[BUG] Deadlock in hailo_pci driver on Raspberry Pi 5 (Kernel 6.12.x)

General
1

After upgrading my Raspberry Pi 5 to kernel 6.12.x, I am experiencing a deadlock in the hailo_pci driver when running my custom pose estimation script. The system hangs after a few seconds. The official Hailo demos still work without issues. This problem did not occur with previous kernel versions.

  • Hardware: Raspberry Pi 5, Hailo8 PCIe
  • Kernel: 6.12.x (e.g. 6.12.30-v8-16k+)
  • /etc/modprobe.d/hailo_pci.conf is present
  • The official Hailo demos run without issues
==== Hailo Bugreport Info ====
Datum: Mi 4. Jun 13:47:09 CEST 2025

== Hailo SDK/Tools Version ==
HailoRT-CLI version 4.20.0
ii  hailo-all                              4.20.0                              all          Hailo support (metapackage)
ii  hailo-tappas-core                      3.31.0+1-1                          arm64        This package contains the core components of the Hailo Tappas platform.
ii  hailofw                                4.20.0-1                            all          Hailo firmware
ii  hailort                                4.20.0-1                            arm64        HailoRT
ii  python3-hailort                        4.20.0-1                            arm64        HailoRT Python API, which wraps the runtime library
ii  rpicam-apps-hailo-postprocess          1.7.0-1                             arm64        rpicam-apps-hailo

== PCIe Info ==
0001:03:00.0 Co-processor [0b40]: Hailo Technologies Ltd. Hailo-8 AI Processor [1e60:2864] (rev 01)

== Kernel & System ==
Linux raspi5 6.12.30-v8-16k+ #1879 SMP PREEMPT Fri May 23 13:30:44 BST 2025 aarch64 GNU/Linux
PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

== Hailo Treiber Status ==
hailo_pci             131072  2
filename:       /lib/modules/6.12.30-v8-16k+/kernel/drivers/media/pci/hailo/hailo_pci.ko.xz
version:        4.20.0
license:        GPL v2
description:    Hailo PCIe driver
author:         Hailo Technologies Ltd.
import_ns:      DMA_BUF
srcversion:     E8ED835F8D6D454EABB6BF8
alias:          pci:v00001E60d000043A2sv*sd*bc*sc*i*
alias:          pci:v00001E60d000045C4sv*sd*bc*sc*i*
alias:          pci:v00001E60d00002864sv*sd*bc*sc*i*
depends:        
intree:         Y
name:           hailo_pci
vermagic:       6.12.30-v8-16k+ SMP preempt mod_unload modversions aarch64
parm:           o_dbg:int
parm:           no_power_mode:Disables automatic D0->D3 PCIe transactions (invbool)
parm:           force_allocation_from_driver:Determines whether to force buffer allocation from driver or userspace (int)
parm:           force_desc_page_size:Determines the maximum DMA descriptor page size (must be a power of 2) (int)
parm:           force_hailo10h_legacy_mode:Forces work with Hailo10h in legacy mode(relevant for emulators) (bool)
parm:           force_boot_linux_from_eemc:Boot the linux image from eemc (Requires special Image) (bool)
parm:           support_soft_reset:enables driver reload to reload a new firmware as well (bool)

