Why doesn't tegrastats output the VDDQ_VDD2_1V8AO metric?

Robotics & Edge Computing Jetson Systems Jetson AGX Orin
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1

I’m running some experiments and want to monitor the DDR power consumption. I’ve seen that some people can get the VDDQ_VDD2_1V8AO metric using the tegrastats command, but this metric doesn’t show up in my tegrastats output.

my env：

AGX orin 32GB

Jetpack 6.2.1

my tegrastats output:

12-26-2025 15:57:05 RAM 9297/30697MB (lfb 172x4MB) SWAP 11/15349MB (cached 0MB) CPU [2%@115,0%@115,2%@115,0%@115,0%@729,0%@729,1%@729,0%@729] EMC_FREQ 0%@2133 GR3D_FREQ 0%@[0,0] NVENC off NVDEC off NVJPG off NVJPG1 off VIC off OFA off NVDLA0 off NVDLA1 off PVA0_FREQ off APE 174 cpu@49.031C soc2@47.437C soc0@46.312C tj@49.031C soc1@48.062C VDD_GPU_SOC 2297mW/2297mW VDD_CPU_CV 382mW/382mW VIN_SYS_5V0 3741mW/3741mW
4

Hi,
We don’t see VDDQ_VDD2_1V8AO in tegrastats on AGX Orin developer kit:

12-30-2025 05:27:58 RAM 6814/30697MB (lfb 8x4MB) CPU [0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201] EMC_FREQ 0%@3199 GR3D_FREQ 0%@[1300,1300] NVENC off NVDEC off NVJPG off NVJPG1 off VIC off OFA off NVDLA0 off NVDLA1 off PVA0_FREQ off APE 174 cpu@59.406C soc2@54.218C soc0@55.843C gpu@52.5C tj@59.406C soc1@55.375C VDD_GPU_SOC 4973mW/4973mW VDD_CPU_CV 1530mW/1530mW VIN_SYS_5V0 4428mW/4428mW
12-30-2025 05:27:59 RAM 6814/30697MB (lfb 8x4MB) CPU [0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201] EMC_FREQ 0%@3199 GR3D_FREQ 0%@[1300,1300] NVENC off NVDEC off NVJPG off NVJPG1 off VIC off OFA off NVDLA0 off NVDLA1 off PVA0_FREQ off APE 174 cpu@59.156C soc2@54.031C soc0@56.062C gpu@52.531C tj@59.156C soc1@55.593C VDD_GPU_SOC 4973mW/4973mW VDD_CPU_CV 1530mW/1530mW VIN_SYS_5V0 4428mW/4428mW
12-30-2025 05:28:00 RAM 6814/30697MB (lfb 8x4MB) CPU [0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,0%@2201,2%@2201,0%@2201,0%@2201,0%@2201,0%@2201] EMC_FREQ 0%@3199 GR3D_FREQ 0%@[1300,1300] NVENC off NVDEC off NVJPG off NVJPG1 off VIC off OFA off NVDLA0 off NVDLA1 off PVA0_FREQ off APE 174 cpu@58.937C soc2@54.187C soc0@55.875C gpu@53.125C tj@59C soc1@55.437C VDD_GPU_SOC 4973mW/4973mW VDD_CPU_CV 1530mW/1530mW VIN_SYS_5V0 4428mW/4428mW

You may refer to developer guide and get the status from device nodes:
Jetson Orin Nano Series, Jetson Orin NX Series and Jetson AGX Orin Series — NVIDIA Jetson Linux Developer Guide