Ubuntu
linux-oem-5.6 package

System freeze

Bug #1919425 reported by kailoran
12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
linux-oem-5.6 (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

I've been getting freezes on Ubuntu 20.04 on my Dell Latitude 7420 laptop with a secondary display connected through a WD19 Dell dock. I'm on the supposedly-certified 5.6.0-1048-oem kernel, have tried 5.8 and 5.10 without much success (other types of freezes). Some freezes lock up the machine hard with no way to ssh in or check anything and no logs. The one below I was able to ssh in and dump dmesg, rebooting via ssh froze and I had to do a hard reboot.

[ 7557.306199] BUG: unable to handle page fault for address: ffff8ceca8900758
[ 7557.306206] #PF: supervisor write access in kernel mode
[ 7557.306209] #PF: error_code(0x0002) - not-present page
[ 7557.306211] PGD 39601067 P4D 39601067 PUD 0
[ 7557.306217] Oops: 0002 [#1] SMP NOPTI
[ 7557.306221] CPU: 4 PID: 6181 Comm: chrome Tainted: G W O 5.6.0-1048-oem #52-Ubuntu
[ 7557.306223] Hardware name: Dell Inc. Latitude 7420/095TWY, BIOS 1.3.5 01/18/2021
[ 7557.306231] RIP: 0010:remove_wait_queue+0x25/0x50
[ 7557.306235] Code: 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 54 49 89 fc 53 48 89 f3 e8 f9 e2 a1 00 48 8b 53 18 4c 89 e7 48 89 c6 48 8b 43 20 <48> 89 42 08 48 89 10 48 b8 00 01 00 00 00 00 ad de 48 89 43 18 48
[ 7557.306237] RSP: 0018:ffffb14e015cba78 EFLAGS: 00010046
[ 7557.306240] RAX: ffff8caca8900750 RBX: ffffb14e015cbc80 RCX: 0000000000000001
[ 7557.306242] RDX: ffff8ceca8900750 RSI: 0000000000000282 RDI: ffff8caca8900748
[ 7557.306244] RBP: ffffb14e015cba88 R08: ffff8cac52a2c000 R09: 0000000000000003
[ 7557.306245] R10: 0000000000000084 R11: fffffffffffb159a R12: ffff8caca8900748
[ 7557.306247] R13: 0000000000000000 R14: ffffb14e015cbc70 R15: 0000000000000001
[ 7557.306250] FS: 00007f137ff04d80(0000) GS:ffff8cacaf700000(0000) knlGS:0000000000000000
[ 7557.306252] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7557.306254] CR2: ffff8ceca8900758 CR3: 00000007ee554005 CR4: 0000000000760ee0
[ 7557.306255] PKRU: 55555554
[ 7557.306257] Call Trace:
[ 7557.306265] poll_freewait+0x42/0xa0
[ 7557.306268] do_sys_poll+0x480/0x520
[ 7557.306275] ? poll_select_finish+0x210/0x210
[ 7557.306278] ? poll_select_finish+0x210/0x210
[ 7557.306282] ? poll_select_finish+0x210/0x210
[ 7557.306284] ? poll_select_finish+0x210/0x210
[ 7557.306287] ? poll_select_finish+0x210/0x210
[ 7557.306292] ? fput+0x13/0x15
[ 7557.306296] ? __sys_sendto+0x153/0x190
[ 7557.306300] ? __fget_light+0x62/0x80
[ 7557.306303] ? fput+0x13/0x15
[ 7557.306306] ? __sys_recvmsg+0x88/0xa0
[ 7557.306310] ? ktime_get_ts64+0x4c/0xe0
[ 7557.306313] __x64_sys_poll+0xa5/0x140
[ 7557.306319] do_syscall_64+0x57/0x1b0
[ 7557.306324] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 7557.306328] RIP: 0033:0x7f1381360aff
[ 7557.306330] Code: 54 24 1c 48 89 74 24 10 48 89 7c 24 08 e8 79 1c f8 ff 8b 54 24 1c 48 8b 74 24 10 41 89 c0 48 8b 7c 24 08 b8 07 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2b 44 89 c7 89 44 24 08 e8 ad 1c f8 ff 8b 44
[ 7557.306332] RSP: 002b:00007fff0cd693d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000007
[ 7557.306335] RAX: ffffffffffffffda RBX: 00007f13828e60d0 RCX: 00007f1381360aff
[ 7557.306336] RDX: 0000000000000ea1 RSI: 0000000000000005 RDI: 0000377ea82ca210
[ 7557.306338] RBP: 0000377ea82ca210 R08: 0000000000000000 R09: 0000000000000001
[ 7557.306339] R10: 0000377ea8b40460 R11: 0000000000000293 R12: 0000000000000005
[ 7557.306341] R13: 00007fff0cd69414 R14: 0000000000000ea1 R15: 0000377ea6d9bd10
[ 7557.306346] Modules linked in: rfcomm vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ccm typec_displayport cmac algif_hash algif_skcipher af_alg bnep binfmt_misc nls_iso8859_1 snd_hda_codec_hdmi snd_sof_pci snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_xtensa_dsp snd_sof_intel_hda snd_sof snd_hda_ext_core snd_soc_acpi_intel_match snd_hda_codec_realtek snd_hda_codec_generic snd_soc_acpi dell_laptop mei_hdcp intel_rapl_msr ledtrig_audio snd_hda_intel snd_intel_dspcfg x86_pkg_temp_thermal intel_powerclamp soundwire_intel soundwire_generic_allocation coretemp soundwire_cadence snd_hda_codec kvm_intel kvm snd_hda_core soundwire_bus dell_wmi intel_cstate snd_soc_core snd_compress dell_smbios ac97_bus serio_raw snd_pcm_dmaengine dcdbas snd_usb_audio dell_wmi_descriptor snd_usbmidi_lib snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event wmi_bmof uvcvideo snd_rawmidi videobuf2_vmalloc snd_seq videobuf2_memops snd_seq_device snd_timer videobuf2_v4l2 joydev btusb cdc_ether snd input_leds videobuf2_common
