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

[Ilpo Järvinen]

On Tue, 21 Oct 2025, FUKAUMI Naoki wrote:

> Hi Manivannan,
> 
> Thank you for your reply.
> 
> On 10/21/25 20:02, Manivannan Sadhasivam wrote:
> > On Tue, Oct 21, 2025 at 07:12:21PM +0900, FUKAUMI Naoki wrote:
> > > 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.
> > 
> > Both of these commits are merge commits and they seem to be not related to
> > PCI
> > or WiFi.
> > 
> > > 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?
> > > 
> > 
> > So the patch from Niklas [1] didn't solve the issue on these board + WiFi
> > chip
> > combo?
> 
> Yes, I am reproducing the issue with the patch applied, and it also reproduces
> on v6.17.
> 
> The RTL8852BE on the ROCK 5B+ is an onboard component, while the ROCK 5B uses
> an M.2 module; the issue does not appear on the ROCK 5A or ROCK 5 ITX+ even
> with the same M.2 module and the same kernel/userland.

Hi,

There have been quite a few changes into rtw89 post-6.16. Depending on 
how easy it is to reproduce the issue, a bisection might be useful to 
pinpoint the cause.

> Best regards,
> 
> --
> FUKAUMI Naoki
> Radxa Computer (Shenzhen) Co., Ltd.
> 
> > - Mani
> > 
> > [1]
> > https://lore.kernel.org/linux-pci/20251017163252.598812-2-cassel@kernel.org/
> > 
> 
> 
> 

-- 
 i.