From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <4C84BFB2.3000802@linux.intel.com> Date: Mon, 06 Sep 2010 12:17:22 +0200 From: Sebastien Cayetanot MIME-Version: 1.0 To: Luiz Augusto von Dentz CC: linux-bluetooth@vger.kernel.org Subject: Re: BD address changed but pairing failed References: <4C80CE3E.8020004@linux.intel.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Le 9/4/2010 9:07 PM, Luiz Augusto von Dentz a écrit : > Hi, > > On Fri, Sep 3, 2010 at 1:30 PM, Sebastien Cayetanot > wrote: >> All, >> >> I'm currently facing an issue regarding the pairing of BT devices after >> having change the BD_Addr. >> >> >> I use a TI chip and also use hci command or bdaddr script to modify the >> bd_addr >> >> I'm also using the bluez-4.69 >> >> I change the BD_Addr using the bdaddr scripts provided into the bluez src. >> >> When other devices scan me, the new address is seen but hciconfig still show >> the old BD address. >> >> I have sent the hcitool cmd to read the bd_addr and after the hciconfig >> return the one. >> >> I'm discoverable with the new BD address. >> >> But When I try to pair an A2DP headset or BT Keyboard/Mouse it failed since >> BD_Addr change. >> >> I have try to use directly the hcitool cmd using the vendor specific command >> but I got the same result. >> >> I have tried to kill bluetooth daemon and restart it after having change the >> bd_addr. Still failing. >> >> I have tried to kill bluetooth daemon before changing the BD adress and >> start it after the change it still fail. >> >> I have also tried to power on/off interface. still the issue >> >> I think that something is "broken" is bluez when the BD_Addr is changed. >> >> Is someone already seen this issue ? > I don't think you are suppose to change the address like that, it is > supposed to be done once in the chip initialization and then keep it > like that forever, so I guess there is something wrong if the chip is > already initialize with the wrong address. What are you trying achieve > with this? > Surely not but regarding some tests scripts I have seen on bluez, I suppose that's possible. Perhaps, some chips support and other don't. I have tried to change the BD_Address during the BT initialization and prior any HCI command sent to the chip and it works. I expected the same behavior than observed on WLAN : I have changed the WLAN MAC address after and everything works fine. Regards. Sebastien