Instability - Power limitation?

pial

Hello

I'm using a passive UP board with a Realsense D435 (on the usb3 port), an external HDD (seagate backup plus 2TB - on a usb2 port), and a microphone array (ReSpeaker 7 Mic Array - on a usb 2 port).
The system is based on Ubuntu and records the 3D stream of camera and the audio of the microphone.
A previous setup built using an UP board with a fan, a Realsense ZR300 and a Toshiba Canvio Basics 1TB with the same microphone has been used extensively without any problem.

My problem is that the new system is unstable: hanging/freezing, "Frame didn't arrived within 5000" error after a few minutes recording the camera, ethernet connection switching on/off.
I don't know what is going wrong, and I would need ideas:

• Could it be a power draw problem, and how could I diagnose this?
• Is the D435 more power hungry than the ZR300?
• Since the switch from librealsense to librealsense2, the CPU load is very high during recording. Could this be linked to this?
• Could the board itself be faulty? Could the problem with the ethernet port be indicative of power supply issues too? The syslog also contains many "Audio Port: ASoc: no backend DAIs enabled for Audio Port" messages (cf.
• Could there be a temperature problem (core temps are at ~52°C during recording)

Many thanks for any help.
Pierre

Jesse Kaukonen

We had to move to a 5V / 6A PSU as we had crashes with 5V / 4A with USB + GPU use. USB devices have a set amount of power they can draw. I never measured the DS4X5 series current draw, but they can be several hundred milliamperes. We use these PSUs: https://www.mouser.fi/ProductDetail/AAEON-UP/EP-PS5V6A65WUPS?qs=sGAEpiMZZMve4/bfQkoj+Po0V0IgBFDNrLMM9H84DIc=

The RealSense bug is "fixed" by compiling the library without OpenMP, but this causes RGB and depth images to be out of sync (quite a lot on the Upboard).

I asked AAEON about the temperature sensor accuracy (of the CPU) and their reply was that the "lm sensors" output is not reliable.

pial

Thank you for the answers and precisions. I'll get a better PSU.

So far, the high CPU usage is not a huge problem but I need the stream to be properly synced. The rest of the software running on it is well optimised (ffmpeg and own). I certainly hope it will be fixed though.