[ 7557.306386] btrtl usbnet soundcore btbcm iwlmvm videodev btintel mac80211 r8152 mc libarc4 mii bluetooth ecdh_generic ecc iwlwifi hid_sensor_accel_3d hid_sensor_gyro_3d hid_sensor_als hid_sensor_trigger cfg80211 industrialio_triggered_buffer kfifo_buf mei_me hid_sensor_iio_common industrialio ucsi_acpi mei hid_multitouch processor_thermal_device intel_rapl_common cros_ec_ishtp typec_ucsi cros_ec intel_soc_dts_iosf typec soc_button_array int3403_thermal int340x_thermal_zone mac_hid int3400_thermal acpi_tad acpi_thermal_rel acpi_pad intel_hid sparse_keymap sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 dm_crypt hid_logitech_hidpp hid_logitech_dj usbhid hid_sensor_custom hid_sensor_hub hid_generic intel_ishtp_loader intel_ishtp_hid rtsx_pci_sdmmc i915 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel i2c_algo_bit drm_kms_helper aesni_intel syscopyarea sysfillrect crypto_simd sysimgblt cryptd fb_sys_fops glue_helper psmouse ahci i2c_i801 rtsx_pci cec libahci rc_core
[ 7557.306426] intel_lpss_pci intel_lpss drm thunderbolt nvme idma64 intel_ish_ipc virt_dma nvme_core intel_ishtp wmi i2c_hid hid video pinctrl_tigerlake pinctrl_intel
[ 7557.306439] CR2: ffff8ceca8900758
[ 7557.306442] ---[ end trace 66be81a329a3fc59 ]---
[ 7557.306446] RIP: 0010:remove_wait_queue+0x25/0x50
[ 7557.306448] Code: 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 54 49 89 fc 53 48 89 f3 e8 f9 e2 a1 00 48 8b 53 18 4c 89 e7 48 89 c6 48 8b 43 20 <48> 89 42 08 48 89 10 48 b8 00 01 00 00 00 00 ad de 48 89 43 18 48
[ 7557.306450] RSP: 0018:ffffb14e015cba78 EFLAGS: 00010046
[ 7557.306452] RAX: ffff8caca8900750 RBX: ffffb14e015cbc80 RCX: 0000000000000001
[ 7557.306454] RDX: ffff8ceca8900750 RSI: 0000000000000282 RDI: ffff8caca8900748
[ 7557.306455] RBP: ffffb14e015cba88 R08: ffff8cac52a2c000 R09: 0000000000000003
[ 7557.306457] R10: 0000000000000084 R11: fffffffffffb159a R12: ffff8caca8900748
[ 7557.306459] R13: 0000000000000000 R14: ffffb14e015cbc70 R15: 0000000000000001
[ 7557.306461] FS: 00007f137ff04d80(0000) GS:ffff8cacaf700000(0000) knlGS:0000000000000000
[ 7557.306463] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7557.306465] CR2: ffff8ceca8900758 CR3: 00000007ee554005 CR4: 0000000000760ee0
[ 7557.306466] PKRU: 55555554
[ 7570.600849] BUG: unable to handle page fault for address: ffffb14e015cbd18
[ 7570.600854] #PF: supervisor read access in kernel mode
[ 7570.600856] #PF: error_code(0x0000) - not-present page
[ 7570.600858] PGD 86c02c067 P4D 86c02c067 PUD 86c02d067 PMD 859525067 PTE 0
[ 7570.600863] Oops: 0000 [#2] SMP NOPTI
[ 7570.600867] CPU: 7 PID: 2417 Comm: Xorg Tainted: G D W O 5.6.0-1048-oem #52-Ubuntu
[ 7570.600869] Hardware name: Dell Inc. Latitude 7420/095TWY, BIOS 1.3.5 01/18/2021
[ 7570.600877] RIP: 0010:__wake_up_common+0x55/0x140
[ 7570.600881] Code: 41 f6 01 04 0f 85 a2 00 00 00 48 8b 43 08 48 8d 78 e8 48 8d 43 08 48 89 45 d0 48 89 c1 48 8d 47 18 48 39 c1 0f 84 b7 00 00 00 <48> 8b 47 18 89 55 c8 45 31 e4 48 8d 58 e8 44 8b 2f 41 f6 c5 04 75
[ 7570.600883] RSP: 0018:ffffb14e02ea7b48 EFLAGS: 00010083
[ 7570.600886] RAX: ffffb14e015cbd18 RBX: ffff8cac575dadc0 RCX: ffff8cac575dadc8
[ 7570.600888] RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffb14e015cbd00
[ 7570.600889] RBP: ffffb14e02ea7b88 R08: 00000000000000c3 R09: ffffb14e02ea7ba0
[ 7570.600891] R10: ffff8cac595bb800 R11: 0000000040000000 R12: 0000000000000001
[ 7570.600893] R13: 0000000000000246 R14: 0000000000000001 R15: 00000000000000c3
[ 7570.600895] FS: 00007f394b3a7a40(0000) GS:ffff8cacaf7c0000(0000) knlGS:0000000000000000
[ 7570.600897] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7570.600899] CR2: ffffb14e015cbd18 CR3: 0000000818bd8006 CR4: 0000000000760ee0
[ 7570.600901] PKRU: 55555554
[ 7570.600902] Call Trace:
[ 7570.600909] __wake_up_common_lock+0x7c/0xc0
[ 7570.600914] __wake_up_sync_key+0x20/0x30
[ 7570.600919] sock_def_readable+0x3b/0x70
[ 7570.600924] unix_stream_sendmsg+0x148/0x410
[ 7570.600930] sock_sendmsg+0x65/0x70
[ 7570.600933] sock_write_iter+0x93/0xf0
[ 7570.600939] do_iter_readv_writev+0x14f/0x1d0