== Hailo PCIe dmesg ==
[    1.891557] hailo: Init module. driver version 4.20.0
[    1.891641] hailo 0001:03:00.0: Probing on: 1e60:2864...
[    1.891644] hailo 0001:03:00.0: Probing: Allocate memory for device extension, 13184
[    1.891696] hailo 0001:03:00.0: enabling device (0000 -> 0002)
[    1.891704] hailo 0001:03:00.0: Probing: Device enabled
[    1.891718] hailo 0001:03:00.0: Probing: mapped bar 0 - 0000000000b8df9c 16384
[    1.891722] hailo 0001:03:00.0: Probing: mapped bar 2 - 0000000028d70111 4096
[    1.891725] hailo 0001:03:00.0: Probing: mapped bar 4 - 00000000b7fad923 16384
[    1.891728] hailo 0001:03:00.0: Probing: Force setting max_desc_page_size to 4096 (recommended value is 16384)
[    1.891735] hailo 0001:03:00.0: Probing: Enabled 64 bit dma
[    1.891738] hailo 0001:03:00.0: Probing: Using userspace allocated vdma buffers
[    1.891742] hailo 0001:03:00.0: Disabling ASPM L0s 
[    1.891746] hailo 0001:03:00.0: Successfully disabled ASPM L0s 
[    1.897740] hailo 0001:03:00.0: Writing file hailo/hailo8_fw.bin
[    1.989079] hailo 0001:03:00.0: File hailo/hailo8_fw.bin written successfully
[    1.989089] hailo 0001:03:00.0: Writing file hailo/hailo8_board_cfg.bin
[    1.989118] Failed to write file hailo/hailo8_board_cfg.bin
[    1.989120] hailo 0001:03:00.0: File hailo/hailo8_board_cfg.bin written successfully
[    1.989122] hailo 0001:03:00.0: Writing file hailo/hailo8_fw_cfg.bin
[    1.989128] Failed to write file hailo/hailo8_fw_cfg.bin
[    1.989130] hailo 0001:03:00.0: File hailo/hailo8_fw_cfg.bin written successfully
[    2.080487] hailo 0001:03:00.0: NNC Firmware loaded successfully
[    2.080495] hailo 0001:03:00.0: FW loaded, took 182 ms
[    2.093684] hailo 0001:03:00.0: Probing: Added board 1e60-2864, /dev/hailo0
[ 9305.083002] INFO: task Hailo Pose Esti:36253 blocked for more than 120 seconds.
[ 9305.083013] task:Hailo Pose Esti state:D stack:0     pid:36253 tgid:36235 ppid:23020  flags:0x00000004
[ 9305.083042]  hailo_vdma_buffer_map+0x3c8/0x6b0 [hailo_pci]
[ 9305.083050]  hailo_vdma_buffer_map_ioctl+0xcc/0x348 [hailo_pci]
[ 9305.083054]  hailo_vdma_ioctl+0x254/0x2a8 [hailo_pci]
[ 9305.083058]  hailo_pcie_fops_unlockedioctl+0x16c/0x7e8 [hailo_pci]
[ 9425.915267] INFO: task Hailo Pose Esti:36253 blocked for more than 241 seconds.
[ 9425.915282] task:Hailo Pose Esti state:D stack:0     pid:36253 tgid:36235 ppid:23020  flags:0x00000004
[ 9425.915324]  hailo_vdma_buffer_map+0x3c8/0x6b0 [hailo_pci]
[ 9425.915335]  hailo_vdma_buffer_map_ioctl+0xcc/0x348 [hailo_pci]
[ 9425.915341]  hailo_vdma_ioctl+0x254/0x2a8 [hailo_pci]
[ 9425.915347]  hailo_pcie_fops_unlockedioctl+0x16c/0x7e8 [hailo_pci]
[ 9526.980424] hailo: get_user_pages failed with -4
[ 9526.980434] hailo 0001:03:00.0: failed to set sg list for user buffer -4
[ 9526.980438] hailo 0001:03:00.0: failed map buffer 7fff5015c000

