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Hello,
Thank you for reaching out with your question about the USB messages during boot on your custom carrier board with the iMX 8M Plus SOM module. It sounds like you’re encountering a common issue related to USB power management or hub configuration. Here are some steps you can take to address this:
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USB Hub Compatibility: Verify that the USB5744T-I/2G hub is fully compatible with the iMX 8M Plus SOM. Ensure that the hub’s firmware and configuration are up-to-date and compatible with your Linux kernel version.
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Power Management Settings: The message about “disabling LPM” (Link Power Management) suggests that the system might not support certain power management features. You could try disabling USB power management in the kernel configuration or through boot parameters to see if this resolves the issue.
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Kernel Logs and Debugging: Review the kernel logs (
dmesg) for any additional error messages or warnings related to USB. This can provide more context on the issue. -
USB Hub Port Control: Consider using tools like
uhubctlto manually control the power to the USB hub ports. This can help determine if the issue is related to power cycling or port control. -
Driver and Firmware Updates: Make sure all relevant drivers and firmware for the USB hub and UART IC are up-to-date. Updates can often resolve compatibility issues.
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Hardware Connections: Double-check all hardware connections to ensure there are no loose connections or faulty cables that might cause intermittent USB disconnections.
By following these steps, you should be able to narrow down the cause of the repeated USB messages and find a suitable solution. I hope this helps, and please feel free to reach out if you have further questions.
Best regards,
Toradex AI Assistant
Please, also check if these links can help you solve your problem:
Dahlia Board with Verdin iMX8M-Plus: USB-C power role change.