[ 7570.600942] do_iter_write+0x84/0x1a0
[ 7570.600946] vfs_writev+0xa6/0xf0
[ 7570.600950] ? vfs_read+0x12e/0x160
[ 7570.600953] do_writev+0xe5/0x120
[ 7570.600956] ? ksys_read+0xce/0xe0
[ 7570.600960] __x64_sys_writev+0x1c/0x20
[ 7570.600964] do_syscall_64+0x57/0x1b0
[ 7570.600970] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 7570.600973] RIP: 0033:0x7f394b70761d
[ 7570.600975] Code: 28 89 54 24 1c 48 89 74 24 10 89 7c 24 08 e8 5a 01 f8 ff 8b 54 24 1c 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2f 44 89 c7 48 89 44 24 08 e8 8e 01 f8 ff 48
[ 7570.600977] RSP: 002b:00007ffe4b88bdc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
[ 7570.600980] RAX: ffffffffffffffda RBX: 00005610b42cf770 RCX: 00007f394b70761d
[ 7570.600981] RDX: 0000000000000001 RSI: 00007ffe4b88c0b0 RDI: 000000000000001f
[ 7570.600983] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
[ 7570.600984] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
[ 7570.600986] R13: 00007ffe4b88c0b0 R14: 0000000000000000 R15: 00007f394b3a76c0
[ 7570.600991] Modules linked in: rfcomm vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ccm typec_displayport cmac algif_hash algif_skcipher af_alg bnep binfmt_misc nls_iso8859_1 snd_hda_codec_hdmi snd_sof_pci snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_xtensa_dsp snd_sof_intel_hda snd_sof snd_hda_ext_core snd_soc_acpi_intel_match snd_hda_codec_realtek snd_hda_codec_generic snd_soc_acpi dell_laptop mei_hdcp intel_rapl_msr ledtrig_audio snd_hda_intel snd_intel_dspcfg x86_pkg_temp_thermal intel_powerclamp soundwire_intel soundwire_generic_allocation coretemp soundwire_cadence snd_hda_codec kvm_intel kvm snd_hda_core soundwire_bus dell_wmi intel_cstate snd_soc_core snd_compress dell_smbios ac97_bus serio_raw snd_pcm_dmaengine dcdbas snd_usb_audio dell_wmi_descriptor snd_usbmidi_lib snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event wmi_bmof uvcvideo snd_rawmidi videobuf2_vmalloc snd_seq videobuf2_memops snd_seq_device snd_timer videobuf2_v4l2 joydev btusb cdc_ether snd input_leds videobuf2_common
[ 7570.601029] btrtl usbnet soundcore btbcm iwlmvm videodev btintel mac80211 r8152 mc libarc4 mii bluetooth ecdh_generic ecc iwlwifi hid_sensor_accel_3d hid_sensor_gyro_3d hid_sensor_als hid_sensor_trigger cfg80211 industrialio_triggered_buffer kfifo_buf mei_me hid_sensor_iio_common industrialio ucsi_acpi mei hid_multitouch processor_thermal_device intel_rapl_common cros_ec_ishtp typec_ucsi cros_ec intel_soc_dts_iosf typec soc_button_array int3403_thermal int340x_thermal_zone mac_hid int3400_thermal acpi_tad acpi_thermal_rel acpi_pad intel_hid sparse_keymap sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 dm_crypt hid_logitech_hidpp hid_logitech_dj usbhid hid_sensor_custom hid_sensor_hub hid_generic intel_ishtp_loader intel_ishtp_hid rtsx_pci_sdmmc i915 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel i2c_algo_bit drm_kms_helper aesni_intel syscopyarea sysfillrect crypto_simd sysimgblt cryptd fb_sys_fops glue_helper psmouse ahci i2c_i801 rtsx_pci cec libahci rc_core
[ 7570.601068] intel_lpss_pci intel_lpss drm thunderbolt nvme idma64 intel_ish_ipc virt_dma nvme_core intel_ishtp wmi i2c_hid hid video pinctrl_tigerlake pinctrl_intel
[ 7570.601081] CR2: ffffb14e015cbd18
[ 7570.601084] ---[ end trace 66be81a329a3fc5a ]---
[ 7570.601088] RIP: 0010:remove_wait_queue+0x25/0x50
[ 7570.601090] Code: 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 54 49 89 fc 53 48 89 f3 e8 f9 e2 a1 00 48 8b 53 18 4c 89 e7 48 89 c6 48 8b 43 20 <48> 89 42 08 48 89 10 48 b8 00 01 00 00 00 00 ad de 48 89 43 18 48
[ 7570.601092] RSP: 0018:ffffb14e015cba78 EFLAGS: 00010046
[ 7570.601094] RAX: ffff8caca8900750 RBX: ffffb14e015cbc80 RCX: 0000000000000001
[ 7570.601095] RDX: ffff8ceca8900750 RSI: 0000000000000282 RDI: ffff8caca8900748
[ 7570.601097] RBP: ffffb14e015cba88 R08: ffff8cac52a2c000 R09: 0000000000000003
[ 7570.601099] R10: 0000000000000084 R11: fffffffffffb159a R12: ffff8caca8900748
[ 7570.601100] R13: 0000000000000000 R14: ffffb14e015cbc70 R15: 0000000000000001
[ 7570.601103] FS: 00007f394b3a7a40(0000) GS:ffff8cacaf7c0000(0000) knlGS:0000000000000000
[ 7570.601104] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7570.601106] CR2: ffffb14e015cbd18 CR3: 0000000818bd8006 CR4: 0000000000760ee0
[ 7570.601108] PKRU: 55555554

