RPI Zero WH - CPU load very high

[diabolyk]

Hi all,

I'm facing a CPU load very high (near or reaching 100%) all the time.
Main issue is no more light on leds...
The only way to solve is to "disable instance" and after "enable instance", but it works for few minutes before falling down.

Is there a way to optimize my RPI Zero ?
Cause using it only for HyperHDR, perhaps some features should be disabled in order to obtain better stability ?

I use it since a long time (right now on V19) but since today I have this issue.

Thanks for helping me ;)

[awawa-dev]

Hi
RPI Zero has only one core so don't expect miracles and use lowest possible settings for video including reduce framerate/quarter of frame mode to improve a situation a bit: https://www.hyperhdr.eu/2021/10/hands-on-with-new-raspberry-pi-zero-2-w.html

[diabolyk]

problem seems on another thing thant CPU, sorry

Here my log when falling down :
`2025-06-02T17:41:35.212Z [V4L2:AUTO] Frame too small: 0 != 614400'

'2025-06-02T17:41:35.224Z [V4L2:AUTO] Throws error nr: VIDIOC_QBUF error. Video stream is probably broken. error code 19, No such device'

'2025-06-02T17:41:35.227Z [V4L2:AUTO] Frame too small: 0 != 614400'

'2025-06-02T17:41:35.230Z [V4L2:AUTO] Throws error nr: VIDIOC_QBUF error. Video stream is probably broken. error code 19, No such device'

'2025-06-02T17:41:35.230Z [V4L2:AUTO] Frame too small: 0 != 614400'

'2025-06-02T17:41:35.231Z [V4L2:AUTO] Throws error nr: VIDIOC_QBUF error. Video stream is probably broken. error code 19, No such device'

'2025-06-02T17:41:35.232Z [V4L2:AUTO] Frame too small: 0 != 614400'

'2025-06-02T17:41:35.233Z [V4L2:AUTO] Throws error nr: VIDIOC_QBUF error. Video stream is probably broken. error code 19, No such device'

'2025-06-02T17:41:35.351Z [V4L2:AUTO] Throws error nr: VIDIOC_DQBUF error. Video stream is probably broken. Refreshing list of the devices. error code 19, No such device'

'2025-06-02T17:41:35.363Z [V4L2:AUTO] VIDIOC_STREAMOFF error code 19, No such device`

[diabolyk]

problem solved by powering the grabber with a separate line rather than by TV USB