Bug#1080181: realtek: it looks like there's something wrong with the firmware file rtw8851b_fw.bin 0.29.41.3

From	Lamome Julien <julien.lamome@wanadoo.fr>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1080181: realtek: it looks like there's something wrong with the firmware file rtw8851b_fw.bin 0.29.41.3
Date	2026-09-12 17:00 +0200
Message-ID	<NCxmV-gL70-3@gated-at.bofh.it> (permalink)
References	<Jhshj-8WyL-1@gated-at.bofh.it> <NAJVf-fN3T-9@gated-at.bofh.it> <Jhshj-8WyL-1@gated-at.bofh.it> <NAJVf-fN3T-9@gated-at.bofh.it>
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Hi,

With sid, wifi work since one year with stock kernel. And bluetooth work 
fine (connect to audio) since few day.


Le 07/09/2026 à 17:49, Maxim Skokov a écrit :
> I have the same PCI ID here and cannot reproduce this.
>
>    02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd.
>            RTL8851BE PCIe 802.11ax Wireless Network Controller [10ec:b851]
>            Subsystem: AzureWave Device [1a3b:6111]
>
> The card works on Debian trixie with the stock 6.12.107+deb13-amd64 kernel
> and firmware-realtek 20250410-2, which ships exactly the firmware version
> from the report:
>
>    rtw89_8851be 0000:02:00.0: loaded firmware rtw89/rtw8851b_fw.bin
>    rtw89_8851be 0000:02:00.0: Firmware version 0.29.41.3 (65cefb31)
>
> It also works with firmware-realtek 20260622-1~bpo13+1 from
> trixie-backports, which ships firmware 0.29.41.5, and on locally built
> 7.2 and 7.3-rc kernels.
>
> About the error itself: "fw security fail" is RTW89_FWDL_SECURITY_FAIL in
> drivers/net/wireless/realtek/rtw89/fw.c.  That value is reported back by
> the MCU on the card during firmware download, so the image was rejected by
> the hardware rather than by the driver.  Together with the same file
> working here, that points at something board or card specific rather than
> at the packaged firmware being broken.
>
> Two things that would help narrow it down:
>
>    - the subsystem ID, from "lspci -nn -v" for the wifi device, to see
>      whether this is a different card variant
>
>    - whether the newer firmware from trixie-backports changes anything

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Bug#1080181: realtek: it looks like there's something wrong with the firmware file rtw8851b_fw.bin 0.29.41.3 Maxim Skokov <skokovmaksimevg@gmail.com> - 2026-09-07 18:00 +0200
  Bug#1080181: realtek: it looks like there's something wrong with the firmware file rtw8851b_fw.bin 0.29.41.3 Lamome Julien <julien.lamome@wanadoo.fr> - 2026-09-12 17:00 +0200

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