I’ve just learnt about journalctl command. These are the last lines of a failed boot:
Feb 28 07:12:05 REDACTED-agv-2022 kernel: BUG: kernel NULL pointer dereference, address: 00000000000001e8
Feb 28 07:12:05 REDACTED-agv-2022 kernel: #PF: supervisor read access in kernel mode
Feb 28 07:12:05 REDACTED-agv-2022 kernel: #PF: error_code(0x0000) - not-present page
Feb 28 07:12:05 REDACTED-agv-2022 kernel: PGD 0 P4D 0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: Oops: 0000 [#1] PREEMPT SMP NOPTI
Feb 28 07:12:06 REDACTED-agv-2022 kernel: CPU: 10 PID: 335 Comm: plymouthd Tainted: P OE 6.8.0-53-generic #55-Ubuntu
Feb 28 07:12:06 REDACTED-agv-2022 kernel: Hardware name: LENOVO 20YM/LNVNB161216, BIOS GXCN36WW 09/15/2021
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RIP: 0010:_nv022439rm+0x85/0x388 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: Code: 00 49 89 c5 48 85 db 0f 84 d8 02 00 00 48 85 d2 0f 84 a7 02 00 00 44 89 e6 48 89 df e8 74 e3 ee ff 48 89 de 4c 89 ef 48 89 c2 <48> 8b 80 e8 01 00 00 e8 ef 16 94 f4 88 45 00 48 8b 83 f8 38 00 00
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RSP: 0018:ffffbc11c0822e60 EFLAGS: 00010282
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RAX: 0000000000000000 RBX: ffffbc11c18b5008 RCX: 0000000000000000
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RDX: 0000000000000000 RSI: ffffbc11c18b5008 RDI: ffff983611080008
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RBP: ffff9835e9fd2aa0 R08: ffff9835e9fd2650 R09: ffff9835e9fd2650
Feb 28 07:12:06 REDACTED-agv-2022 kernel: R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
Feb 28 07:12:06 REDACTED-agv-2022 kernel: R13: ffff983611080008 R14: 0000000000000000 R15: 0000000000000000
Feb 28 07:12:06 REDACTED-agv-2022 kernel: FS: 00007b798e615000(0000) GS:ffff9838be700000(0000) knlGS:0000000000000000
Feb 28 07:12:06 REDACTED-agv-2022 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Feb 28 07:12:06 REDACTED-agv-2022 kernel: CR2: 00000000000001e8 CR3: 00000001013ac000 CR4: 0000000000f50ef0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: PKRU: 55555554
Feb 28 07:12:06 REDACTED-agv-2022 kernel: Call Trace:
Feb 28 07:12:06 REDACTED-agv-2022 kernel: <TASK>
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? show_regs+0x6d/0x80
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __die+0x24/0x80
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? page_fault_oops+0x99/0x1b0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? do_user_addr_fault+0x2e9/0x670
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _raw_spin_lock_irqsave+0xe/0x20
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? exc_page_fault+0x83/0x1b0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? asm_exc_page_fault+0x27/0x30
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv022439rm+0x85/0x388 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv022372rm+0x96/0x230 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv041265rm+0xa7/0x100 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv022832rm+0x191c/0x2cf0 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv021976rm+0x357/0x6d8 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv021976rm+0x1d8/0x6d8 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv045258rm+0x1a1/0x1b0 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv021852rm+0xd9/0x160 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv047220rm+0x377/0x410 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv014159rm+0x3f1/0x690 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv045410rm+0x69/0xd0 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv012638rm+0x86/0xa0 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv000582rm+0x5e/0x70 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? rm_kernel_rmapi_op+0x127/0x213 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? nvidia_modeset_rm_ops_alloc_stack+0x40/0x60 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? nvkms_call_rm+0x4f/0x90 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv002794kms+0x42/0x50 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001116kms+0x35a/0x950 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001314kms+0xdd/0xf0 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001089kms+0x100/0x100 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001307kms+0x15a/0x580 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv014106rm+0xc1/0x130 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001173kms+0xa4/0x660 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv045199rm+0xe9/0x1c0 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __kmalloc+0x1c0/0x4f0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? os_alloc_mem+0xdd/0x100 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? os_alloc_mem+0xdd/0x100 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _raw_spin_lock_irqsave+0xe/0x20
