From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758938Ab2C2Der (ORCPT ); Wed, 28 Mar 2012 23:34:47 -0400 Received: from senator.holtmann.net ([87.106.208.187]:36411 "EHLO mail.holtmann.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758638Ab2C2Deo (ORCPT ); Wed, 28 Mar 2012 23:34:44 -0400 Message-ID: <1332992022.1870.183.camel@aeonflux> Subject: Re: [PATCH] Revert "Bluetooth: Always enable management interface" From: Marcel Holtmann To: Keith Packard Cc: Gustavo Padovan , linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, Johan Hedberg Date: Thu, 29 Mar 2012 05:33:42 +0200 In-Reply-To: <86r4wct9q7.fsf@sumi.keithp.com> References: <1332983958-2734-1-git-send-email-keithp@keithp.com> <20120329022839.GA26111@joana> <86r4wct9q7.fsf@sumi.keithp.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 (3.2.3-2.fc16) Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Keith, > > A consequence is that you'll need to use newer version of bluez, at least 4.99. > > Or call the bluetooth daemon (from a pre 4.99 version) with a parameter to > > disable the new interface: > > That's not OK -- you're breaking user space with this kernel change. I > know I get bashed every time I suggest that we 'fix' the kernel and > require new user space X bits... I think we actually have a broken user space in this case. I do have a hunch on what went wrong. It is not the kernel's fault here. If I am anywhere right, then bluetoothd fails to bring up the device. That is why you don't see anything with "hcitool dev", but the device should be present. Check "hciconfig -a". Check your bluetoothd startup line and add "-P mgmtops". That will disable the broken plugin. Regards Marcel