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 4EAD238333A for ; Fri, 7 Aug 2026 16:12:37 +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=1786119157; cv=none; b=fnGewaovpPtgqH0weIkLq4rrVL5+FzSJoBzgmupmgJ1IebcmKFqahl/BZNMqfpYMbEWQFcqXywGtK8TldnyK/ZmSbYpJS+eegQW2w9SwOGwmyNp8r3d/1Et78+PL0kRLlU8RCM8+HqlJCDUOIYgQiAzH9AATTTac9F4Vt6CQOls= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786119157; c=relaxed/simple; bh=tYij8sBsv8LBqBaFJ/k1HPE1sow/WUQsYKN/JFsEc98=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=qzmNE+7iCWV/CHES55o3VVF5ciMSov0hKgsCDDspXPyR6EFkf+DHEFXPfFJgMw51TqJjJpuDjsE6lLsXxtYiVwk9+sKKnPjiyGV9+HBpA/iXnpRCww4hTzfkHypd0dpX+1ImDgXF63e11Qq1TSa4S6ItO4JkX6NJCP2RatPTnWQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=k4zcB27i; 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="k4zcB27i" Received: by smtp.kernel.org (Postfix) with ESMTPS id DF41AC2BCC7 for ; Fri, 7 Aug 2026 16:12:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1786119156; bh=tYij8sBsv8LBqBaFJ/k1HPE1sow/WUQsYKN/JFsEc98=; h=From:To:Subject:Date:In-Reply-To:References:From; b=k4zcB27i3mwmmTzqtOj5aFH0mukmL/TUDOsgiYRDmH1o+qNCwHSVqLCEPH0vAOAOc IbxSZvQtSTXIOofXLPhIWqklh2OaiLs52ftTx2mAMRfPM8zWCM+mLHxU9X6DzhsksV 5+ygbZM05pRMn/qipIgkqRjjKYr+JzY/CgiIjLzQC4IVOk4QyfigWpYRK68f19mV48 wMAQN0D2ecpyoHcTd/eOTEcDo3Ab30fI2UxhPKqqRAc8jYR/CzCsN2+nUuYkpy65lX c+7b2YEfkKwhd8aiRrdmOJ4WtAU33EiXdjRNARdbA+j0dJD8BukmWYsgws21ncyCJu 98YISpf/12Wqw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id C3C05C53BBF; Fri, 7 Aug 2026 16:12:36 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-bluetooth@vger.kernel.org Subject: [Bug 221754] RTL8852BE Bluetooth (0bda:b853) fails to init: Opcode 0xfcf0 failed: -16, hci0 never registers with mgmt (BD Address 00:00:00:00:00:00) Date: Fri, 07 Aug 2026 16:12:36 +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: serge.brun@gmail.com X-Bugzilla-Status: REOPENED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: linux-bluetooth@vger.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status resolution 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=3D221754 serge.brun@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|ANSWERED |--- --- Comment #9 from serge.brun@gmail.com --- Agreed, reopening makes sense =E2=80=94 thanks q234rty for flagging the ups= tream patch, and Adam for confirming that mihaits repo works with Secure Boot too (via mokutil --import, good tip for anyone else on Secure Boot). To be clear about what's actually been verified so far: the DKMS workaround (https://github.com/mihaits/rtl8852bd-bt-linux) is a real, working fix at t= he driver level. I've confirmed it myself (comment #6) and Adam has too. But i= t's a third-party out-of-tree module, not a mainline fix, and per the repo's own "Upstreaming" note, it was blocked specifically on Realtek needing to publi= sh proper firmware support which sounds like exactly what's now happening via Hilda Wu's patch. Given that, this should stay open until: 1. The btrtl firmware-format patch lands in mainline, and 2. The actual eco-4 firmware for this chip is published in linux-firmware= .git Will keep an eye on the patch thread and report back once I can test agains= t a kernel that includes it. In the meantime, mihaits workaround remains a solid stopgap for anyone hitting this =E2=80=94 for the sake of clarity it'= s a bridge, not the destination. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=