Re: [Bluez-users] Linux + Bluez problem

[Marcel Holtmann <marcel@holtmann.org>]

Hi Laszlo,

> I have a problem with the Bluetooth connection between my computer and
> my phone. Sometimes it drops the Bluetooth connection, I could reproduce
> it in two different ways:
> 
> case #1
> I use GPRS with my phone, the phone is connected to my computer using
> Bluetooth. When I try to retrieve a page with images, the Bluetooth
> connection fails with high probability (90 %).
> 
> I use /dev/rfcomm2 to access DUN (channel 1) service of my phone.
> I monitored the Bluetooth connection with l2ping:
> 
> # l2ping 00:60:57:2F:11:8C
> ...
> 0 bytes from 00:60:57:2F:11:8C id 215 time 94.99ms
> 0 bytes from 00:60:57:2F:11:8C id 216 time 121.83ms
> 0 bytes from 00:60:57:2F:11:8C id 217 time 26.51ms
> no response from 00:60:57:2F:11:8C: id 218
> no response from 00:60:57:2F:11:8C: id 219
> no response from 00:60:57:2F:11:8C: id 220
> no response from 00:60:57:2F:11:8C: id 221
> Recv failed: Software caused connection abort
> #

don't use l2ping. Maybe your phone don't likes it. Run hcidump and look
the packages on the HCI layer.

> At this point, the pppd drops the connection and the Bluetooth subsystem
> will be unusable until I remove and re-insert the USB dongle (for the sw 
> and
> hw specification, see the end of the mail).
> 
> Unfortunately I have only one Buetooth device, so I could not determine 
> whether the error is in the device, the driver or anything else.
> 
> 
> case #2
> I use p3nfs package (5.12) to mount my phone (Symbian Series 60). I 
> mounted the phone and did some tests:
> - in a loop
>  - copy a large (3MB) file to the phone
>  - wait 20 seconds
>  - delete the file
> - monitor the Bluetooth connection
> 
> I found that the Bluetooth connection failed just like when I used GPRS.
> 
> Used SW:
> - Linux kernels 2.4.22 and 2.4.23 (with and without -mh1 patch for both)
> - Debian Woody and Sarge
> - bluez-libs-2.4 with bluez-utils-2.3
> - bluez-libs-2.5 with bluez-utils-2.4
> 
> Used HW:
> - Nokia 3650 (sw ver 3.16)
> - Epox BT-DG03 USB dongle

what do "hciconfig -a" say? Do you have SCO support activated for the
USB driver? If yes, try without it. Change from usb-uhci to uhci or vice
versa.

Regards

Marcel




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