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.6.0-1048.52-oem 5.6.19
Uname: Linux 5.6.0-1048-oem x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Mar 17 09:37:01 2021
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus: virtualbox, 6.1.16, 5.6.0-1048-oem, x86_64: installed
GpuHangFrequency: Several times a week
GpuHangReproducibility: Occurs more often under certain circumstances
GpuHangStarted: Immediately after installing this version of Ubuntu
GraphicsCard:
 Intel Corporation Device [8086:9a49] (rev 01) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:0a36]
InstallationDate: Installed on 2021-02-27 (17 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
MachineType: Dell Inc. Latitude 7420
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.6.0-1048-oem root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/18/2021
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.3.5
dmi.board.name: 095TWY
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.3.5:bd01/18/2021:svnDellInc.:pnLatitude7420:pvr:rvnDellInc.:rn095TWY:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Latitude
dmi.product.name: Latitude 7420
dmi.product.sku: 0A36
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.2.6-0ubuntu0.20.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

See original description
Revision history for this message
kailoran (kailoran) wrote :
Daniel van Vugt (vanvugt)
summary: - Xorg freeze
+ System freeze
affects: xorg (Ubuntu) → linux (Ubuntu)
affects: linux (Ubuntu) → linux-oem-5.6 (Ubuntu)
Revision history for this message
kailoran (kailoran) wrote :

