Re: [Bluez-users] MS Mouse + Internal Dell adaptor

[Marcel Holtmann <marcel@holtmann.org>]

Hi Cameron,

> I have a Dell Inspiron 8500 running Ubuntu Feisty which has an internal
> bluetooth adaptor. This adaptor is a v1.1 adaptor.
> 
> Some time ago, I purchased a MS bluetooth mouse (Microsoft IntelliMouse
> Explorer for Bluetooth) and I had no luck getting it working with the
> internal bluetooth adaptor. Since then, I've used the supplied dongle
> and accepted that the mouse would not work (a v1.2 mouse) with the
> internal adaptor.
> 
> Just now, I experimented again, and it still does not work. By "not
> work" I mean that I can scan it (hcitool scan), connect to it 
> (hidd --connect / --search), but the movement is very jerky and delayed.
> i.e. there would be at least a three second lag and the mouse pointer
> will jump from one end of the screen to the other.
> 
> However, I just noticed that while I am running a scan or inquiry
> (hcitool scan / inq), the mouse works properly! When the scan finishes,
> it goes back to being jerky / laggy.
> 
> Does this symptom ring any bells with anyone here? And any ideas how to
> make the mouse work permanently with the internal adaptor?

the Ubuntu kernel has automatic sniff mode on by default. You might
wanna switch that off via /sys/class/bluetooth/hci0/idle_timeout. Simply
echo 0 into that file.

Some Bluetooth 1.1 chips behave strange with the Bluetooth HID devices
and their usage of sniff mode. I have seen that before. You might also
check with Dell if you can get a firmware update for your adapter.

Regards

Marcel



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