RM520N-GLAA disappears after reboot

Technical Subjects Hardware Baseband
1

Hi, after several RM520N-GLAP I obtained a new RM520N-GLAA which seems to work fine in USB Mode but in PCIe EP mode installed in a Key B M.2 NVME Adapter it only gets recognized in the device manager of Windows 11 after a pysical power cut.

While it otherwise worked fine it disappears after a laptop reboot and can only be made visible again by a battery cut of or physical uninstallation which is unacceptable and really annoying.

I don’t have this problem with all GLAP versions I have but only with the GLAA switched into PCIe EP mode.

Any idea?

2

Dear @AirMax
Actually, AP and AA has different timing when power on.

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image1083×688 42.1 KB

3

Ok understood, I assumed this already. But: How can I solve the problem and why is that? Whats the benefit of the later timing for GLAA vs GLAP ?
How can I resolve this on Windows 11 ?

4

Dear @AirMax
It is a hardware problem, other guy will help you.

Hi @fuguiwang-Q
Please help to check this.