In the 5W mode issue 1 also happened but only it takes longer. Issues 2 and 3 did not occur anymore but the Jetson became also slower because of less processing speed.
It looked like it was a thermal problem. I ran the tegrastats and below shows the last line for 5W and 10W without a fan and then it powered off:
For the 5W:
RAM 3160/3965MB (lfb 107x4MB) SWAP 42/4096MB (cached 3MB) CPU [98%@921,98%@921,off,off] EMC_FREQ 0% GR3D_FREQ 9% PLL@49.5C CPU@53C PMIC@100C GPU@51C AO@62.5C thermal@53C POM_5V_IN 2728/4064 POM_5V_GPU 120/1157 POM_5V_CPU 882/853
For the 10W:
RAM 3093/3965MB (lfb 107x4MB) SWAP 57/4096MB (cached 9MB) CPU [37%@825,21%@825,21%@825,21%@825] EMC_FREQ 0% GR3D_FREQ 98% PLL@34C CPU@37C PMIC@100C GPU@37C AO@48.5C email@example.comC POM_5V_IN 6583/6170 POM_5V_GPU 3429/3015 POM_5V_CPU 709/814
So I bought the recommended fan Noctua NF-A4x20 5V PWM and then running in 10W and even jetson_clocks gave no problems anymore.
With fan the Jetson Nano kept running and AO didn’t reach high temperatures. Maybe there is a dT/dt protection in the Jetson Nano because the 5W raises the remperatures slowly and resches higher temperatures than in 10W mode? I didn’t read it in the thermal design guide.
With a fan 5W the max AO temperature measured was 42C and for 10W and jetson_clocks 50C.
Looks like a fan is obligatory for deep learning applications and I think it should have been added to the NANO-DLI-KIT.
Another issue I didn’t mention but does not occur everytime so it is hard to put a finger on it, is that when powering the Jetson Nano on, it sometimes turns off immediately. Then powering on again the Jetson Nano remains on. I used the Mean Well 5V 4A adapter included in the NANO-DLI-KIT. My guess explanation is that when the Jetson is fully discharged there is a surge current because of the capacitance of capacitors and USB leads and wires that is higher than 5A and this lowers the voltage. Because the capacitors are charged the second time the surge current is lower. It is a wild guess and I don’t have equipment to measure it. As said it does not always happen but I bought a Mean Well 5V 6A adapter as a backup adapter to test this. It hasn’t happened yet with this adapter.