From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6B615472540 for ; Wed, 19 Aug 2026 12:07:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787141274; cv=none; b=OlIM7LyDaFmn8/6FYZNghYkub35F78FMpKh6xiy1DgbcDa7suYVwMBxdMy/+7fjq0vSvR0ihDogswAoBtjH8mq8TP3WLxjDBkVj1vef76zUgRtX5pPfKqlSzEOWpQ6Bk/NJeVNMXt7sI49xybU2McMOUKZgcUvvs8R+LQqG9KvM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787141274; c=relaxed/simple; bh=jPigUtaGPuZXDmOBVKSjcn7CgoXP4YKKBZhpTY29nwU=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=VenUEXmOIzh/Pr28rxVXPmuqjQVKVfJ+wuTArzfGxuEStvr0+In8jFzIgxH4+lrnjMV2ldqnaseR/2QS/xCGnBzgLyrQuEgiyHKM8DcXfXxtIUwlyeNs5tTvTeLSmPZcooEnwt8BTPLlPX4msP3BijrdkRh3I7i1TcBSSNaBDpo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZonTF5+K; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZonTF5+K" Received: by smtp.kernel.org (Postfix) with ESMTPS id E174FC2BCC7 for ; Wed, 19 Aug 2026 12:07:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1787141273; bh=jPigUtaGPuZXDmOBVKSjcn7CgoXP4YKKBZhpTY29nwU=; h=From:To:Subject:Date:In-Reply-To:References:From; b=ZonTF5+KwSKG393NH9A/+OUHrlgx/GSgCwoLGkfv8mnxZWOvKFKBUSbj3OGC88BcU Ygy4sYISjnAhUoQXJsMxynwp/PlzUQZlubyT/W821kZ7CjCkhUJB4V8UhFZl8VRFbJ x82A9i5eNUi5IbantAS8+Ng1lTFUJZxbK++9KQg0Y9h33mTlVTIXY95wsLJ3iyYPTx UIgNDNHLG7hKFmkvQMJ7aqfOoRVGL7AFiwy5HTEd0cj2x3xVdM1cBzCdoW8ofcTD4D 4jmS56/CgomhBrzOI12l2V3MAdgYr/yQY8UOxCclxhtp8vMWJRL3RcrPl+a8Ky34Zw 0Bc8XeE1tg0LA== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id C69C8C53BC5; Wed, 19 Aug 2026 12:07:53 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-bluetooth@vger.kernel.org Subject: [Bug 80791] "Bluetooth: hci0: ACL packet for unknown connection handle" must be hidden behind "debug" Date: Wed, 19 Aug 2026 12:07:53 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Drivers X-Bugzilla-Component: Bluetooth X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: blocking X-Bugzilla-Who: kernel.org@engmark.name X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: linux-bluetooth@vger.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D80791 Victor Engmark (kernel.org@engmark.name) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kernel.org@engmark.name --- Comment #16 from Victor Engmark (kernel.org@engmark.name) --- Found this issue while looking for a reason why my Bose QC-45s were crackli= ng during playback. > kernel: Bluetooth: hci0: ACL packet for unknown connection handle 3837 (Oddly, it's even the same handle number as the two logs other people have posted above. Is there something special about that?) `sudo systemctl restart bluetooth` seems to have fixed it. Running NixOS unstable (26.11, commit ID 2fcb964de67fcf60b43471c55d5d99e61a9ccb5a) with bluez 5.86 Service config: ``` =E2=9D=AF cat /nix/store/zc356bzkix2dj7l63jpsphi89px6wc2x-system-units/bluetooth.service.= d/overrides.conf=20 [Unit] [Service] Environment=3D"LOCALE_ARCHIVE=3D/nix/store/dmm8l3wf59027myllvph9b0w5bzdllp8= -glibc-locales-2.42-67/lib/locale/locale-archive" Environment=3D"PATH=3D/nix/store/di26b1kkbammy0sj70nq5qzvfrh78wxl-coreutils= -9.11/bin:/nix/store/fcqbwp5hx5wh3lzf0457wmf0divknz7y-findutils-4.11.0/bin:= /nix/store/aak8d9mrdv9sgn0lcg7xss7wxdg9sqh3-gnugrep-3.12/bin:/nix/store/7mf= smbhsd3arnypipwm251rcd0b45riy-gnused-4.10/bin:/nix/store/r6sz8p6sd6c73fp9z8= nzl04dri7lyx8n-systemd-261.1/bin:/nix/store/di26b1kkbammy0sj70nq5qzvfrh78wx= l-coreutils-9.11/sbin:/nix/store/fcqbwp5hx5wh3lzf0457wmf0divknz7y-findutils= -4.11.0/sbin:/nix/store/aak8d9mrdv9sgn0lcg7xss7wxdg9sqh3-gnugrep-3.12/sbin:= /nix/store/7mfsmbhsd3arnypipwm251rcd0b45riy-gnused-4.10/sbin:/nix/store/r6s= z8p6sd6c73fp9z8nzl04dri7lyx8n-systemd-261.1/sbin" Environment=3D"TZDIR=3D/nix/store/2nndxyf3phkb5aggxm3c16sapa0f49kz-tzdata-2= 026c/share/zoneinfo" X-RestartIfChanged=3Dfalse CapabilityBoundingSet=3DCAP_NET_BIND_SERVICE ConfigurationDirectoryMode=3D0755 ExecStart=3D ExecStart=3D/nix/store/5w050dyskx5si0skc328b0q9mxbn5lmn-bluez-5.86/libexec/= bluetooth/bluetoothd "-f" "/etc/bluetooth/main.conf" LockPersonality=3Dtrue MemoryDenyWriteExecute=3Dtrue NoNewPrivileges=3Dtrue PrivateNetwork=3Dfalse PrivateTmp=3Dtrue PrivateUsers=3Dfalse ProtectControlGroups=3Dtrue ProtectKernelModules=3Dfalse ProtectKernelTunables=3Dfalse ProtectProc=3Dinvisible RestrictNamespaces=3Dtrue RestrictRealtime=3Dtrue RestrictSUIDSGID=3Dtrue SystemCallArchitectures=3Dnative SystemCallFilter=3D@system-service [Install] WantedBy=3Dbluetooth.target ``` bluez config: ``` =E2=9D=AF cat /etc/bluetooth/main.conf=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20 [General] ControllerMode=3Ddual Privacy=3Ddevice [LE] ConnectionLatency=3D0 MaxConnectionInterval=3D9 MinConnectionInterval=3D7 [Policy] AutoEnable=3Dtrue ``` --=20 You may reply to this email to add a comment. 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