ROCK 5B/5B+ RTL8852BE probe failure on v6.18-rc

FUKAUMI Naoki naoki at radxa.com
Tue Oct 21 03:12:21 PDT 2025


Hi,

I've observed an issue where the RTL8852BE fails to probe on the ROCK 5B 
and ROCK 5B+ using Linux v6.18-rc.

[    7.719288] rtw89_8852be 0002:21:00.0: loaded firmware 
rtw89/rtw8852b_fw-1.bin
[    7.720192] rtw89_8852be 0002:21:00.0: enabling device (0000 -> 0003)
[    7.728596] rtw89_8852be 0002:21:00.0: Firmware version 0.29.29.5 
(da87cccd), cmd version 0, type 5
[    7.729407] rtw89_8852be 0002:21:00.0: Firmware version 0.29.29.5 
(da87cccd), cmd version 0, type 3
[   11.420623] rtw89_8852be 0002:21:00.0: failed to dump efuse physical map
[   11.422859] rtw89_8852be 0002:21:00.0: failed to setup chip information
[   11.425273] rtw89_8852be 0002:21:00.0: probe with driver rtw89_8852be 
failed with error -16

This issue does not reproduce on v6.16. The issue does not reproduce 
with the MT7921E or the AX210. Furthermore, the issue does not reproduce 
on the ROCK 5A or the ROCK 5 ITX+.

The issue appears not to reproduce in or prior to commit 14bed9bc81ba. 
The issue reproduces, albeit with a low incidence rate, after commit 
bf76f23aa1c1. It reproduces, but not 100%, on v6.17, and is likely 100% 
reproducible on v6.18-rc.

The dmesg output and the result of lspci -vv when the issue occurs can 
be found below:
  https://gist.github.com/RadxaNaoki/bf57b6d3d88c1e4310a23247e7bac9de

What should I investigate next?

-- 
FUKAUMI Naoki
Radxa Computer (Shenzhen) Co., Ltd.



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