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? os_acquire_spinlock+0x12/0x30 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? os_release_spinlock+0x1a/0x30 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv049855rm+0xed/0x1d0 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv045410rm+0x77/0xd0 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv012638rm+0x86/0xa0 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001299kms+0xa0/0xe0 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001275kms+0x78/0xa0 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001400kms+0x24c/0x260 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001950kms+0x1a/0x30 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001277kms+0x4a9/0x18d0 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __entry_text_end+0x102509/0x10250d
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? os_alloc_mem+0xdd/0x100 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? os_alloc_mem+0xdd/0x100 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv049855rm+0xed/0x1d0 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001187kms+0x233/0x2d0 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? sched_clock_cpu+0x81/0x1e0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001193kms+0xc7/0xe0 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv001308kms+0x15d/0x190 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv002369kms+0x1b9/0x320 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? nvkms_yield+0xe/0x20 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv002834kms+0x80/0xf0 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv002285kms+0x414/0x930 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv000676kms+0x70/0x70 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? vfree+0x34/0x60
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv000676kms+0x70/0x70 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv000676kms+0x48/0x70 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv000669kms+0x6e/0xa0 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? nvKmsIoctl+0xf9/0x270 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _raw_spin_lock_irqsave+0xe/0x20
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? nvkms_ioctl_from_kapi+0x75/0xf0 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? _nv000669kms+0x3a/0x40 [nvidia_modeset]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? nv_drm_master_drop+0x65/0x90 [nvidia_drm]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? drm_dropmaster_ioctl+0xea/0x160
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __pfx_drm_dropmaster_ioctl+0x10/0x10
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? drm_ioctl_kernel+0xbc/0x120
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? drm_ioctl+0x2d4/0x550
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __pfx_drm_dropmaster_ioctl+0x10/0x10
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? nv_drm_ioctl+0x47/0x3f0 [nvidia_drm]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? drm_ioctl_kernel+0xbc/0x120
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __check_object_size.part.0+0x3a/0x150
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __check_object_size+0x23/0x30
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? drm_ioctl+0x304/0x550
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __pfx_drm_version+0x10/0x10
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __x64_sys_ioctl+0xa3/0xf0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? x64_sys_call+0x12a3/0x25a0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? do_syscall_64+0x7f/0x180
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? nv_drm_ioctl+0x47/0x3f0 [nvidia_drm]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __count_memcg_events+0x6b/0x120
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? __x64_sys_ioctl+0xbb/0xf0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? syscall_exit_to_user_mode+0x86/0x260
