Hi NVIDIA team,
The previously post is locked, but issue is still not resolved. Post again.
We have our carrier board + AGX Orin 64GB + JP6.2.
We check the boot log each time after power on:
dmesg | grep -i error
And found this error message if we connected our carrier board to a link partner with an Ethernet cable, then power on.
tegra-mc 2c00000.memory-controller: unknown: write @0x0000000020cf2000: EMEM address decode error (EMEM decode error)
This issue only duplicated on ethernet@2310000, ethernet@6800000 is fine.
The Ethernet function is fine, even it has the error messages.
Does this error message have any impact? Should we be worried about this error?
This line did not appear if we didn’t connected our carrier board to a link partner, then power on.
It means, there’s no issue if I disconnect a “link partner”.
Here is our dmesg log
dmesg.txt (60.9 KB)
*** Please note that this reply is generated by LLM automatically ***
The issue you’re experiencing with the Jetson AGX Orin 64GB JP62 carrier board, specifically the error message related to the Ethernet connection, is likely related to the PCIe link configuration and the interaction with the link partner.
The error message you’re seeing is likely due to the PCIe link not being properly established or negotiated between the Jetson AGX Orin and the link partner. This can be caused by various factors, including:
- PCIe link speed and width mismatch: The Jetson AGX Orin may be configured to use a different PCIe link speed or width than the link partner, causing the link to not be properly established.
- PCIe ASPM (Active State Power Management) issues: ASPM is a power management feature that can cause issues with PCIe link establishment if not properly configured.
- PHY (Physical Layer) issues: The PHY layer is responsible for establishing the physical connection between the Jetson AGX Orin and the link partner. Issues with the PHY layer can cause the PCIe link to not be properly established.
To resolve this issue, you can try the following:
- Check the PCIe link configuration: Verify that the PCIe link speed and width are properly configured on both the Jetson AGX Orin and the link partner.
- Enable PCIe ASPM: Enable ASPM on the Jetson AGX Orin to allow it to properly manage power states and establish the PCIe link.
- Check the PHY layer: Verify that the PHY layer is properly configured and functioning correctly.
It’s worth noting that the error message you’re seeing may not have a significant impact on the functionality of the Ethernet connection, as you’ve mentioned that the Ethernet function is working fine despite the error message. However, it’s still important to investigate and resolve the issue to ensure that the system is functioning properly and efficiently.
In comparison to other similar issues, the error message you’re seeing is similar to the one mentioned in the post “PEX_WAKE_N pin cannot wake up” on the Jetson AGX Orin PCIe forum. However, the root cause of the issue may be different, and it’s essential to investigate and resolve the issue specific to your setup.
Additionally, you can refer to the NVIDIA documentation on PCIe configuration and troubleshooting for more information on resolving PCIe-related issues.
In terms of the impact of this error message, it’s essential to monitor the system’s behavior and performance to determine if the error message is causing any issues. If the system is functioning properly, and the error message is not causing any noticeable issues, it may not be necessary to take immediate action. However, it’s still important to investigate and resolve the issue to ensure that the system is functioning properly and efficiently in the long term.
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If it only shows up once and the ethernet function is fine, then no need to care about that error.