View source for IBM Integrated Bluetooth IV with 56K Modem (BMDC-3)

__NOTOC__
{| width="100%"
|style="vertical-align:top" |
|style="vertical-align:top" |
<div style="margin:0px; border: 1px solid #dfdfdf; padding: 0em 1em 1em 1em; background-color:#F8F8FF; align:right;">
=== IBM Integrated Bluetooth IV with 56K Modem (BMDC-3) ===
This is a combination USB Bluetooth and AC'97 Modem Adapter that is installed in a [[CDC slot]].

=== Features ===
* Chipset: Broadcom BCM2035 Bluetooth Controller and Conexant SmartV.92 Softmodem DSP
* Speeds: 434/723 Kbps (Bluetooth 1.2) and 33.6/56.6 Kbps (V.34/V.90/V.92/K56flex)
* PCI ID: Varies, depends on the AC'97 modem controller's PCI ID
* USB ID: 0A5C:201E
* Headers: One 2-pin connector, one Hirose U.FL connector
</div>
|}
=== Part numbers ===
* 39T0026, 39T0024, 39T0022

=== Linux driver ===
The Bluetooth device is implemented using USB. Enabling/disabling bluetooth (i.e. by use of {{key|Fn}}{{key|F5}}) leads to USB connect and disconnect events. The modem on the other hand, is implemented using AC'97. Drivers for the modem can be found in the [[Conexant HSF modem drivers]] page.

As Bluetooth is implemented using USB, this will only work with USB drivers enabled:
:{{cmdroot|modprobe uhci-hcd ; modprobe ehci-hcd}}

The <tt>bcm203x</tt> kernel module, which is included in recent kernels, supports this chipset. You have to make sure to '''compile it as a module''' since the kernel won't detect the chip at boottime (when Bluetooth is turned off).

Use BlueZ-utils (http://www.bluez.org/) or fancier software like the GNOME Bluetooth subsystem (http://usefulinc.com/software/gnome-bluetooth) to use the device. To set it up, see the [[How to setup Bluetooth]] page.

Some problems have been reported using bluetooth after a suspend/resume cycle on the T43. These problems can be mitigated by unloading the USB kernel modules (uhci_hcd, ehci_hcd, hci_usb, bcm203x) before the machine is put to sleep, and by re-loading these modules when the machine wakes up again.

You could also try [http://www.kernel.org/git/?p=linux/kernel/git/holtmann/bluetooth-2.6.git;a=commitdiff_plain;h=dcdcf63ef12dc3fbaa17a6d04f16ada8e63bb4d0;hp=2b86ad21deec4c47a1f0089298f12e4038c2aa68 this patch] which adds suspend/resume support to the hci_usb module. This patch is already in kernel 2.6.18-rc1. Or you use the [http://www.holtmann.org/linux/kernel/patch-2.6.17-mh4.gz bluez mh4-patch for 2.6.17] which adds suspend/resume and also fixes an issue with the SCO buffer size.

On a T43p you must ensure that you call hotplug (re)start upon resume or you will lose bluetooth functionality. See the ACPI area for sample suspend scripts, or if bluetooth flakes on a debian system at any time you can manually call
:{{cmdroot|/etc/init.d/hotplug restart}}
and it will come back with another {{key|Fn}}{{key|F5}} press.

== This card may be found in ==
* {{T43}}, {{T43p}}
* {{X32}}, {{X41}}, {{X41 Tablet}}
* {{R52}}

[[Category:Bluetooth Adapters]] [[Category:Modem Devices]]