Public bug reported: I am experiencing severe intermittent internet connectivity problems on Ubuntu 26.04 with an Intel Wi-Fi 6E AX211 adapter using the iwlwifi driver. I had no problems on this computer using the same wi-fi network until approximately 1 month ago, when this problem was detected.
Expected behavior: Internet connectivity should remain stable when connected to my home Wi-Fi network. Actual behavior: Wi-Fi remains associated with the access point. The local gateway (192.168.0.1) responds reliably, with 0% packet loss in extended testing. Internet connectivity intermittently fails, with packet loss ranging from approximately 13% to 100%. Sometimes the first 10–40 ping packets are lost, followed by a period of successful responses. When i restart ping with ping -c 120 1.1.1.1, packets are lost again at the beginning. DNS resolution can take over 30 seconds. HTTPS connections sometimes time out. The same computer works normally when connected to a mobile phone hotspot or on other wi fi networks, so this might be related to specific network (device). Other computers on the same home Wi-Fi work normally. Hardware and software: Ubuntu 26.04 Intel Wi-Fi 6E AX211 Driver: iwlwifi Firmware reported: 89.123cf747.0 Kernels tested: 7.0.0-34, 7.0.0-38, 7.0.0-42 Both 2.4 GHz and 5 GHz home wireless networks are affected. Troubleshooting performed: Restarted the home router without improvement. Tested multiple Ubuntu kernels. Tested different DNS servers. Disabled and restored Wi-Fi power saving. Tested a randomized MAC address. Checked routing tables and firewall configuration. Confirmed no duplicate IPv4 address during ARP probing. Confirmed local gateway connectivity remains stable during internet outages. Compared available Intel firmware package revisions; firmware files were identical. Additional observations: The issue appeared recently. Kernel logs contain iwlwifi messages including Unhandled alg: 0x703 and 0x400703, although their relationship to the connectivity problem is unknown. Please investigate whether this is an Intel AX211 driver/firmware compatibility issue or a network-stack regression affecting communication with certain access points. Related issues: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2162998 ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-42-generic 7.0.0-42.42 ProcVersionSignature: Ubuntu 7.0.0-42.42-generic 7.0.14 Uname: Linux 7.0.0-42-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: gabert 7064 F.... wireplumber /dev/snd/seq: gabert 7056 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sun Nov 1 20:25:28 2026 InstallationDate: Installed on 2025-03-03 (608 days ago) InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215) MachineType: Dell Inc. Precision 3591 ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-42-generic root=UUID=103e3baa-cc98-4cfb-9c43-1e78ac0e0124 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: Upgraded to resolute on 2026-10-03 (29 days ago) dmi.bios.date: 07/09/2026 dmi.bios.release: 1.25 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.25.1 dmi.board.name: 0VC7JN dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.ec.firmware.release: 1.23 dmi.modalias: dmi:bvnDellInc.:bvr1.25.1:bd07/09/2026:br1.25:efr1.23:svnDellInc.:pnPrecision3591:pvr:rvnDellInc.:rn0VC7JN:rvrA00:cvnDellInc.:ct10:cvr:sku0CBB:pfaPrecision: dmi.product.family: Precision dmi.product.name: Precision 3591 dmi.product.sku: 0CBB dmi.sys.vendor: Dell Inc. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug resolute wayland-session ** Attachment added: "AI generated wifi trouble shooting summary" https://bugs.launchpad.net/bugs/2172730/+attachment/6014201/+files/wifi-trouble-shooting.md -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2172730 Title: Ubuntu 26.04 — Intel AX211 iwlwifi intermittent internet packet loss on home Wi-Fi, hotspot works To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2172730/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