== Aktuelle Kernel-Fehler (dmesg) ==
[  261.412971] rp1-cfe 1f00110000.csi: Using a link rate of 900 Mbps
[  279.478745] usb 3-1: new full-speed USB device number 3 using xhci-hcd
[  279.637450] usb 3-1: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.64
[  279.637458] usb 3-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[  279.637461] usb 3-1: Product: USB Serial
[  279.697864] usbcore: registered new interface driver usbserial_generic
[  279.697879] usbserial: USB Serial support registered for generic
[  279.699584] usbcore: registered new interface driver ch341
[  279.699626] usbserial: USB Serial support registered for ch341-uart
[  279.699675] ch341 3-1:1.0: ch341-uart converter detected
[  279.712528] usb 3-1: ch341-uart converter now attached to ttyUSB0
[  300.716714] rp1-cfe 1f00110000.csi: Using a link rate of 900 Mbps
[  304.572600] rp1-cfe 1f00110000.csi: Using a link rate of 900 Mbps
[  323.911856] rp1-cfe 1f00110000.csi: Using a link rate of 900 Mbps
[ 9098.546669] rp1-cfe 1f00110000.csi: Using a link rate of 900 Mbps
[ 9305.083002] INFO: task Hailo Pose Esti:36253 blocked for more than 120 seconds.
[ 9305.083010]       Tainted: G         C         6.12.30-v8-16k+ #1879
[ 9305.083012] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 9305.083013] task:Hailo Pose Esti state:D stack:0     pid:36253 tgid:36235 ppid:23020  flags:0x00000004
[ 9305.083018] Call trace:
[ 9305.083019]  __switch_to+0xf0/0x160
[ 9305.083027]  __schedule+0x32c/0xb60
[ 9305.083031]  schedule+0x3c/0x148
[ 9305.083034]  schedule_preempt_disabled+0x2c/0x50
[ 9305.083037]  rwsem_down_read_slowpath+0x1e0/0x510
[ 9305.083040]  down_read+0xb0/0xc0
[ 9305.083042]  hailo_vdma_buffer_map+0x3c8/0x6b0 [hailo_pci]
[ 9305.083050]  hailo_vdma_buffer_map_ioctl+0xcc/0x348 [hailo_pci]
[ 9305.083054]  hailo_vdma_ioctl+0x254/0x2a8 [hailo_pci]
[ 9305.083058]  hailo_pcie_fops_unlockedioctl+0x16c/0x7e8 [hailo_pci]
[ 9305.083062]  __arm64_sys_ioctl+0xb0/0x100
[ 9305.083066]  invoke_syscall+0x50/0x120
[ 9305.083071]  el0_svc_common.constprop.0+0x48/0xf8
[ 9305.083075]  do_el0_svc+0x28/0x40
[ 9305.083077]  el0_svc+0x30/0xd0
[ 9305.083080]  el0t_64_sync_handler+0x13c/0x158
[ 9305.083083]  el0t_64_sync+0x190/0x198
[ 9305.083089] INFO: task pool-python:36297 blocked for more than 120 seconds.
[ 9305.083091]       Tainted: G         C         6.12.30-v8-16k+ #1879
[ 9305.083092] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 9305.083093] task:pool-python     state:D stack:0     pid:36297 tgid:36235 ppid:23020  flags:0x00000004
[ 9305.083096] Call trace:
[ 9305.083097]  __switch_to+0xf0/0x160
[ 9305.083101]  __schedule+0x32c/0xb60
[ 9305.083104]  schedule+0x3c/0x148
[ 9305.083107]  schedule_preempt_disabled+0x2c/0x50
