Public bug reported:
== Summary ==
Kernel 7.0.0-15-generic causes a kernel panic with "System is deadlocked on
memory" message when the system attempts to suspend (S3/deep sleep).
Kernel 7.0.0-14-generic suspends and resumes correctly with identical hardware
and driver configuration.
== Hardware ==
Dell XPS 15 9560
CPU: Intel Core i7-7700HQ
GPU: NVIDIA GeForce GTX 1050 Mobile (driver 580.142) + Intel HD Graphics 630
(i915)
RAM: 16 GB
== Steps to reproduce ==
1. Boot with kernel 7.0.0-15-generic
2. Initiate suspend via: systemctl suspend
3. System enters suspend (PM: suspend entry (s2idle or deep))
4. Kernel panic occurs — Caps Lock LED blinks, system does not resume
5. kdump captures the crash and reboots automatically
== Expected behavior ==
System suspends and resumes cleanly, as it does with kernel
7.0.0-14-generic.
== Actual behavior ==
Kernel panic: "System is deadlocked on memory" during suspend.
System cannot resume; requires hard reboot via kdump.
== Kernel parameters (GRUB_CMDLINE_LINUX_DEFAULT) ==
mem_sleep_default=deep intel_iommu=on iommu=pt pci=noaer nmi_watchdog=1
== NVIDIA configuration ==
Driver: 580.142 (nvidia-driver-580)
/etc/modprobe.d/nvidia-graphics-drivers-kms.conf:
options nvidia NVreg_PreserveVideoMemoryAllocations=1
options nvidia NVreg_TemporaryFilePath=/var
nvidia-suspend.service: enabled
nvidia-resume.service: enabled
nvidia-hibernate.service: enabled
== Workaround ==
Booting with kernel 7.0.0-14-generic resolves the issue completely.
Current workaround: pinned 7.0.0-14-generic via apt-mark hold.
== Last kernel log entry before panic ==
kernel: PM: suspend entry (s2idle)
(system does not produce further journal entries — kdump triggers reboot)
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-14-generic 7.0.0-14.14
ProcVersionSignature: Ubuntu 7.0.0-14.14-generic 7.0.0
Uname: Linux 7.0.0-14-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alex 2773 F.... wireplumber
/dev/snd/controlC2: alex 2773 F.... wireplumber
/dev/snd/controlC1: alex 2773 F.... wireplumber
/dev/snd/seq: alex 2760 F.... pipewire
CasperMD5CheckMismatches: ./boot/grub/i386-pc/eltorito.img
CasperMD5CheckResult: fail
CurrentDesktop: ubuntu:GNOME
Date: Sat May 9 12:29:52 2026
InstallationDate: Installed on 2026-03-27 (43 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Daily amd64 (20260327)
MachineType: Dell Inc. XPS 15 9560
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=/@/boot/vmlinuz-7.0.0-14-generic
root=UUID=97002894-4c3b-4a00-b203-4f6898c1e988 ro rootflags=subvol=@
mem_sleep_default=deep intel_iommu=on iommu=pt pci=noaer nmi_watchdog=1
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: 11/10/2022
dmi.bios.release: 1.31
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.31.0
dmi.board.name: 05FFDN
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.31.0:bd11/10/2022:br1.31:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn05FFDN:rvrA00:cvnDellInc.:ct10:cvr:sku07BE:pfaXPS:
dmi.product.family: XPS
dmi.product.name: XPS 15 9560
dmi.product.sku: 07BE
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/2152086
Title:
kernel 7.0.0-15-generic: kernel panic "System is deadlocked on memory"
on suspend with NVIDIA 580 driver (regression from 7.0.0-14)
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