ERROR: Device timeout detected, attempting a restart

[karth1203]

bug-reports.txt

The Raspberry Pi AI Camera using the IMX500 repeatedly stops streaming when an AI model is loaded.

The normal camera stream works, but when running an official IMX500 post-processing configuration such as MobileNet SSD or PoseNet, the network firmware uploads successfully and the camera later reports:

/dev/video4: Dequeue timer of 1000000.00us has expired!
Camera frontend has timed out!

!!!

The issue reproduces using the official rpicam-hello application without any custom Python application running.

It has been reproduced on two Raspberry Pi 5 systems with two IMX500 AI Camera modules.

Steps to reproduce

Stop any custom camera services:

sudo systemctl stop imx500_timeout_watchdog.service
sudo systemctl stop imx500.service

Run the official PoseNet pipeline:

rpicam-hello
-n
-t 600000
--post-process-file /usr/share/rpi-camera-assets/imx500_posenet.json
--viewfinder-width 1280
--viewfinder-height 720
--framerate 20

The PoseNet network firmware uploads successfully, but /dev/video4 eventually stops delivering frames and the camera frontend times out.

The same issue also occurs with:

rpicam-hello
-n
-t 600000
--post-process-file /usr/share/rpi-camera-assets/imx500_mobilenet_ssd.json
--viewfinder-width 1280
--viewfinder-height 720
--framerate 20

A normal camera test without an IMX500 AI model does not show the same timeout:

rpicam-hello
-n
-t 600000
--viewfinder-width 1280
--viewfinder-height 720
--framerate 20
Expected behaviour

The IMX500 camera should continue streaming for the full requested duration while running the official PoseNet or MobileNet SSD model.

Actual behaviour

The network firmware reaches 100%, the stream starts, and then the CFE stops receiving frames from /dev/video4. Restart attempts continue to produce the same timeout.

Bug report

The attached bug report was generated using:

sudo camera-bug-report
-t 360
-o /home/smartparkngo/imx500-posenet-bug-report.txt
-c "rpicam-hello -n -t 0 --post-process-file /usr/share/rpi-camera-assets/imx500_posenet.json --viewfinder-width 1280 --viewfinder-height 720 --framerate 20"

The bug-report command and capture date are included in the generated report.

System information
Hardware: Raspberry Pi 5 Model B Rev 1.1
OS: Debian GNU/Linux 12 Bookworm
Kernel: 6.12.96+rpt-rpi-2712
Architecture: aarch64
rpicam-apps: v1.9.0
libcamera: v0.5.2+99-bfd68f78
Boot firmware: 086b83e3, dated 2026-05-26
IMX500 RP2040 firmware: version 15
IMX500 main firmware: 02.03.00

The report confirms the Raspberry Pi model, OS, kernel, rpicam-apps, and libcamera versions.

All packages are fully updated to the latest versions available from the Raspberry Pi Bookworm repository:

rpicam-apps: 1.9.0-1bpo12+1
python3-picamera2: 0.3.31-1
libcamera0.5: 0.5.2+rpt20250903-1bpo12+1
imx500-all: 1.9.0-1bpo12+1
imx500-firmware: 0.FF23+1
imx500-models: 1.9.0-1bpo12+1
Additional context

The following have already been ruled out:

Custom Python detection code
MQTT processing
Snapshot/JPEG processing
systemd watchdog
Multiple processes accessing /dev/video4
MobileNet model specifically
PoseNet model specifically
Low system memory
CMA memory exhaustion

CMA was configured as 64 MB, with approximately 55 MB still free when the report was generated.

The camera is detected correctly and exposes the expected IMX500 modes:

2028x1520 at approximately 30 FPS
4056x3040 at approximately 10 FPS

The failure appears to be specific to the shared IMX500 AI-enabled streaming path rather than the custom application or an individual neural-network [model.](url)

[naushir]

Unfortunately I am unable to reproduce this on my setup. One suggestion - can you make sure your packages are fully up-to-date (I see from above they are behind) and try again?

[karth1203]

can you be specific on which is not uptodate ?

…

On Mon, Aug 3, 2026 at 4:13 AM naushir ***@***.***> wrote: *naushir* left a comment (raspberrypi/rpicam-apps#927) <#927 (comment)> Unfortunately I am unable to reproduce this on my setup. One suggestion - can you make sure your packages are fully up-to-date (I see from above they are behind) and try again? — Reply to this email directly, view it on GitHub <#927?email_source=notifications&email_token=AL3GE5UDBZ2J6XEXANMNIGD5IBCRLA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJWGM4DQNJVHA42M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-5163885589>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AL3GE5UIBFYGA2EDVCWHWDD5IBCRLAVCNFSNUABFKJSXA33TNF2G64TZHMZTCNBVHA4TINRWHNEXG43VMU5TKMBTG42DSNZWHE2KC5QC> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/AL3GE5T32CJQ7E3AQG7RTZL5IBCRLA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJWGM4DQNJVHA42M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/AL3GE5WAGQ6JBHOLIQX6CD35IBCRLA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJWGM4DQNJVHA42M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>

[naushir]

All of them -

sudo apt update
sudo apt full-upgrade -y

Note that if you are running on a live production system, please backup your sdcard in case things don't work the same way after an upgrade cycle.

