Public bug reported:
System Information
Model: Dell Pro 14 Premium PA14250
CPU: Intel(R) Core(TM) Ultra 7 268V
GPU: Intel Corporation Lunar Lake [Intel Graphics] (rev 04)
Working kernel:
6.14.0-27-generic
Broken kernel:
6.17.0-14-generic
Ubuntu version:
Ubuntu 24.04.3 LTS (noble)
Same thing happens on 24.04.4 LTS
Steps to Reproduce:
1.
Perform fresh Ubuntu 24.04 installation with LUKS, wihtout internet (works
correctly).
2.
Run:
sudo apt update
sudo apt upgrade
3.
Reboot into new HWE kernel (6.17.0-14).
4.
Enter LUKS disk password.
5.
System displays “decrypting…” message.
6.
Immediately after decryption completes, the system freezes visually.
Observed Behavior:
- Decryption succeeds.
- Root filesystem mounts successfully.
- Boot continues.
- Display freezes (spinner stops).
- System appears unresponsive.
- Closing and reopening laptop lid restores display.
- After resume, system works normally until next reboot.
Expected Behavior:
System should transition from initramfs (LUKS unlock) to graphical login
without requiring suspend/resume.
Additional Observations:
- Problem does not occur if HWE kernel meta packages are held:
sudo apt-mark hold linux-generic-hwe-24.04 linux-image-generic-hwe-24.04
linux-headers-generic-hwe-24.04
- System remains stable when staying on kernel 6.14.
- Issue occurs immediately after upgrading to kernel 6.17.
- Fresh installation without running "apt upgrade" does not show the problem.
- Appears related to display / DRM / KMS reinitialization after initramfs.
- Suspend/resume likely reinitializes GPU and restores display pipeline.
Regression
Confirmed regression between:
Working: 6.14.0-27-generic
Broken: 6.17.0-14-generic
Impact
This affects clean deployments using:
linux-generic-hwe-24.04
Triggered by normal apt upgrade.
Systems appear frozen at every boot.
The issue resembles a KMS / i915 regression after kernel upgrade.
Suspend/resume restores display state, suggesting GPU initialization
issue during boot handoff from initramfs to userspace.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.14.0-27-generic 6.14.0-27.27~24.04.1
ProcVersionSignature: Ubuntu 6.14.0-27.27~24.04.1-generic 6.14.6
Uname: Linux 6.14.0-27-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path',
'/dev/snd/controlC0', '/dev/snd/hwC0D2', '/dev/snd/pcmC0D31p',
'/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D4c',
'/dev/snd/pcmC0D2p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D6p',
'/dev/snd/pcmC0D5p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: N/A
CasperMD5CheckResult: pass
Date: Tue Feb 17 12:32:13 2026
InstallationDate: Installed on 2026-02-17 (0 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
IwConfig:
lo no wireless extensions.
enx144fd7c7ccca no wireless extensions.
wlp0s20f3 no wireless extensions.
MachineType: Dell Inc. Dell Pro 14 Premium PA14250
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 xedrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.14.0-27-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-6.14.0-27-generic N/A
linux-backports-modules-6.14.0-27-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.23
SourcePackage: linux-hwe-6.14
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/13/2026
dmi.bios.release: 2.10
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.10.1
dmi.board.name: 0NGT53
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.ec.firmware.release: 1.19
dmi.modalias:
dmi:bvnDellInc.:bvr2.10.1:bd01/13/2026:br2.10:efr1.19:svnDellInc.:pnDellPro14PremiumPA14250:pvr:rvnDellInc.:rn0NGT53:rvrA01:cvnDellInc.:ct10:cvr:sku0CE4:
dmi.product.family: Dell Pro Laptops
dmi.product.name: Dell Pro 14 Premium PA14250
dmi.product.sku: 0CE4
dmi.sys.vendor: Dell Inc.
** Affects: linux-hwe-6.14 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2142012
Title:
Ubuntu 24.04 HWE 6.17: System freezes after LUKS unlock until
suspend/resume (Dell + Intel iGPU)
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https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.14/+bug/2142012/+subscriptions
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