Public bug reported:
After re-opening laptop, network manager / wpa supplicant 100% CPU
usage. No network.
iwlwifi 0000:02:00.0: Failed to get monitor header
iwlwifi 0000:02:00.0: WRT: Failed to fill region header
worker/u16:15:7016 is blocked on a mutex likely owned by task
wpa_supplicant:1961
Only began to encounter this today. Show-stopping issue.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-31-generic 7.0.0-31.31
ProcVersionSignature: Ubuntu 7.0.0-31.31-generic 7.0.14
Uname: Linux 7.0.0-31-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: randy 3767 F.... wireplumber
/dev/snd/seq: randy 3763 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 8 15:30:39 2026
InstallationDate: Installed on 2026-05-01 (131 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0c45:6717 Microdia Integrated_Webcam_HD
Bus 001 Device 004: ID 0a5c:5832 Broadcom Corp. BCM5880 Secure Applications
Processor Smartcard reader
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 413c:81b6 Dell Computer Corp. DW5811e Snapdragon™ X7 LTE
MachineType: Dell Inc. Latitude 7480
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=/vmlinuz-7.0.0-31-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/05/2024
dmi.bios.release: 1.40
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.40.0
dmi.board.name: 0F48ND
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.40.0:bd11/05/2024:br1.40:svnDellInc.:pnLatitude7480:pvr:rvnDellInc.:rn0F48ND:rvrA02:cvnDellInc.:ct10:cvr:sku07A0:pfaLatitude:
dmi.product.family: Latitude
dmi.product.name: Latitude 7480
dmi.product.sku: 07A0
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2166810
Title:
iwlwifi hanging after monitor lid shut and opened again
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