[karth1203]

i have done that but still same issue sudo apt update sudo apt full-upgrade -y Hit:1 http://deb.debian.org/debian bookworm InRelease Hit:3 http://deb.debian.org/debian-security bookworm-security InRelease Hit:4 http://deb.debian.org/debian bookworm-updates InRelease Get:5 https://pkgs.tailscale.com/stable/raspbian bookworm InRelease Hit:2 https://midokura.github.io/debian bookworm InRelease Hit:6 http://archive.raspberrypi.com/debian bookworm InRelease Fetched 6,652 B in 1s (7,258 B/s) Reading package lists... Done Building dependency tree... Done Reading state information... Done All packages are up to date. Reading package lists... Done Building dependency tree... Done Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. ***@***.***:~ $

…

On Tue, Aug 4, 2026 at 8:54 AM naushir ***@***.***> wrote: *naushir* left a comment (raspberrypi/rpicam-apps#927) <#927 (comment)> All of them - sudo apt update sudo apt full-upgrade -y Note that if you are running on a live production system, please backup your sdcard in case things don't work the same way after an upgrade cycle. — Reply to this email directly, view it on GitHub <#927?email_source=notifications&email_token=AL3GE5T36Y7YOPNPHU2NY735IHMHVA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJXHEZTKNJTGUYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-5179355350>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AL3GE5XVEA6HGULMSZOLS3L5IHMHVAVCNFSNUABFKJSXA33TNF2G64TZHMZTCNBVHA4TINRWHNEXG43VMU5TKMBTG42DSNZWHE2KC5QC> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/AL3GE5QXMAQSBSSHFNXFN535IHMHVA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJXHEZTKNJTGUYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/AL3GE5X5U3PT7VOQQNJRIXD5IHMHVA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJXHEZTKNJTGUYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>

[karth1203]

i have four units and all doing the same ... On Tue, Aug 4, 2026 at 9:09 AM Karthick Ganeshan < ***@***.***> wrote:

…

i have done that but still same issue sudo apt update sudo apt full-upgrade -y Hit:1 http://deb.debian.org/debian bookworm InRelease Hit:3 http://deb.debian.org/debian-security bookworm-security InRelease Hit:4 http://deb.debian.org/debian bookworm-updates InRelease Get:5 https://pkgs.tailscale.com/stable/raspbian bookworm InRelease Hit:2 https://midokura.github.io/debian bookworm InRelease Hit:6 http://archive.raspberrypi.com/debian bookworm InRelease Fetched 6,652 B in 1s (7,258 B/s) Reading package lists... Done Building dependency tree... Done Reading state information... Done All packages are up to date. Reading package lists... Done Building dependency tree... Done Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. ***@***.***:~ $ On Tue, Aug 4, 2026 at 8:54 AM naushir ***@***.***> wrote: > *naushir* left a comment (raspberrypi/rpicam-apps#927) > <#927 (comment)> > > All of them - > > sudo apt update > sudo apt full-upgrade -y > > Note that if you are running on a live production system, please backup > your sdcard in case things don't work the same way after an upgrade cycle. > > — > Reply to this email directly, view it on GitHub > <#927?email_source=notifications&email_token=AL3GE5T36Y7YOPNPHU2NY735IHMHVA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJXHEZTKNJTGUYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-5179355350>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AL3GE5XVEA6HGULMSZOLS3L5IHMHVAVCNFSNUABFKJSXA33TNF2G64TZHMZTCNBVHA4TINRWHNEXG43VMU5TKMBTG42DSNZWHE2KC5QC> > . > Triage notifications, keep track of coding agent tasks and review pull > requests on the go with GitHub Mobile for iOS > <https://github.com/notifications/mobile/ios/AL3GE5QXMAQSBSSHFNXFN535IHMHVA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJXHEZTKNJTGUYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> > and Android > <https://github.com/notifications/mobile/android/AL3GE5X5U3PT7VOQQNJRIXD5IHMHVA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJXHEZTKNJTGUYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. > Download it today! > You are receiving this because you authored the thread.Message ID: > ***@***.***> >

[naushir]

A few more questions to help debug this since I am unable to reproduce:

• Has this only recently started happening, or is this new hardware and has never worked?
• What power supply are you using in your setup?
• Are those 4 units referring to the AI camera, the Pi 5 board, or both?

[karth1203]

hi Naushir - it is new hardware PI5 and AI camera, - Using 5vdc 7A --- and throttle is 0x00 - 4 units Ai and Pi 5 Regards Karthick Ganeshan

…

On Tue, Aug 4, 2026 at 9:24 AM naushir ***@***.***> wrote: *naushir* left a comment (raspberrypi/rpicam-apps#927) <#927 (comment)> A few more questions to help debug this since I am unable to reproduce: - Has this only recently started happening, or is this new hardware and has never worked? - What power supply are you using in your setup? - Are those 4 units referring to the AI camera, the Pi 5 board, or both? — Reply to this email directly, view it on GitHub <#927?email_source=notifications&email_token=AL3GE5WUKTS65LAX3LGJCML5IHPZ3A5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJXHE3DQOBRGIYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-5179688120>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AL3GE5WNJJVBGXRFX44A2E35IHPZ3AVCNFSNUABFKJSXA33TNF2G64TZHMZTCNBVHA4TINRWHNEXG43VMU5TKMBTG42DSNZWHE2KC5QC> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/AL3GE5UI5JFCFDQWC3RHW4L5IHPZ3A5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJXHE3DQOBRGIYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/AL3GE5WYRKX47SBU5YE2ZUT5IHPZ3A5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJXHE3DQOBRGIYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>

[naushir]

Using 5vdc 7A --- and throttle is 0x00

Am I correct in thinking that this is not an official Raspberry Pi supply? If not, I would suggest trying the official supply as the AI camera does have stricter power requirements when running AI models. Also could you clarify what you mean by "throttle is 0x00" here?

Also, I noticed you are running a Bookworm OS image. This is an older image which is now superseded by Trixie OS. Please can you create a new Trixie OS image with Raspberry PI Imager, update the apt packages, and retry your tests?