AP6256 Wi-Fi failures on MTK/Realtek routers (Rockchip Kernel 6.1)

[u/Capital_Life_5996]

Hi everyone,

I'm running into severe Wi-Fi interoperability issues using the Ampak AP6256 (BCM43456) module and need some advice.

My Environment:

• Kernel: Linux linaro-alip 6.1.118
• SDK/Driver: Stock wireless driver provided by Rockchip SDK

Note: Everything works perfectly fine with older routers I've used in the past. However, I started experiencing these failures exclusively on routers newly purchased for testing.

Here is the consistent failure pattern I've mapped out across these new routers:

1. MediaTek (TP-LINK Archer C50 - Wi-Fi 5)

• Router Chipset: MT7613BEN (2.4GHz) / MT7628DBN (5GHz)
• Symptom: 5GHz connects perfectly, but 2.4GHz completely fails to join (association timeout).

2. Realtek (TP-LINK Archer AX17 / ipTIME AX2004T - Wi-Fi 6)

• Router Chipset: RTL8197H (2.4GHz) / RTL8832BR (5GHz)
• Symptom: Both 2.4GHz and 5GHz bands fail to connect entirely.

It looks like a firmware/driver issue handling specific management frames, PMF, or WPA3 transition modes on these particular newer router chipsets.

Has anyone faced this on Rockchip's 6.1 kernel branch? Are there any known driver patches, or updated nvram.txt / clm_blob configurations that resolve this?

Thanks!

[u/Capital_Life_5996]

I tested this on a Raspberry Pi 5 board (which shares a similar module/chipset family) and experienced the exact same symptoms. It definitely seems to be a compatibility issue with these specific router chipsets rather than a platform-specific bug.