[ 9305.083110]  rwsem_down_read_slowpath+0x1e0/0x510
[ 9305.083112]  down_read+0xb0/0xc0
[ 9305.083114]  do_madvise.part.0+0x190/0xad8
[ 9305.083117]  __arm64_sys_madvise+0x54/0x78
[ 9305.083119]  invoke_syscall+0x50/0x120
[ 9305.083122]  el0_svc_common.constprop.0+0x48/0xf8
[ 9305.083125]  do_el0_svc+0x28/0x40
[ 9305.083128]  el0_svc+0x30/0xd0
[ 9305.083130]  el0t_64_sync_handler+0x13c/0x158
[ 9305.083133]  el0t_64_sync+0x190/0x198
[ 9425.915267] INFO: task Hailo Pose Esti:36253 blocked for more than 241 seconds.
[ 9425.915277]       Tainted: G         C         6.12.30-v8-16k+ #1879
[ 9425.915280] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 9425.915282] task:Hailo Pose Esti state:D stack:0     pid:36253 tgid:36235 ppid:23020  flags:0x00000004
[ 9425.915289] Call trace:
[ 9425.915291]  __switch_to+0xf0/0x160
[ 9425.915301]  __schedule+0x32c/0xb60
[ 9425.915307]  schedule+0x3c/0x148
[ 9425.915312]  schedule_preempt_disabled+0x2c/0x50
[ 9425.915317]  rwsem_down_read_slowpath+0x1e0/0x510
[ 9425.915321]  down_read+0xb0/0xc0
[ 9425.915324]  hailo_vdma_buffer_map+0x3c8/0x6b0 [hailo_pci]
[ 9425.915335]  hailo_vdma_buffer_map_ioctl+0xcc/0x348 [hailo_pci]
[ 9425.915341]  hailo_vdma_ioctl+0x254/0x2a8 [hailo_pci]
[ 9425.915347]  hailo_pcie_fops_unlockedioctl+0x16c/0x7e8 [hailo_pci]
[ 9425.915353]  __arm64_sys_ioctl+0xb0/0x100
[ 9425.915359]  invoke_syscall+0x50/0x120
[ 9425.915366]  el0_svc_common.constprop.0+0x48/0xf8
[ 9425.915371]  do_el0_svc+0x28/0x40
[ 9425.915375]  el0_svc+0x30/0xd0
[ 9425.915380]  el0t_64_sync_handler+0x13c/0x158
[ 9425.915384]  el0t_64_sync+0x190/0x198
[ 9425.915392] INFO: task pool-python:36297 blocked for more than 241 seconds.
[ 9425.915395]       Tainted: G         C         6.12.30-v8-16k+ #1879
[ 9425.915397] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 9425.915398] task:pool-python     state:D stack:0     pid:36297 tgid:36235 ppid:23020  flags:0x00000004
[ 9425.915403] Call trace:
[ 9425.915405]  __switch_to+0xf0/0x160
[ 9425.915410]  __schedule+0x32c/0xb60
[ 9425.915415]  schedule+0x3c/0x148
[ 9425.915420]  schedule_preempt_disabled+0x2c/0x50
[ 9425.915425]  rwsem_down_read_slowpath+0x1e0/0x510
[ 9425.915428]  down_read+0xb0/0xc0
[ 9425.915431]  do_madvise.part.0+0x190/0xad8
[ 9425.915434]  __arm64_sys_madvise+0x54/0x78
[ 9425.915438]  invoke_syscall+0x50/0x120
[ 9425.915442]  el0_svc_common.constprop.0+0x48/0xf8
[ 9425.915447]  do_el0_svc+0x28/0x40
[ 9425.915451]  el0_svc+0x30/0xd0
[ 9425.915455]  el0t_64_sync_handler+0x13c/0x158
[ 9425.915459]  el0t_64_sync+0x190/0x198
[ 9526.980424] hailo: get_user_pages failed with -4
[ 9526.980434] hailo 0001:03:00.0: failed to set sg list for user buffer -4
[ 9526.980438] hailo 0001:03:00.0: failed map buffer 7fff5015c000

== /etc/modprobe.d/hailo_pci.conf ==
options hailo_pci force_desc_page_size=4096
2

Hi @Kletternaut,
If the hailo examples run without any issue, it means that the library and driver are installed correctly. There is probably a problem in the application itself, maybe something have changed in the timing and then you experience that hang.
Can you share the output of hailort.log? the output of hailortcli parse-hef <your-hef>

3

Hi Nadav,

thank you for your quick reply!

Here is the content of my hailort.log from the last run:

[2025-06-04 13:05:41.361] [36235] [HailoRT] [info] [vdevice.cpp:523] [create] Creating vdevice with params: device_count: 1, scheduling_algorithm: ROUND_ROBIN, multi_process_service: false
[2025-06-04 13:05:41.362] [36235] [HailoRT] [info] [device.cpp:49] [Device] OS Version: Linux 6.12.30-v8-16k+ #1879 SMP PREEMPT Fri May 23 13:30:44 BST 2025 aarch64
[2025-06-04 13:05:41.364] [36235] [HailoRT] [info] [control.cpp:108] [control__parse_identify_results] firmware_version is: 4.20.0
[2025-06-04 13:05:41.365] [36235] [HailoRT] [info] [vdevice.cpp:651] [create] VDevice Infos: 0001:03:00.0
[2025-06-04 13:05:41.517] [36235] [HailoRT] [info] [hef.cpp:1929] [get_network_group_and_network_name] No name was given. Addressing all networks of default network_group: yolov8s_pose
[2025-06-04 13:05:41.517] [36235] [HailoRT] [info] [hef.cpp:1929] [get_network_group_and_network_name] No name was given. Addressing all networks of default network_group: yolov8s_pose
[2025-06-04 13:05:41.581] [36235] [HailoRT] [info] [internal_buffer_manager.cpp:204] [print_execution_results] Planned internal buffer memory: CMA memory 0, user memory 6639104. memory to edge layer usage factor is 0.93093544
[2025-06-04 13:05:41.581] [36235] [HailoRT] [info] [internal_buffer_manager.cpp:212] [print_execution_results] Default Internal buffer planner executed successfully
[2025-06-04 13:05:41.620] [36235] [HailoRT] [info] [device_internal.cpp:57] [configure] Configuring HEF took 53.496206 milliseconds
[2025-06-04 13:05:41.620] [36235] [HailoRT] [info] [vdevice.cpp:749] [configure] Configuring HEF on VDevice took 54.463686 milliseconds
[2025-06-04 13:05:41.620] [36235] [HailoRT] [info] [infer_model.cpp:436] [configure] Configuring network group 'yolov8s_pose' with params: batch size: 2, power mode: PERFORMANCE, latency: NONE
[2025-06-04 13:05:41.620] [36235] [HailoRT] [info] [multi_io_elements.cpp:756] [create] Created (AsyncHwEl)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [queue_elements.cpp:450] [create] Created (EntryPushQEl0yolov8s_pose/input_layer1 | timeout: 10s)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [filter_elements.cpp:101] [create] Created (PreInferEl3yolov8s_pose/input_layer1 | Reorder - src_order: RGB4, src_shape: (640, 640, 3), dst_order: NHWC, dst_shape: (640, 640, 3))
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [queue_elements.cpp:450] [create] Created (PushQEl3yolov8s_pose/input_layer1 | timeout: 10s)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [edge_elements.cpp:187] [create] Created (LastAsyncEl3AsyncHwEl)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [queue_elements.cpp:450] [create] Created (PushQEl4AsyncHwEl | timeout: 10s)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [filter_elements.cpp:375] [create] Created (PostInferEl4AsyncHwEl | Reorder - src_order: FCR, src_shape: (20, 20, 56), dst_order: FCR, dst_shape: (20, 20, 51))
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [edge_elements.cpp:187] [create] Created (LastAsyncEl0PostInferEl4AsyncHwEl)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [edge_elements.cpp:187] [create] Created (LastAsyncEl5AsyncHwEl)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [edge_elements.cpp:187] [create] Created (LastAsyncEl0AsyncHwEl)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [edge_elements.cpp:187] [create] Created (LastAsyncEl1AsyncHwEl)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [edge_elements.cpp:187] [create] Created (LastAsyncEl2AsyncHwEl)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [queue_elements.cpp:450] [create] Created (PushQEl7AsyncHwEl | timeout: 10s)
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [filter_elements.cpp:375] [create] Created (PostInferEl7AsyncHwEl | Reorder - src_order: FCR, src_shape: (40, 40, 56), dst_order: FCR, dst_shape: (40, 40, 51))
[2025-06-04 13:05:41.621] [36235] [HailoRT] [info] [edge_elements.cpp:187] [create] Created (LastAsyncEl0PostInferEl7AsyncHwEl)
[2025-06-04 13:05:41.622] [36235] [HailoRT] [info] [edge_elements.cpp:187] [create] Created (LastAsyncEl8AsyncHwEl)
[2025-06-04 13:05:41.622] [36235] [HailoRT] [info] [queue_elements.cpp:450] [create] Created (PushQEl6AsyncHwEl | timeout: 10s)
[2025-06-04 13:05:41.622] [36235] [HailoRT] [info] [filter_elements.cpp:375] [create] Created (PostInferEl6AsyncHwEl | Reorder - src_order: FCR, src_shape: (80, 80, 56), dst_order: FCR, dst_shape: (80, 80, 51))
[2025-06-04 13:05:41.622] [36235] [HailoRT] [info] [edge_elements.cpp:187] [create] Created (LastAsyncEl0PostInferEl6AsyncHwEl)
[2025-06-04 13:05:41.622] [36235] [HailoRT] [info] [pipeline.cpp:891] [print_deep_description] EntryPushQEl0yolov8s_pose/input_layer1 | inputs: user | outputs: PreInferEl3yolov8s_pose/input_layer1(running in thread_id: 36279)
[...]
[2025-06-04 13:05:42.416] [36269] [HailoRT] [info] [hef.cpp:1929] [get_network_group_and_network_name] No name was given. Addressing all networks of default network_group: yolov8s_pose

And here is the output of
hailortcli parse-hef ./hailomodel/yolov8s_pose_h8l_pi.hef :

Architecture HEF was compiled for: HAILO8L
Network group name: yolov8s_pose, Multi Context - Number of contexts: 4
    Network name: yolov8s_pose/yolov8s_pose
        VStream infos:
            Input  yolov8s_pose/input_layer1 UINT8, NHWC(640x640x3)
            Output yolov8s_pose/conv70 UINT8, FCR(20x20x64)
            Output yolov8s_pose/conv71 UINT8, NHWC(20x20x1)
            Output yolov8s_pose/conv72 UINT8, FCR(20x20x51)
            Output yolov8s_pose/conv57 UINT8, FCR(40x40x64)
            Output yolov8s_pose/conv58 UINT8, NHWC(40x40x1)
            Output yolov8s_pose/conv59 UINT8, FCR(40x40x51)
            Output yolov8s_pose/conv43 UINT8, FCR(80x80x64)
            Output yolov8s_pose/conv44 UINT8, FCR(80x80x1)
            Output yolov8s_pose/conv45 UINT8, FCR(80x80x51)

If you need any more logs or details, please let me know!

