New Bug description: Updated: 19.12.2022 ##################### Hi Support at startup of analysis: Wifi5/6 dropped randomly if ipv6 is enabled/disabled on gnome-network-manager-gui no Error on Logs! No red Kernel Messages. My Lab: At my Lab i disabled all ipv6 on my Subnet LAN Openwrt-Routers, and my Laptop loses "randomly" 20times a day the Internet but the Signal is 100% to the WIFI-Routers, no ping, no nslookup to first DSL-WAN Router possible. First Handling: After i manual enable/disable WIFI by switch is works again fast. Analysis: After some search on Net i disabled ipv6 in sysctl.conf ! GTK-Apps Affected: seen on network-manager/network-manager-gnome/wicd Managers Hardware Change/Test: I tested / changed 3 different old wifi-5+ new wifi-6 intel AX 7260 HMW mini-pci-cards same problem! Now testing again.. Thanks Linuxonlinehelp_eu ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: network-manager 1.10.6-2ubuntu1.4 ProcVersionSignature: Ubuntu 5.4.0-135.152~18.04.2-generic 5.4.212 Uname: Linux 5.4.0-135-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.9-0ubuntu7.28 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sun Dec 18 11:24:20 2022 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2021-08-19 (486 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) IpRoute: default via 192.168.71.1 dev wlp3s0b1 proto dhcp metric 600 169.254.0.0/16 dev wlp3s0b1 scope link metric 1000 192.168.71.0/24 dev wlp3s0b1 proto kernel scope link src 192.168.71.123 metric 600 NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: http_proxy: http://127.0.0.1:8118/ modified.conffile..etc.NetworkManager.conf.d.default-wifi-powersave-on.conf: [connection] wifi.powersave = 2 mtime.conffile..etc.NetworkManager.conf.d.default-wifi-powersave-on.conf: 2022-06-30T19:17:37.737049 nmcli-dev: DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH wlp3s0b1 wifi connected /org/freedesktop/NetworkManager/Devices/3 AXWIFI71 bec4545b-24e6-40ef-a933-43121b9b819b /org/freedesktop/NetworkManager/ActiveConnection/3 enp2s0 ethernet unavailable /org/freedesktop/NetworkManager/Devices/2 -- -- -- lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 -- -- -- nmcli-nm: RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN running 1.10.6 connected started full enabled enabled enabled enabled enabled no_proxy: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dhcp/+bug/2000001/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp