Public bug reported:
After upgrading to Kubuntu 25.10 (kernel 6.17), the mt7925e WiFi driver
fails to respond to incoming ARP requests on boot, making the system
unreachable from other network devices. The network only becomes
accessible after running any command that triggers ARP activity (e.g.,
arping), even if that command itself times out.
Hardware:
- Network controller: MEDIATEK Corp. Device 7925
- Driver: mt7925e
- Interface: wlp129s0 (WiFi)
Symptoms:
- Other devices cannot ping this PC after boot
- Ping returns "Destination Host Unreachable" with "sendmsg: No route to host"
- Once this PC pings another device, bidirectional connectivity is restored
- Running `sudo arping -c 3 -I wlp129s0 -U <ip>` (even though it times out)
fixes the connectivity
Workaround:
Created systemd service running arping on boot, which resolves the issue.
This appears to be an ARP responder initialization bug introduced in
kernel 6.17 or the updated mt7925e driver.
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: linux-image-6.17.0-6-generic 6.17.0-6.6
ProcVersionSignature: Ubuntu 6.17.0-6.6-generic 6.17.1
Uname: Linux 6.17.0-6-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Thu Oct 30 20:45:22 2025
InstallationDate: Installed on 2025-09-28 (32 days ago)
InstallationMedia: Kubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
IwDevWlx28ad18ed4c25Link: Not connected.
MachineType: Gigabyte Technology Co., Ltd. Z890 AORUS ELITE WIFI7
ProcFB: 0 nvidia-drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.17.0-6-generic
root=UUID=7d6555c4-3bda-4857-9daf-ae09f134f3cc ro quiet splash
nvidia.NVreg_PreserveVideoMemoryAllocations=1 vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
firmware-sof N/A
linux-firmware 20250901.git993ff19b-0ubuntu1.2
SourcePackage: linux
UpgradeStatus: Upgraded to questing on 2025-10-30 (0 days ago)
dmi.bios.date: 06/26/2025
dmi.bios.release: 5.32
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: F17d
dmi.board.asset.tag: Default string
dmi.board.name: Z890 AORUS ELITE WIFI7
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
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.:bvrF17d:bd06/26/2025:br5.32:svnGigabyteTechnologyCo.,Ltd.:pnZ890AORUSELITEWIFI7:pvr-CF-WCP-IDO:rvnGigabyteTechnologyCo.,Ltd.:rnZ890AORUSELITEWIFI7:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:
dmi.product.family: Z890 MB
dmi.product.name: Z890 AORUS ELITE WIFI7
dmi.product.sku: Default string
dmi.product.version: -CF-WCP-IDO
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug questing wayland-session
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https://bugs.launchpad.net/bugs/2130371
Title:
mt7925e WiFi driver fails to respond to ARP requests until triggered
(kernel 6.17)
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