4

Hi,
Between the hailort.log and the demsg output, it seems that somehow the driver was not able to get the right buffer allocation. The error “hailo: get_user_pages failed with -4” from dmesg, happens when the get_user_pages_compact() function fails during VDMA buffer mapping operations. The error code -4 corresponds to -EINTR , indicating the operation was interrupted.
I guess that maybe it was just “luck”, and your network requires much more buffers.

What’s next? If using this kernel is a must, this requires some debugging into the the buffer allocation. The get_user_pages_compact() function have changed quite a few times over the past few kernel versions. Otherwise, if you can stick to the older kernel that would be ab easier solution.

5

Downgrading kernel to 6.12.20 helps.

6

No, it does not help.
https://forums.raspberrypi.com/viewtopic.php?p=2307663&hilit=downgrading+kernel#p2307446

7

Hey @Kletternaut ,

Please check out the solution’s in here:

8

Hi Omria,

thank you for your reply and for linking to the forum post.

Just to clarify:
Did you intend to link to the user’s (Ron_Newby) post about changing the GStreamer caps string as a solution for our issue, or was this a mistake?

I’m asking because in your own reply in the thread, you actually recommend a kernel downgrade, while the linked user post describes a change that makes no sense to me.
Moreover, the line mentioned in that post (f'video/x-raw, pixel-aspect-ratio=1/1, format={{video_format}}, width={{video_width}}, height={{video_height}}') does not even exist in the current Hailo repository for example, in pose_estimation.py.

Could you please confirm whether you meant to reference the user’s workaround, or if you intended to point us to your own suggestion regarding the kernel version?

Thank you and best regards,
Tom

10

I downgraded the kernel using the following command:

sudo rpi-update 8bd0d75837d6a99138c7cbbc24888601b220405a

Now I am running:

Linux raspi5 6.6.77-v8-16k+ #1851 SMP PREEMPT Thu Feb 13 13:02:57 GMT 2025 aarch64 GNU/Linux

With this kernel version, the script is running stable again.

1 Like
11

Just for reference, if anyone else encounters the same Hailo PCIe driver issue on Raspberry Pi 5 and needs to downgrade the kernel:

You can use rpi-update with a specific commit hash to install an older kernel version.
Here are some example hashes and their corresponding kernel versions:

192d8e0b9d  kernel: Bump to 6.6.78
8bd0d75837  kernel: Bump to 6.6.77
d4b5ad47f7  kernel: Bump to 6.6.76
146f82c885  kernel: Bump to 6.6.75

f810e0a27a  kernel: Bump to 6.12.32
a67b81f4f6  kernel: Bump to 6.12.31
7c8549924c  kernel: Bump to 6.12.30
9c88f7fe39  kernel: Bump to 6.12.29
6931ce24d5  kernel: Bump to 6.12.28
f54e67fef6  kernel: Bump to 6.12.27
c7c5c236b8  kernel: Bump to 6.12.25
0a0b3671d5  kernel: Bump to 6.12.22
b07b1331c2  kernel: Bump to 6.12.21
69e780abc9  kernel: Bump to 6.12.20
80a76d2185  kernel: Bump to 6.12.19
3608b77cd4  kernel: Bump to 6.12.18
9267e6101b  kernel: Bump to 6.12.17
dab3d92503  kernel: Bump to 6.12.16

To downgrade to the latest 6.6.x Kernel, use for example:

sudo rpi-update 192d8e0b9d

Afterwards, reboot:

sudo reboot

Check your kernel version with:

uname -a

Note:

  • The hashes are commit IDs from the rpi-firmware GitHub repository.
  • This method is useful if you need a specific kernel version that works with your Hailo setup and apt does not provide it.
  • Downgrading the kernel is only a workaround, not a permanent solution. Ideally, Hailo and kernel compatibility should be addressed in future updates.

Hope this helps someone!

12

Hey @Kletternaut ,

The issue i linked has the same root of the problem in the kernel and its solution is the same as you just mentioned !

Best Regards

13

@omria

How do I make Hailo work on kernel 6.12.25? I need this kernel specifically and cannot downgrade to 6.12.20 due to other kernel bugs in that version