From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <535D1E82.2080809@gmail.com> Date: Sun, 27 Apr 2014 19:13:06 +0400 From: Dmitry Grebennikov MIME-Version: 1.0 To: =?UTF-8?B?QmrDuHJuIE1vcms=?= CC: linux-bluetooth@vger.kernel.org Subject: Re: minipcie bluetooth card not detected References: <535D03F5.5040100@gmail.com> <878uqqdg1p.fsf@nemi.mork.no> In-Reply-To: <878uqqdg1p.fsf@nemi.mork.no> Content-Type: text/plain; charset=UTF-8; format=flowed Sender: linux-bluetooth-owner@vger.kernel.org List-ID: On 27.04.2014 18:04, Bjørn Mork wrote: > Dmitry Grebennikov writes: > >> Hello, >> I bought new Intel Wireless 7260 ac + BT card recently and installed >> to my laptop. >> Wifi works out of box with iwlwifi module + firmware. >> But the bluetooth adapter isn't recognized at all. >> What could be the problem with it? >> >> The driver for this card is available and installed (btusb with intel >> bt firmware). >> lsusb shows no bluetooth adapter (see attachment). >> Hcitool scan reports that "Device is not available: No such device" >> Dmesg and lspci outputs are also attached. > Yes, doesn't look like there is any USB device is detected at all, so > drivers don't really matter. > >> BIOS is upgraded to the last available update. > Are you 100% sure that the mini-PCIe slot has USB properly wired up? > Did the previous module include any USB functions, or do you have some > other USB mini-PCIe module (e.g. a 3G modem) to test it with? > > Does the laptop have any other mini-PCIe slots where you can test the > 7260 module? > > My impression is that laptop vendors don't necessarily wire up and test > stuff they don't use in their own hardware configurations, like USB > support in a mini-PCIe slot for intended for PCIe-only wlan cards. > > I have installed the same 7260 module in two older laptops with mixed > results regarding the BT function. In both cases, the 7260 module > replaced an older PCIe-only wlan module. I had to put a piece of tape > over the D- and D+ pins to avoid the USB part being detected when > installing in an Acer 3810tz. Otherwise the USB device was detected, > but reading the device descripor failed - resulting in annoying timeouts > both when the BIOS ran and later when Linux booted. I have similar > issues with my Thinkpad X301, but only occasionally on resume. So I > haven't yet disabled the USB part... I am hoping to fix the annoying > serialized probing on resume instead, but haven't gotten around to doing > that yet. > > I am pretty sure that both cases are caused by platform issues specific > to those laptop models, which were never intended to support any USB > module in those slots. > > But based on these results, I would not be surprised if there are > laptops out there with mini-PCIe slots completely without USB support. > That's actually better than the Acer variant IMHO, because you don't > have to figure out how to physically disable the USB pins yourself. > > > Bjørn Bjørn, Thanks for your answer. My previous wireless card was Broadcom BCM94313HMGB, also with both wifi & bt support. Bluetooth adapter was always detected. But there were more pins on BCM card than on Intel (some Intel 7260 pins have ho wire). May be the reason is more up-to-date mini-PCIe standard of Intel card, which is not supported by the PCIe slot of the motherboard ?? Intel have some information about the PCIe standard requirements here: http://www.intel.com/support/wireless/wlan/sb/CS-031167.htm If so, what could be the workarounds? I now there are some adapters from mini-PCIe to SATA or USB. But I'm not sure if the speed of connection would be the same as via mini-PCIe... Dmitry Grebennikov