From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C792C4743F for ; Tue, 8 Jun 2021 18:20:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3324E6136D for ; Tue, 8 Jun 2021 18:20:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234036AbhFHSWe (ORCPT ); Tue, 8 Jun 2021 14:22:34 -0400 Received: from netrider.rowland.org ([192.131.102.5]:52861 "HELO netrider.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S233062AbhFHSWc (ORCPT ); Tue, 8 Jun 2021 14:22:32 -0400 Received: (qmail 1813769 invoked by uid 1000); 8 Jun 2021 14:20:38 -0400 Date: Tue, 8 Jun 2021 14:20:38 -0400 From: Alan Stern To: Larry Finger Cc: linux-usb@vger.kernel.org, LKML , ierturk@ieee.org Subject: Re: Strange problem with USB device Message-ID: <20210608182038.GA1812516@rowland.harvard.edu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 08, 2021 at 12:41:23PM -0500, Larry Finger wrote: > Hi, > > In https://bugzilla.suse.com/show_bug.cgi?id=1186889, a user is > reporting that his Bluetooth component of a Realtek RTL8822CE is not Is that a USB device? That is, does it connect to the computer via a USB cable? I'll assume it does... > being found in openSUSE's kernel 5.3.18. His lsusb scan is as follows: > > $ lsusb > Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub > Bus 001 Device 003: ID 13d3:56c9 IMC Networks HP TrueVision HD Camera > Bus 001 Device 002: ID 045e:07fd Microsoft Corp. Nano Transceiver 1.1 > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > > The Bluetooth device is found and works in Windows 10, where the Device > Manager reports hardware ID's of 0bda:b00c. This combination is in > driver btusb. > > Is there a bug in the USB bus scan in kernel 5.3.18 that has since been > fixed, or is there still a bug that misses this device? Given only the information you have provided, it is impossible to answer that question. Broadly speaking, lots of bugs in the USB subsystem have been fixed since kernel 5.3.18, but I don't know if any of them would affect detecting new devices on the bus like this. One thing you might try is to turn on USB debugging before plugging in the device: echo 'module usbcore =p' >/sys/kernel/debug/dynamic_debug/control The additional information this adds to the dmesg log may be helpful. Alan Stern