Public bug reported:
[Summary]
Since upgrading to linux-image-7.0.0-31-generic (7.0.0-31.31, resolute-updates,
installed 2026-09-07) the laptop hangs completely under sustained load: display
goes black, no keyboard/mouse/SysRq/network response, power-cycle required. 4
hangs between 2026-09-11 and 2026-09-14, each 20-55 min into the workload.
Booting linux-image-7.0.0-30-generic (7.0.0-30.30) with the identical workload:
no hang.
[Hardware]
ASUS Vivobook 16 X1607CA, BIOS X1607CA.308 (2025-05-22)
Intel Meteor Lake, iGPU i915 0000:00:02.0 (device 7d51), 16 CPUs, 30 GiB RAM,
17 GiB swap
GuC 70.53.0, DMC 2.23, HuC 8.5.4 (linux-firmware 20260319.git217ca6e4.1ubuntu,
unchanged since March)
[Steps to reproduce]
1. Boot 7.0.0-31-generic.
2. Run 2 or more parallel heavy build workloads (Gradle JVM builds + Docker
containers, ~4-5 load average on 16 CPUs, memory never above ~50%).
3. Within 20-55 min the system hangs hard.
Same steps on 7.0.0-30-generic: no hang (>1 h, repeated).
[What was checked]
- Not memory pressure: a 2 s sampler shows 14 GiB available and 0 B swap 2 s
before the hang (attached).
- Not a kernel panic: kdump-tools active with crashkernel reserved, no vmcore
written; NMI watchdog enabled, yet the journal simply stops with no
oops/lockup/RCU stall message (attached).
- i915.enable_psr=0 on the command line: no effect.
- No thermal or OOM events in the journal.
[Workaround]
Pin GRUB to 7.0.0-30-generic.
[Attachments]
freeze-bug-attachments.tar.gz: full journal of the boot that hung at 2026-09-14
10:21:52, kernel log of the 10:09:51 hang, sampler output from the last seconds.
I can test kernel builds or a bisected series on this machine.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-30-generic 7.0.0-30.30
ProcVersionSignature: Ubuntu 7.0.0-30.30-generic 7.0.12
Uname: Linux 7.0.0-30-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: francois 6327 F.... wireplumber
/dev/snd/controlC0: francois 6303 F.... pipewire
francois 6327 F.... wireplumber
/dev/snd/seq: francois 6303 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 14 13:01:44 2026
InstallationDate: Installed on 2026-05-06 (131 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
IwDevWlp1s0Link: Not connected.
MachineType: ASUSTeK COMPUTER INC. ASUS Vivobook 16 X1607CA_X1607CA
ProcEnviron:
LANG=fr_FR.UTF-8
PATH=(custom, no user)
SHELL=/bin/zsh
TERM=tmux-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-30-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash rootdelay=10
i915.enable_psr=0
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: 05/22/2025
dmi.bios.release: 5.32
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: X1607CA.308
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X1607CA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.ec.firmware.release: 3.6
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrX1607CA.308:bd05/22/2025:br5.32:efr3.6:svnASUSTeKCOMPUTERINC.:pnASUSVivobook16X1607CA_X1607CA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX1607CA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:pfaASUSVivobook16:
dmi.product.family: ASUS Vivobook 16
dmi.product.name: ASUS Vivobook 16 X1607CA_X1607CA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: regression-update
** Attachment added: "freeze-bug-attachments.tar.gz"
https://bugs.launchpad.net/bugs/2167231/+attachment/6000115/+files/freeze-bug-attachments.tar.gz
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https://bugs.launchpad.net/bugs/2167231
Title:
Regression 7.0.0-30 -> 7.0.0-31: hard system hang (black screen, no
oops, no vmcore) under sustained multi-process load on Intel Meteor
Lake
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