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Thu, 17 Sep 2026 00:06:28 -0700 (PDT) Received: from localhost.localdomain ([94.29.126.47]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-3a5dafdca36sm12946991fa.35.2026.09.17.00.06.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Sep 2026 00:06:28 -0700 (PDT) From: Maxim Skokov To: pkshih@realtek.com Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Maxim Skokov Subject: Re: rtw89: BT connect state differs between scoreboard and bt_info on RTL8851B Date: Thu, 17 Sep 2026 10:06:09 +0300 Message-ID: <20260917070609.11949-1-skokovmaksimevg@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <776cd43f75f14571943462bd5fc6cb64@realtek.com> References: <20260915122625.6341-1-skokovmaksimevg@gmail.com> <20260915123718.7239-1-skokovmaksimevg@gmail.com> <25270f2066784a02806daa352643be53@realtek.com> <20260916053228.10042-1-skokovmaksimevg@gmail.com> <776cd43f75f14571943462bd5fc6cb64@realtek.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > To be clear. The problem you encountered was failed to connect an AP, or > this was newly introduced by the patch I shared? Not introduced by the patch. It predates it by a day. On 15 September, with an unmodified driver, the same machine logged 21 "authentication timed out" and one 4WAY_HANDSHAKE_TIMEOUT in a single boot, with an A2DP sink connected and playing: wlp2s0: authentication with 02:0c:43:16:60:e8 timed out wlp2s0: deauthenticated from b2:39:56:12:24:f0 (Reason: 15=4WAY_HANDSHAKE_TIMEOUT) It follows the audio, not the driver build. With the sink stopped, association completes in a few seconds on both the patched and the unpatched module; while it plays, the interface stays in STA mode retrying. That is the coexistence behaviour from the first mail in this thread. I mentioned it in the last one only to describe the conditions of the sampling, not as a regression. > The BTC_BSCB_BT_CONNECT should be set by BT firmware. The internal BT > expert is helping to dig the cause. Understood. In case it is relevant to what they find, btc_info here reports the BT side as [coex_version] : BT_FW_coex:0(Mismatch, desired:7) [sub_module] : BT_FW:0x0(patch) while the mailbox itself works, mailbox_avl:Y and raw_data updating. I can run any test build you want on RTL8851BE.