** Description changed: System: HP ZBook Firefly G8 laptop, Intel Iris Xe / Tiger Lake graphics, Xubuntu/Ubuntu 26.04. Problem: The system intermittently hard-locks and requires forced power-off. The power LED remains on, the system becomes completely unresponsive, and previous crashes showed Caps Lock LED flickering/blinking. This is not a normal application crash or clean shutdown. Latest crash: On 2026-06-18 the boot ended abruptly at 10:59:06 MDT. The next boot started at 11:00:45 MDT. kdump was enabled and reported ready, with crashkernel memory reserved, but no vmcore was captured. /var/crash contained only kdump_lock and kexec_cmd for the hard lock. This suggests a hard hang/deadlock rather than a clean kernel panic. Kernel/debug configuration at time of crash: The system was booted with: zswap.enabled=1 i915.enable_psr=0 i915.enable_dc=0 i915.enable_fbc=0 drm.debug=0x1e log_buf_len=4M XFCE compositor was already disabled. Intel OpenCL packages had been removed. The crash therefore appears unrelated to compositor effects or OpenCL workloads. Observed kernel evidence: The final kernel messages before logging stopped repeatedly show i915 / DRM atomic cursor-plane updates on the same pipe/plane: [CRTC:584:pipe D] with [PLANE:578:cursor D] drm_atomic_set_fb_for_plane intel_plane_atomic_calc_changes visible 1 -> 1, off 0, on 0, ms 0 The same cursor D / pipe D messages repeat continuously at the final timestamp, 2026-06-18 10:59:06, until logging stops. No clean shutdown, panic, oops, or vmcore was captured. Earlier related crash evidence: Previous crashes also pointed at Intel i915 / DRM display handling, including stack traces involving: - i915_hotplug_work_func [i915] - drm_kms_helper_connector_hotplug_event - drm_atomic_commit - intel_atomic_commit - intel_audio_codec_disable Expected result: The system should remain responsive during normal desktop use. Actual result: The system hard-locks and requires forced power-off, risking data loss. Impact: High/severe. Full system lockup. Suspected area: Intel i915 / DRM atomic modesetting, specifically hardware cursor plane handling on pipe D. External display/dock involvement is possible but not fully proven. Next test: I will force Xorg software cursor using the modesetting driver option SWCursor=true. If this stops the crashes, I will update the bug because the final logs currently point strongly at the hardware cursor plane path. + + imwheel was running because without it the mouse wheel does not work + correctly in QGIS on this system. It may increase scroll/input event + handling, but it is a user-space X11 tool and should not be able to + hard-lock the kernel. The final kernel logs point to i915 DRM cursor- + plane updates. Attachments provided: - previous-boot-kernel-full.txt - previous-boot-kernel-filtered.txt - previous-boot-end.txt - boots.txt - cmdline.txt - uname.txt - version_signature.txt - lspci-vvnn.txt - xrandr.txt - kdump-status.txt - var-crash-files.txt - system-product.txt - bios-version.txt - bios-release-date.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 2889 F.... pipewire notabrick 2898 F.... wireplumber /dev/snd/controlC1: notabrick 2898 F.... wireplumber /dev/snd/seq: notabrick 2889 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: XFCE Date: Thu Jun 18 11:11:29 2026 InstallationDate: Installed on 2026-05-10 (39 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 i915.enable_fbc=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
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2157524 Title: HP ZBook Firefly G8 hard lock in Intel i915 DRM atomic cursor plane path To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2157524/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
