Public bug reported:
System: HP ZBook Firefly G8 laptop, Intel Iris Xe / Tiger Lake graphics,
Xubuntu/Ubuntu 26.04, kernel 7.0.0-22-generic.
Problem:
The system hard-locks and requires a forced power-off. The power LED remains
on, the system is completely unresponsive, and in earlier crashes the Caps Lock
LED flickered/blinked. This is not a normal application crash or clean shutdown.
The issue has occurred more than once. It previously appeared related to
Intel i915/DRM display handling. Earlier logs showed a stack trace
involving:
- i915_hotplug_work_func [i915]
- drm_kms_helper_connector_hotplug_event
- drm_atomic_commit
- intel_atomic_commit
- intel_audio_codec_disable
For the latest crash, kdump was enabled and reported ready, and
crashkernel memory was reserved, but no vmcore was captured. /var/crash
only contained kdump_lock and kexec_cmd. This suggests a hard
hang/deadlock rather than a clean kernel panic.
Current boot/debug parameters:
zswap.enabled=1 i915.enable_psr=0 i915.enable_dc=0 drm.debug=0x1e log_buf_len=4M
After the next reboot I also added:
i915.enable_fbc=0
The XFCE compositor was already disabled when the crash occurred. I had
previously installed Intel OpenCL packages but removed them; this crash
appears to be in the kernel DRM/i915 display path, not an OpenCL compute
workload.
Programs running: Qgis 3.44, firefox with Gmail on one tab and youtube
playing music on another, Chrome browser with multiple tabs open
my setup has 4 displays running simultaneously, laptop built in + HDIM +
2 connected to a lenovo usbC dock using alt mode (the dock is also
providing power, network and connecting to my keyboard and mouse)
I was also listening to music via a bluetooth headset
Latest observed evidence:
The previous boot ended abruptly. With drm.debug=0x1e enabled, the final kernel
messages before the lockup show repeated i915/DRM atomic display activity,
including atomic cursor/plane updates such as drm_atomic_set_fb_for_plane,
intel_plane_atomic_calc_changes, drm_atomic_commit, and CRTC/cursor plane
references. There was no clean shutdown, no vmcore, and no obvious
storage/NVMe/MCE error in the captured evidence.
External display/dock involvement is suspected but not fully proven.
Earlier evidence pointed more clearly at display hotplug/modesetting;
the latest crash looked more like atomic cursor/plane activity before
the lockup.
Expected result:
System should remain responsive and not hard-lock during normal desktop use.
Actual result:
System hard-locks and requires forced power-off.
Impact:
This is severe because it causes full system lockup and possible data loss.
I have attached:
- previous-boot-kernel-full.txt
- previous-boot-kernel-filtered.txt
- previous-boot-end.txt
- boots.txt
- cmdline.txt
- uname.txt
- kdump-status.txt
- var-crash-files.txt
- system-product.txt
- bios-version.txt
- bios-release-date.txt
- xrandr-after-reboot.txt
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-22-generic 7.0.0-22.22
ProcVersionSignature: Ubuntu 7.0.0-22.22-generic 7.0.0
Uname: Linux 7.0.0-22-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: notabrick 2578 F.... pipewire
notabrick 2592 F.... wireplumber
/dev/snd/controlC1: notabrick 2592 F.... wireplumber
/dev/snd/seq: notabrick 2578 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Wed Jun 10 10:46:23 2026
InstallationDate: Installed on 2026-05-10 (31 days ago)
InstallationMedia: Xubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: HP HP ZBook Firefly 14 inch G8 Mobile Workstation PC
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-22-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash zswap.enabled=1
i915.enable_psr=0 i915.enable_dc=0 drm.debug=0x1e log_buf_len=4M
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: 03/06/2026
dmi.bios.release: 24.1
dmi.bios.vendor: HP
dmi.bios.version: T76 Ver. 01.24.01
dmi.board.name: 880D
dmi.board.vendor: HP
dmi.board.version: KBC Version 30.57.00
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.ec.firmware.release: 48.87
dmi.modalias:
dmi:bvnHP:bvrT76Ver.01.24.01:bd03/06/2026:br24.1:efr48.87:svnHP:pnHPZBookFirefly14inchG8MobileWorkstationPC:pvrSBKPFV3:rvnHP:rn880D:rvrKBCVersion30.57.00:cvnHP:ct10:cvr:sku3V328UT#ABA:pfa103C_5336ANHPZBook:
dmi.product.family: 103C_5336AN HP ZBook
dmi.product.name: HP ZBook Firefly 14 inch G8 Mobile Workstation PC
dmi.product.sku: 3V328UT#ABA
dmi.product.version: SBKPFV3
dmi.sys.vendor: HP
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute
** Attachment added: "crash-bug-report.tar.gz"
https://bugs.launchpad.net/bugs/2156374/+attachment/5976696/+files/crash-bug-report.tar.gz
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https://bugs.launchpad.net/bugs/2156374
Title:
HP ZBook Firefly G8 hard lockup in Intel i915/DRM atomic display path
on 7.0.0-22-generic
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