Intermittant bluetooth keyboard

Daniel Benoy daniel at benoy.name
Tue Sep 9 16:23:20 CEST 2008


I completely drained the battery in my keyboard and now it's working every time.

I wish that there was some way to change this LMP timeout though.  Try as I might I couldn't find it.

On Monday 08 September 2008 13:23:15 Daniel Benoy wrote:
> I set up my bluetooth keyboard on my openmoko phone using the 'new' (In other words, not hidd, but still dbus) input interface, and it only works like 10% of the time.  That means when I turn it on it should connect and start working.  Unfortunately, it only works about 25% of the time, and I have to switch it off and on frequenly in order to get it to finally connect.  I get this output from hcidump -V when it doesn't work:
> 
> > HCI Event: Connect Request (0x04) plen 10
>     bdaddr 00:0A:DF:00:24:59 class 0x002540 type ACL
> < HCI Command: Accept Connection Request (0x01|0x0009) plen 7
>     bdaddr 00:0A:DF:00:24:59 role 0x00
>     Role: Master
> > HCI Event: Command Status (0x0f) plen 4
>     Accept Connection Request (0x01|0x0009) status 0x00 ncmd 1
> > HCI Event: Connect Complete (0x03) plen 11
>     status 0x22 handle 42 bdaddr 00:0A:DF:00:24:59 type ACL encrypt 0x00
>     Error: LMP Response Timeout
> 
> The difference in time between 'Accept Connection Request' and 'LMP Response Timeout' is about 3 seconds.  I was under the impression that LMP negociation was supposed to time out after 30 seconds?
> 
> Is there something I'm doing wrong?  Am I not interprating this correctly?
> 
> If it does work I get something like this:
> 
> > HCI Event: Connect Request (0x04) plen 10
>     bdaddr 00:0A:DF:00:24:59 class 0x002540 type ACL
> < HCI Command: Accept Connection Request (0x01|0x0009) plen 7
>     bdaddr 00:0A:DF:00:24:59 role 0x00
>     Role: Master
> > HCI Event: Command Status (0x0f) plen 4
>     Accept Connection Request (0x01|0x0009) status 0x00 ncmd 1
> > HCI Event: Link Key Request (0x17) plen 6
>     bdaddr 00:0A:DF:00:24:59
> 
> .
> .
> .
> 
> (And then link key request reply and so on it does its negociation and there you have it)



-- 
Daniel Benoy
http://daniel.benoy.name



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