Public bug reported:
System experiences repeated network transmit queue timeouts using the
r8169 driver with a Realtek RTL8168h/8111h NIC.
Kernel messages:
r8169 0000:04:00.0 enp4s0: NETDEV WATCHDOG: transmit queue 0 timed out
r8169 0000:04:00.0 enp4s0: ASPM disabled on Tx timeout
r8169 0000:04:00.0 enp4s0: rtl_rxtx_empty_cond == 0
Hardware:
Realtek RTL8168h/8111h
Driver: r8169
Observed behavior:
- periodic network stalls/freezes
- watchdog timeout repeats every few minutes
- interface remains up but connectivity becomes unstable
The issue appears related to ASPM/power management because the driver logs:
"ASPM disabled on Tx timeout"
Please investigate possible regressions or ASPM interactions in r8169.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-15-generic 7.0.0-15.15
ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0
Uname: Linux 7.0.0-15-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: safia 4940 F.... wireplumber
/dev/snd/controlC0: safia 4940 F.... wireplumber
/dev/snd/seq: safia 4923 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon May 25 11:21:49 2026
InstallationDate: Installed on 2026-01-12 (133 days ago)
InstallationMedia: Ubuntu 25.10 "Questing Quokka" - Release amd64 (20251007)
MachineType: Gigabyte Technology Co., Ltd. B550M AORUS ELITE
ProcFB: 0 nvidia-drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-15-generic
root=UUID=414b02b6-610f-4cb2-83c5-dd44bea4485f ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
RfKill:
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-05-18 (6 days ago)
dmi.bios.date: 10/28/2025
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: F21
dmi.board.asset.tag: Default string
dmi.board.name: B550M AORUS ELITE
dmi.board.vendor: Gigabyte Technology Co., Ltd.
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.:bvrF21:bd10/28/2025:br5.17:svnGigabyteTechnologyCo.,Ltd.:pnB550MAORUSELITE:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnB550MAORUSELITE:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaB550MB:
dmi.product.family: B550 MB
dmi.product.name: B550M AORUS ELITE
dmi.product.sku: Default string
dmi.product.version: Default string
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2154154
Title:
r8169 RTL8168h/8111h NETDEV WATCHDOG transmit queue timeout
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