Hello,
I’m experiencing a critical issue with the RM502Q-AE modem where it constantly
disconnects and reconnects over USB, causing all serial ports (ttyUSB0-3) and
the network interface to become unavailable periodically.
SYSTEM INFORMATION:
- Device: Quectel RM502Q-AE
- Host: NVIDIA Jetson Orin NX
- OS: Linux (Jetson-specific build)
- Kernel: 5.15.148-tegra
- Firmware Version: RM502QAEAAR11A04M4G_01.202.01.202
- SIM: AT&t BUSINESS SIM CARD
PROBLEM:
The modem disconnects and reconnects over USB (period of a few seconds),
causing:
- All serial ports (ttyUSB0-3) to disconnect/reconnect
- Network interface (enx…) to unregister/reregister
- USB transfer errors in kernel logs
- “Enable of device-initiated U1/U2 failed” errors. I attached a log of the dmesg.
bootupDmesgwithModem5G.txt (73.4 KB)