Lenovo laptop is failing to respond during test runs after upgrading to the 6.14.0-1018-oem kernel.

[Yu-Chi Chu]

[Summary]
During the sru test, I found that a Lenovo laptop is unresponsive over SSH. It still can move the mouse or launch terminal with hot-key, but failed to execute certain commands like sudo reboot, ip a.

The last part of checkbox log was recorded while running Wi-Fi related tests, then the test timed out. wifi module: Mediatek Inc. - 14c3:7925.

[Reproduce steps]
1. Install GM image
2. Run dist-upgrade to upgrade to 6.14-oem kerenl
3. Run checkbox sru test plan

[Failure rate]
1/1

[Affected machines]
https://certification.canonical.com/hardware/202506-36872/

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.14.0-1018-oem 6.14.0-1018.18
ProcVersionSignature: Ubuntu 6.14.0-1018.18-oem 6.14.11
Uname: Linux 6.14.0-1018-oem x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckMismatches: ./casper/initrd ./casper/minimal.standard.live.hotfix.size ./casper/minimal.standard.live.size ./casper/minimal.manifest ./casper/minimal.standard.manifest ./casper/minimal.standard.size ./casper/minimal.hotfix.size ./casper/minimal.standard.live.hotfix.squashfs ./casper/minimal.standard.hotfix.squashfs ./casper/minimal.standard.hotfix.size ./casper/minimal.hotfix.squashfs ./casper/minimal.standard.live.manifest ./casper/minimal.size ./boot/grub/grub.cfg
CasperMD5CheckResult: fail
Date: Wed Jan 7 07:00:02 2026
DistributionChannelDescriptor:
 # This is the distribution channel descriptor for Ubuntu 24.04 for Lenovo
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-sutton-noble-oem-24.04b-20250626-528
InstallationDate: Installed on 2026-01-07 (0 days ago)
InstallationMedia: Ubuntu OEM 24.04.2 LTS "Noble Numbat" - Release amd64 (20250626)
IwConfig:
 lo no wireless extensions.

 enx00e04c680044 no wireless extensions.

 wlp194s0 no wireless extensions.
MachineType: LENOVO 21TCZCZ1CN
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-1018-oem root=UUID=e20e6bc1-049d-4d73-9458-74b990735832 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-6.14.0-1018-oem N/A
 linux-backports-modules-6.14.0-1018-oem N/A
 linux-firmware 20240318.git3b128b60-0ubuntu2.22
SourcePackage: linux-oem-6.14
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/29/2025
dmi.bios.release: 1.5
dmi.bios.vendor: LENOVO
dmi.bios.version: R33ET22W (1.05 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21TCZCZ1CN
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76576 WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.3
dmi.modalias: dmi:bvnLENOVO:bvrR33ET22W(1.05):bd05/29/2025:br1.5:efr1.3:svnLENOVO:pn21TCZCZ1CN:pvrThinkPadT14sGen6:rvnLENOVO:rn21TCZCZ1CN:rvrSDK0T76576WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21TC_BU_Think_FM_ThinkPadT14sGen6:
dmi.product.family: ThinkPad T14s Gen 6
dmi.product.name: 21TCZCZ1CN
dmi.product.sku: LENOVO_MT_21TC_BU_Think_FM_ThinkPad T14s Gen 6
dmi.product.version: ThinkPad T14s Gen 6
dmi.sys.vendor: LENOVO

[Yu-Chi Chu (yuchichu)]

Failed History (Run 1):

---------------------------[ Running job 131 / 196 ]----------------------------
--------[ Connect to a WPA-encrypted 802.11n Wi-Fi network on wlp194s0 ]--------
ID: com.canonical.certification::wireless/wireless_connection_wpa_n_nm_wlp194s0
Category: Wireless networking tests
--------------------------------------------------------------------------------
Interface enx00e04c680044 using module r8152

Checking kernel ring buffer for r8152 messages:
kern :info : [Tue Jan 6 06:49:09 2026] usbcore: registered new device driver r8152-cfgselector
kern :info : [Tue Jan 6 06:49:09 2026] r8152-cfgselector 6-1: reset SuperSpeed USB device number 2 using xhci_hcd
kern :info : [Tue Jan 6 06:49:09 2026] r8152 6-1:1.0 eth0: v1.12.13
kern :info : [Tue Jan 6 06:49:09 2026] usbcore: registered new interface driver r8152
kern :info : [Tue Jan 6 06:49:10 2026] r8152 6-1:1.0 enx00e04c680044: renamed from eth0
kern :info : [Tue Jan 6 06:49:13 2026] r8152 6-1:1.0 enx00e04c680044: carrier on
kern :warn : [Tue Jan 6 07:01:02 2026] Modules linked in: efi_test nvme_fabrics nvme_keyring tls snd_seq_dummy snd_hrtimer snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device r8153_ecm cdc_ether usbnet r8152 mii qrtr binfmt_misc nls_iso8859_1 amd_atl intel_rapl_msr intel_rapl_common amdgpu edac_mce_amd snd_acp_legacy_mach snd_acp_mach snd_soc_nau8821 snd_acp3x_rn snd_acp70 snd_acp_i2s snd_acp_pdm snd_soc_dmic snd_acp_pcm snd_sof_amd_acp70 snd_sof_amd_acp63 snd_sof_amd_vangogh snd_sof_amd_rembrandt snd_sof_amd_renoir snd_sof_amd_acp snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_pci_ps snd_soc_acpi_amd_match snd_amd_sdw_acpi soundwire_amd soundwire_generic_allocation snd_hda_codec_realtek soundwire_bus kvm_amd snd_hda_codec_generic snd_soc_sdca mt7925e snd_hda_scodec_component spd5118 snd_hda_codec_hdmi snd_soc_core mt7925_common kvm mt792x_lib uvcvideo snd_compress ac97_bus mt76_connac_lib snd_pcm_dmaengine videobuf2_vmalloc snd_hda_intel

Interface wlp194s0 using module mt7925e
  Parameters:
    disable_aspm: N

Checking kernel ring buffer for mt7925e messages:
kern :info : [Tue Jan 6 06:49:07 2026] mt7925e 0000:c2:00.0: enabling device (0000 -> 0002)
kern :info : [Tue Jan 6 06:49:07 2026] mt7925e 0000:c2:00.0: ASIC revision: 79250000
kern :info : [Tue Jan 6 06:49:07 2026] mt7925e 0000:c2:00.0: HW/SW Version: 0x8a108a10, Build Time: 20251015212927a
kern :info : [Tue Jan 6 06:49:09 2026] mt7925e 0000:c2:00.0: WM Firmware Version: ____000000, Build Time: 20251015213023
kern :info : [Tue Jan 6 06:49:09 2026] mt7925e 0000:c2:00.0 wlp194s0: renamed from wlan0
kern :warn : [Tue Jan 6 07:01:02 2026] Modules linked in: efi_test nvme_fabrics nvme_keyring tls snd_seq_dummy snd_hrtimer snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device r8153_ecm cdc_ether usbnet r8152 mii qrtr binfmt_misc nls_iso8859_1 amd_atl intel_rapl_msr intel_rapl_common amdgpu edac_mce_amd snd_acp_legacy_mach snd_acp_mach snd_soc_nau8821 snd_acp3x_rn snd_acp70 snd_acp_i2s snd_acp_pdm snd_soc_dmic snd_acp_pcm snd_sof_amd_acp70 snd_sof_amd_acp63 snd_sof_amd_vangogh snd_sof_amd_rembrandt snd_sof_amd_renoir snd_so...

[Yu-Chi Chu (yuchichu)]

journalctl -b -1