# Troubleshoot the USB interface

Resolve common USB configuration and compliance issues on the Snapdragon
X2 platform.

Use the following compliance update procedure and answers to frequently
asked questions to keep the USB ports within specification. USB
compliance and configuration issues usually trace back to PHY tuning
parameters or a missing device tree change. Use the compliance update
procedure to tune the PHY for your platform, and use the frequently
asked questions to resolve common configuration questions.

- [Update the USB PHY tuning parameters for compliance](https://docs.qualcomm.com/doc/80-A0399-8/topic/update-usb-phy-tuning-parameters.html)
Update the PHY tuning parameters in UEFI to meet platform compliance
requirements.
- [Resolve common USB configuration questions](https://docs.qualcomm.com/doc/80-A0399-8/topic/resolve-common-usb-configuration-questions.html)
The following FAQ addresses common USB configuration scenarios.

Last Published: Sep 17, 2026

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