I also got a similar freeze on 5.10.0-1016-oem (from linux-image-oem-20.04-edge), was also able to ssh in, and got a similar dmesg:

BUG: unable to handle page fault for address: ffffffefba9d49e3)
...

I had this running for longer, and what followed were CPU lockup logs like

watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [gst-plugin-scan:16404]
...
NMI watchdog: Watchdog detected hard LOCKUP on cpu 6
...

attached in full as dmesg-page-fault-cpu-lockup.txt

description: updated
Revision history for this message
Guilherme G. Piccoli (gpiccoli) wrote :

Thanks for the report! Can you both boot the machine fresh and enable oops_backtrace, by executing "echo 1 | sudo tee /proc/sys/kernel/oops_all_cpu_backtrace" ? Then I'll need the full dmesg, after the issue happens, as kailoran updated.

If that is not enough we might need a kdump later.
Thanks in advance,

Guilherme

Revision history for this message
kailoran (kailoran) wrote :

It's just me twice on two different kernels ;)

I'll try doing that. Might takie a while to get a repro since I'm also trying to (a) see if not having the external monitor / connecting it differently helps (b) do actual work on that machine. I'll reply when I have something.

Revision history for this message
kailoran (kailoran) wrote :

/proc/sys/kernel/oops_all_cpu_backtrace seems unavailable in 5.6 (added in 5.8 per a quick search). I'll switch to 5.10 again and try there.

Revision history for this message
Guilherme G. Piccoli (gpiccoli) wrote :

Thanks kailoran, indeed it was added after 5.6 - my goal was the test on 5.10, I should have been more clear about that heheh
Cheers!

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in linux-oem-5.6 (Ubuntu):
status: New → Confirmed
Revision history for this message
kailoran (kailoran) wrote :

As an update, it's now been roughly a week with no freezes or crashes for me. I have not changed my usage pattern: same dock, same external display, devices, etc., and same applications used. I did change one thing however. When I was switching again to the linux-image-oem-20.04-edge I decided to reinstall it just to be sure. I spotted a post-install warning I didn't notice previously:

  update-initramfs: Generating /boot/initrd.img-5.10.0-1016-oem
  W: Possible missing firmware /lib/firmware/i915/tgl_huc_7.5.0.bin for module i915
  W: Possible missing firmware /lib/firmware/i915/tgl_huc_7.5.0.bin for module i915

I indeed did not have tgl_huc_7.5.0.bin on my machine, despite having linux-firmware installed. It did not seem available in any installable package, so I decided to grab this one file from a newer debian package (it was added upstream a few months back) and reinstalled again with it in place. There was no update-initramfs warning this time, and I haven't had a freeze since.

It could be a coincidence of course, but maybe the kernel/firmware relationship is related.

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