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? do_syscall_64+0x8c/0x180
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? irqentry_exit+0x43/0x50
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? srso_alias_return_thunk+0x5/0xfbef5
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? exc_page_fault+0x94/0x1b0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ? entry_SYSCALL_64_after_hwframe+0x78/0x80
Feb 28 07:12:06 REDACTED-agv-2022 kernel: </TASK>
Feb 28 07:12:06 REDACTED-agv-2022 kernel: Modules linked in: nvidia_uvm(POE) nvidia_drm(POE) nvidia_modeset(POE) binfmt_misc nls_iso8859_1 intel_rapl_msr intel_rapl_common nvidia(POE) amdgpu snd_hda_codec_realtek snd_hda_codec_generic snd_sof_amd_acp63 snd_hda_codec_hdmi snd_sof_amd_vangogh snd_sof_amd_rembrandt snd_sof_amd_renoir snd_sof_amd_acp snd_sof_pci snd_hda_intel snd_sof_xtensa_dsp snd_sof snd_hda_codec iwlmvm snd_usb_audio snd_sof_utils snd_intel_dspcfg snd_hda_core edac_mce_amd snd_intel_sdw_acpi snd_usbmidi_lib snd_soc_core snd_ump snd_hwdep snd_compress mac80211 ac97_bus snd_seq_midi snd_pcm_dmaengine snd_seq_midi_event snd_pci_ps btusb uvcvideo kvm_amd amdxcp snd_rpl_pci_acp6x snd_rawmidi drm_exec snd_acp_pci btrtl gpu_sched videobuf2_vmalloc btintel snd_acp_legacy_common uvc drm_buddy btbcm snd_pci_acp6x libarc4 videobuf2_memops btmtk snd_seq drm_suballoc_helper snd_pcm videobuf2_v4l2 drm_ttm_helper snd_seq_device iwlwifi kvm snd_timer ttm snd_pci_acp5x videodev drm_display_helper snd_rn_pci_acp3x bluetooth cec irqbypass
Feb 28 07:12:06 REDACTED-agv-2022 kernel: videobuf2_common snd snd_acp_config snd_soc_acpi ecdh_generic think_lmi rc_core rapl cfg80211 mc firmware_attributes_class ecc wmi_bmof i2c_algo_bit i2c_piix4 acpi_als k10temp soundcore snd_pci_acp3x ccp ideapad_laptop industrialio_triggered_buffer kfifo_buf sparse_keymap platform_profile industrialio amd_pmc input_leds joydev mac_hid serio_raw sch_fq_codel msr parport_pc ppdev lp parport efi_pstore nfnetlink dmi_sysfs ip_tables x_tables autofs4 usbhid dm_crypt nvme crct10dif_pclmul crc32_pclmul hid_multitouch sdhci_pci polyval_clmulni nvme_core polyval_generic hid_generic cqhci ucsi_acpi ghash_clmulni_intel xhci_pci sha256_ssse3 sha1_ssse3 typec_ucsi sdhci xhci_pci_renesas nvme_auth typec video i2c_hid_acpi i2c_hid wmi hid aesni_intel crypto_simd cryptd
Feb 28 07:12:06 REDACTED-agv-2022 kernel: CR2: 00000000000001e8
Feb 28 07:12:06 REDACTED-agv-2022 kernel: ---[ end trace 0000000000000000 ]---
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RIP: 0010:_nv022439rm+0x85/0x388 [nvidia]
Feb 28 07:12:06 REDACTED-agv-2022 kernel: Code: 00 49 89 c5 48 85 db 0f 84 d8 02 00 00 48 85 d2 0f 84 a7 02 00 00 44 89 e6 48 89 df e8 74 e3 ee ff 48 89 de 4c 89 ef 48 89 c2 <48> 8b 80 e8 01 00 00 e8 ef 16 94 f4 88 45 00 48 8b 83 f8 38 00 00
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RSP: 0018:ffffbc11c0822e60 EFLAGS: 00010282
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RAX: 0000000000000000 RBX: ffffbc11c18b5008 RCX: 0000000000000000
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RDX: 0000000000000000 RSI: ffffbc11c18b5008 RDI: ffff983611080008
Feb 28 07:12:06 REDACTED-agv-2022 kernel: RBP: ffff9835e9fd2aa0 R08: ffff9835e9fd2650 R09: ffff9835e9fd2650
Feb 28 07:12:06 REDACTED-agv-2022 kernel: R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
Feb 28 07:12:06 REDACTED-agv-2022 kernel: R13: ffff983611080008 R14: 0000000000000000 R15: 0000000000000000
Feb 28 07:12:06 REDACTED-agv-2022 kernel: FS: 00007b798e615000(0000) GS:ffff9838be700000(0000) knlGS:0000000000000000
Feb 28 07:12:06 REDACTED-agv-2022 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Feb 28 07:12:06 REDACTED-agv-2022 kernel: CR2: 00000000000001e8 CR3: 00000001013ac000 CR4: 0000000000f50ef0
Feb 28 07:12:06 REDACTED-agv-2022 kernel: PKRU: 55555554
Feb 28 07:12:06 REDACTED-agv-2022 kernel: note: plymouthd[335] exited with irqs disabled
Feb 28 07:12:49 REDACTED-agv-2022 avahi-daemon[1505]: Successfully dropped root privileges.
Feb 28 07:12:49 REDACTED-agv-2022 avahi-daemon[1505]: avahi-daemon 0.8 starting up.
Feb 28 07:17:04 REDACTED-agv-2022 anacron[1503]: Job `cron.daily' started
Feb 28 07:17:04 REDACTED-agv-2022 anacron[1518]: Updated timestamp for job `cron.daily' to 2025-02-28
Feb 28 07:17:04 REDACTED-agv-2022 anacron[1503]: Job `cron.daily' terminated
Feb 28 07:17:04 REDACTED-agv-2022 anacron[1503]: Normal exit (1 job run)