Public bug reported:
Ubuntu 24.04.4 LTS repeatedly loses network connectivity because the
Intel AX200 iwlwifi firmware crashes and performs a software reset.
Expected result:
The wireless adapter should remain connected and pass traffic normally when
NetworkManager Wi-Fi power saving is enabled.
Actual result:
The firmware repeatedly crashes, sometimes approximately every 15 seconds. DNS
lookups and IPv4/IPv6 HTTPS connections time out during each reset.
Relevant kernel messages:
iwlwifi 0000:02:00.0: Microcode SW error detected. Restarting 0x0.
iwlwifi 0000:02:00.0: Loaded firmware version: 77.f39cc7f9.0 cc-a0-77.ucode
iwlwifi 0000:02:00.0: 0x00000084 | NMI_INTERRUPT_UNKNOWN
iwlwifi 0000:02:00.0: 0x0144001C | hcmd
iwlwifi 0000:02:00.0: Device error - SW reset
iwlwifi 0000:02:00.0: restart completed
Hardware/software:
- System: PELADN HA-4
- Wireless adapter: Intel Wi-Fi 6 AX200, PCI ID 8086:2723 rev 1a
- Driver: iwlwifi
- Kernel: 7.0.0-30-generic
- Firmware: 77.f39cc7f9.0 cc-a0-77.ucode
- linux-firmware: 20240318.git3b128b60-0ubuntu2.29
- Access point: WPA2, 5 GHz, channel 44
- Signal strength: 100 percent
The current boot accumulated 75 firmware crashes before applying the
workaround. A previous long-running boot recorded 1,836 crashes. The issue was
also observed with Ubuntu kernels in the
6.17 and 7.0 series and firmware revisions 77.b405f9d4.0 and 77.f39cc7f9.0.
Before workaround:
- HTTPS: 10 succeeded and 5 timed out
- Some DNS lookups failed
- IPv6 test showed 40 percent packet loss
- Both IPv4 and IPv6 were affected
- Routes, DHCP, gateway and DNS assignments were correct
Workaround:
I disabled Wi-Fi power saving in the NetworkManager profile and reconnected:
nmcli connection modify <connection-profile> 802-11-wireless.powersave 2
After reconnecting:
- HTTPS: 40/40 succeeded
- DNS: 10/10 succeeded
- IPv6: 20/20 packets received, 0 percent loss, approximately 18 ms average
latency
- No additional iwlwifi firmware resets occurred during the stress test and
observation period
The final reset occurred immediately before NetworkManager activated the
connection with power saving disabled. This strong before/after result suggests
a power-state or access-point
interaction in iwlwifi or its firmware.
The hostname, SSID, network addresses, MAC addresses, connection UUID
and serial identifiers have intentionally been omitted from this
description.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-7.0.0-30-generic 7.0.0-30.30~24.04.1
ProcVersionSignature: Ubuntu 7.0.0-30.30~24.04.1-generic 7.0.12
Uname: Linux 7.0.0-30-generic x86_64
ApportVersion: 2.28.2-0ubuntu0.1
Architecture: amd64
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 23 14:20:03 2026
HibernationDevice: resume=UUID=b4be5fba-ce21-4e2c-91fe-a19d47541f47
resume_offset=4872192
InstallationDate: Installed on 2025-08-30 (358 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
MachineType: PELADN HA-4
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-30-generic
root=UUID=b4be5fba-ce21-4e2c-91fe-a19d47541f47 ro quiet splash
resume=UUID=b4be5fba-ce21-4e2c-91fe-a19d47541f47 resume_offset=4872192
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-7.0.0-30-generic N/A
linux-backports-modules-7.0.0-30-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.29
SourcePackage: linux-hwe-7.0
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/27/2023
dmi.bios.release: 5.29
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: FP750PE702
dmi.board.asset.tag: Default string
dmi.board.name: HA-4
dmi.board.vendor: PELADN
dmi.board.version: Default string
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrFP750PE702:bd11/27/2023:br5.29:svnPELADN:pnHA-4:pvrDefaultstring:rvnPELADN:rnHA-4:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaDefaultstring:
dmi.product.family: Default string
dmi.product.name: HA-4
dmi.product.sku: Default string
dmi.product.version: Default string
dmi.sys.vendor: PELADN
** Affects: linux-hwe-7.0 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
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https://bugs.launchpad.net/bugs/2164855
Title:
Intel AX200 iwlwifi firmware repeatedly resets when Wi-Fi power saving
is enabled
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