Raspberry Pi Zero loses connection to USB grabber after reboot – LEDs remain dark

Hello everyone,

I have a problem with my LEDs and the Raspberry Pi Zero that I would like to discuss here. It's about the connection between the Raspberry Pi Zero and my USB grabber.

The problem occurs every time I restart the Raspberry Pi Zero. The connection to the USB grabber seems to be lost. The USB grabber is displayed in the Hyperion web interface, but the LEDs remain dark. The only thing that helps is to deactivate the grabber via the web interface and then activate it again. Only then will the LEDs work again, until the next restart of the Raspberry Pi.

Here are some details about my configuration:

Raspberry Pi Zero with Raspbian OS

USB grabber (manufacturer and model on request)

Hyperion version (on request)

LED setup (number and type of LEDs on request)

Have any of you had a similar problem before or have an idea how I could fix it? Is there a way to automatically reinitialize or activate the USB grabber when starting the Raspberry Pi Zero so that I don't have to do this manual readjustment every time?

Thank you in advance for your help!

I have the same problem, but only when the RPI is unplugged and restarted. Unfortunately, I haven't found a solution yet.

2025-10-22T14:40:12.346Z [V4L2] (INFO) Started
2025-10-22T14:40:12.431Z [LEDDEVICE|First LED Hardware instance] (INFO) Switching device ws281x ON
2025-10-22T14:40:12.432Z [LEDDEVICE|First LED Hardware instance] (INFO) Device ws281x is ON
2025-10-22T14:57:53.599Z [V4L2] (ERROR) Throws error nr: VIDIOC_QBUF error code 19, No such device
2025-10-22T14:57:53.828Z [V4L2] (ERROR) Previous line repeats 3 times
2025-10-22T14:57:53.828Z [V4L2] (ERROR) Throws error nr: VIDIOC_DQBUF error code 19, No such device
2025-10-22T14:57:53.828Z [V4L2] (ERROR) VIDIOC_STREAMOFF  error code  19, No such device
2025-10-22T14:57:53.830Z [V4L2] (INFO) Stopped
2025-10-22T14:57:54.631Z [LEDDEVICE|First LED Hardware instance] (INFO) Switching device ws281x OFF
2025-10-22T14:57:54.640Z [LEDDEVICE|First LED Hardware instance] (INFO) Device ws281x is OFF

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Could it be that my HDMI switch isn't getting enough power? I get power from the TV's USB port. Everything worked fine six months ago.