Official moOde 8 support thread

[TheOldPresbyope]

Tried 8.1.1 (64) fresh install on Rasptouch with ES9038Q2M DAC on Raspi 3b+.

Getting message undervolting detected and had to stop there.
Never had such a problem with 8.0.

Too bad, would have loved to go to next level.

All the Best

Maartin

What kind of power supply are you using?  I'm not sure it would have much effect, but have you also tried the 32 bit 8.1.1 image?

Same Power Supply as before with 8.0, 3A. Tried another PS with 5A, same problem.

Did not try the 32bit yet, but will do and report.

AtB
m.

The official power requirements are listed here:
https://www.raspberrypi.com/documentatio...wer-supply
2.5A should be plenty, but that's amps, not volts, your message suggests it is too few volts is the problem, the recommendation if for 5.1V

 
Thanks Bertrum,
the power handling works with/through the "AUDIOPHONICS PI-SPC REG Power Management" module. There is some problem i guess. As the undervolting have not been there with moode8.0 i think it is worse to mention it here.

AtB
m.

From the Raspberry Pi Documentation site

Power Supply Warnings
On all models of Raspberry Pi since the Raspberry Pi B+ (2014) except the Zero range, there is low-voltage detection circuitry that will detect if the supply voltage drops below 4.63V (+/- 5%). This will result in a warning icon being displayed on all attached displays and an entry being added to the kernel log.

If you are seeing warnings, you should improve the power supply and/or cable, as low power can cause problems with corruption of SD cards, or erratic behaviour of the Raspberry Pi itself; for example, unexplained crashes.

Voltages can drop for a variety of reasons, for example if the power supply itself is inadequate, the power supply cable is made of too thin wires, or you have plugged in high demand USB devices.

I know nothing about the Audiophonics power management module but you can add it to the list of usual suspects in that last sentence. It's easy for me to invent scenarios but impossible for me to diagnose remotely.

The undervolt warnings are being generated by code in the underlying Raspberry Pi OS, not by any code in moOde. There have been bumps to both the OS and to the kernel between the two moOde releases you mention.

Regards,
Kent