Camera streams do not restart after Offline Update on OrangePi5

[crschardt]

Describe the bug After doing an offline update for photonvision, the system restarts, but camera streams fail to load. The log shows repeating errors like CS: ERROR: ioctl VIDIOC_S_FMT failed at UsbCameraImpl.cpp:976: Device or resource busy (UsbUtil.cpp:156). Neither hard refreshing the browser window nor restarting the photonvision service fix the problem. The only way to recover is by restarting the entire device.

Platform:

• Hardware Platform (ex. Raspberry Pi 4, Windows x64): OrangePi5
• Network Configuration (Connection between the Radio and any devices in between, such as a Network Switch): Home Network Switch
• PhotonVision Version: photonvision-dev-v2024.2.0-8-g57f02f31-linuxarm64_orangepi5.img
• Browser (with Version) (Chrome, Edge, Firefox, etc.): Edge
• Camera(s) Used: 2x Arducam OV9281s

Additional context ~During debugging, I installed v4l-utils and the problem went away. I removed v4l-utils and it came back. I think we should add v4l-utils to the install script for Ubuntu installs.~ <- this was a red herring.

[mcm001]

Why installing v4l-utils fixes things is beyond befuddling to me. Would be good to get someone else to reproduce or find the root cause, but it's easy to install for us yeah

[crschardt]

I'm starting to question that conclusion. I'm doing more testing.

Is it possible that there the streams sometimes don't get released properly when photonvision shuts down?

[mcm001]

I think possible. Perhaps a longer shutdown delay in systemd is needed?

[crschardt]

It's turning out to be very intermittent. I can sometimes get it to happen a couple times in a row, but then I'm not able to reproduce it. I'll keep monitoring it to see if I can find some consistent way to reproduce.