Public bug reported:
I experience random kernel panic and lock on boot since kernel 7.0.0-22
at least, but happens also on 7.0.0-27. The kernel 7.0.0-15 seems to be
fine but it would require multiple reboots.
Jul 01 21:10:11 earl kernel: INFO: task kworker/u64:6:187 blocked for more than
122 seconds.
Jul 01 21:10:11 earl kernel: Not tainted 7.0.0-27-generic #27-Ubuntu
Jul 01 21:10:11 earl kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
Jul 01 21:10:11 earl kernel: task:kworker/u64:6 state:D stack:0 pid:187
tgid:187 ppid:2 task_flags:0x4208060 flags:0x00080000
Jul 01 21:10:11 earl kernel: Workqueue: pm pm_runtime_work
Jul 01 21:10:11 earl kernel: Call Trace:
Jul 01 21:10:11 earl kernel: <TASK>
Jul 01 21:10:11 earl kernel: __schedule+0x2b2/0x630
Jul 01 21:10:11 earl kernel: schedule+0x27/0x90
Jul 01 21:10:11 earl kernel: schedule_timeout+0xcf/0x110
Jul 01 21:10:11 earl kernel: wait_for_completion+0x81/0x140
Jul 01 21:10:11 earl kernel: __flush_work+0x270/0x3c0
Jul 01 21:10:11 earl kernel: ? __pfx_wq_barrier_func+0x10/0x10
Jul 01 21:10:11 earl kernel: ? __pfx_pci_pm_runtime_suspend+0x10/0x10
Jul 01 21:10:11 earl kernel: flush_work+0x21/0x30
Jul 01 21:10:11 earl kernel: tb_ring_stop+0xd9/0x200 [thunderbolt]
Jul 01 21:10:11 earl kernel: ? tb_switch_suspend+0x167/0x1b0 [thunderbolt]
Jul 01 21:10:11 earl kernel: tb_ctl_stop+0x3c/0x100 [thunderbolt]
Jul 01 21:10:11 earl kernel: ? tb_runtime_suspend+0x5c/0x70 [thunderbolt]
Jul 01 21:10:11 earl kernel: tb_domain_runtime_suspend+0x3a/0x50 [thunderbolt]
Jul 01 21:10:11 earl kernel: nhi_runtime_suspend+0x1f/0x50 [thunderbolt]
Jul 01 21:10:11 earl kernel: pci_pm_runtime_suspend+0x6a/0x1a0
Jul 01 21:10:11 earl kernel: __rpm_callback+0x4b/0x1f0
Jul 01 21:10:11 earl kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Jul 01 21:10:11 earl kernel: ? ktime_get_mono_fast_ns+0x36/0xe0
Jul 01 21:10:11 earl kernel: ? __pfx_pci_pm_runtime_suspend+0x10/0x10
Jul 01 21:10:11 earl kernel: rpm_callback+0x77/0x80
Jul 01 21:10:11 earl kernel: rpm_suspend+0xe1/0x610
Jul 01 21:10:11 earl kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Jul 01 21:10:11 earl kernel: rpm_idle+0x247/0x360
Jul 01 21:10:11 earl kernel: pm_runtime_work+0x8d/0xa0
Jul 01 21:10:11 earl kernel: process_one_work+0x1ac/0x3d0
Jul 01 21:10:11 earl kernel: worker_thread+0x1b8/0x360
Jul 01 21:10:11 earl kernel: ? __pfx_worker_thread+0x10/0x10
Jul 01 21:10:11 earl kernel: kthread+0xf7/0x130
Jul 01 21:10:11 earl kernel: ? __pfx_kthread+0x10/0x10
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-27-generic 7.0.0-27.27
ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6
Uname: Linux 7.0.0-27-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 1 21:19:59 2026
InstallationDate: Installed on 2025-04-12 (445 days ago)
InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215)
MachineType: LENOVO 21K3S0DS00
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-27-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro amdgpu.dcdebugmask=0x8000 quiet
splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-05-19 (43 days ago)
dmi.bios.date: 03/19/2026
dmi.bios.release: 1.49
dmi.bios.vendor: LENOVO
dmi.bios.version: R2FET69W (1.49 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21K3S0DS00
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.33
dmi.modalias:
dmi:bvnLENOVO:bvrR2FET69W(1.49):bd03/19/2026:br1.49:efr1.33:svnLENOVO:pn21K3S0DS00:pvrThinkPadT14Gen4:rvnLENOVO:rn21K3S0DS00:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21K3_BU_Think_FM_ThinkPadT14Gen4:pfaThinkPadT14Gen4:
dmi.product.family: ThinkPad T14 Gen 4
dmi.product.name: 21K3S0DS00
dmi.product.sku: LENOVO_MT_21K3_BU_Think_FM_ThinkPad T14 Gen 4
dmi.product.version: ThinkPad T14 Gen 4
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
** Attachment added: "kernel_lpxxxx_ubuntu7.0.0-27-boot-freeze.log"
https://bugs.launchpad.net/bugs/2158928/+attachment/5979767/+files/kernel_lpxxxx_ubuntu7.0.0-27-boot-freeze.log
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https://bugs.launchpad.net/bugs/2158928
Title:
Thinkpad T14 gen4 AMD: Frequent kernel panics on boot since 7.0.0-22
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