[Bluez-users] bluetooth/gprs problem

[Bluez-users] bluetooth/gprs problem

[Marian Gasparovic]

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Hi all,
I have i-Tec USB Dongle with Broadcom chip connected
to my notebook with Debian Woody. I am able to
establish bluetooth connection to my Siemens S55
mobile. After I start pppd for GPRS access to Internet
I get connected. I can ping any server for as long as
I want. But when I open any web page under Konqueror
or try ping -f, after couple of seconds (10-20) I
loose connection. First I see bluetooth going away on
mobil display, then gprs disconnect and after a minute
pppd finds it out too. Any suggestions where to look ?
I tried it with several notebooks, usb bluetooth
devices and mobiles and only this i-Tec USB Dongle
makes troubles. Under Windows XP it works without a
problem.
Thank you a lot


=====
===================
 Marian Gasparovic
===================
"The mere thought hadn't  even  begun  to speculate about the merest possibility of crossing my mind."




	
		
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Re: [Bluez-users] bluetooth/gprs problem

[Marcel Holtmann]

Hi Marian,

> I have i-Tec USB Dongle with Broadcom chip connected
> to my notebook with Debian Woody. I am able to
> establish bluetooth connection to my Siemens S55
> mobile. After I start pppd for GPRS access to Internet
> I get connected. I can ping any server for as long as
> I want. But when I open any web page under Konqueror
> or try ping -f, after couple of seconds (10-20) I
> loose connection. First I see bluetooth going away on
> mobil display, then gprs disconnect and after a minute
> pppd finds it out too. Any suggestions where to look ?
> I tried it with several notebooks, usb bluetooth
> devices and mobiles and only this i-Tec USB Dongle
> makes troubles. Under Windows XP it works without a
> problem.

this can be a dongle problem, because the dongle contains a Broadcom
chip and we already know that under some weird circumstances this is
buggy. But actually I think that your PPP setting are not correct for a
GPRS dialin. Check the some GPRS+PPP HOWTO's.

If you really want to be sure that this is no Bluetooth problem you must
run "hcidump -w <file>" as root and send us the resulting dump file.

Regards

Marcel




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Re: [Bluez-users] bluetooth/gprs problem

[Marian Gasparovic]

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forwarded to mailing list without attachments.

Marcel,
--- Marcel Holtmann <marcel@holtmann.org> wrote:
> Hi Marian,
> 
> > I have i-Tec USB Dongle with Broadcom chip
> connected
> > to my notebook with Debian Woody. I am able to
> > establish bluetooth connection to my Siemens S55
> > mobile. After I start pppd for GPRS access to
> Internet
> > I get connected. I can ping any server for as long
> as
> > I want. But when I open any web page under
> Konqueror
> > or try ping -f, after couple of seconds (10-20) I
> > loose connection. First I see bluetooth going away
> on
> > mobil display, then gprs disconnect and after a
> minute
> > pppd finds it out too. Any suggestions where to
> look ?
> > I tried it with several notebooks, usb bluetooth
> > devices and mobiles and only this i-Tec USB Dongle
> > makes troubles. Under Windows XP it works without
> a
> > problem.
> 
> this can be a dongle problem, because the dongle
> contains a Broadcom
> chip and we already know that under some weird
> circumstances this is
> buggy. But actually I think that your PPP setting
> are not correct for a
> GPRS dialin. Check the some GPRS+PPP HOWTO's.
> 
> If you really want to be sure that this is no
> Bluetooth problem you must
> run "hcidump -w <file>" as root and send us the
> resulting dump file.
> 
now it is very strange waht I see. First I tried some
experiments with uhci, uhci(je) and ohci, nothing
helped. Then I tried hcidump -w and I was able to surf
half an hour without a problem !!! Then I restarted a
computer, surfing worked, but I was aborted after
several minutes. Now I have hcidump output I hope you
will find something there. And another thing - when I
restart my notebook, I have to restart bluez-utils and
bluez-sdp before I can connect, otherwise pppd doesn't
connect with /dev/rfcomm0:connection refused. I even
attach my ppp chatscript and peer config files.
Any help ?
Thank you



	
		
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Re: [Bluez-users] bluetooth/gprs problem

[Marcel Holtmann]

Hi Marian,

> now it is very strange waht I see. First I tried some
> experiments with uhci, uhci(je) and ohci, nothing
> helped. Then I tried hcidump -w and I was able to surf
> half an hour without a problem !!! Then I restarted a
> computer, surfing worked, but I was aborted after
> several minutes. Now I have hcidump output I hope you
> will find something there. And another thing - when I
> restart my notebook, I have to restart bluez-utils and
> bluez-sdp before I can connect, otherwise pppd doesn't
> connect with /dev/rfcomm0:connection refused. I even
> attach my ppp chatscript and peer config files.

after getting the full dump the important part is this

	> ACL data: handle 0x0006 flags 0x01 dlen 10
	    L2CAP(d): cid 0x40 len 329 [psm 3]
	      RFCOMM(d): UIH: cr 0 dlci 2 pf 1 ilen 323 fcs 0x5c 
	> HCI Event: Disconn Complete(0x05) plen 4
	  00 06 00 22 

It is not a PPP error, because the remote device (your phone)
disconnects the ACL link with "LMP Response Timeout" error. Actually
this is because the Broadcom dongle has a buggy link manager or your
phone needs a firmware update. However this is a firmware problem in one
of your two device and we can actually do nothing to fix it.

Regards

Marcel




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Re: [Bluez-users] bluetooth/gprs problem

[Marian Gasparovic]

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Now a question I hate to ask : How can it work under
XP ? It works there without a problem.
Marian

--- Marcel Holtmann <marcel@holtmann.org> wrote:
> Hi Marian,
> 
> > now it is very strange waht I see. First I tried
> some
> > experiments with uhci, uhci(je) and ohci, nothing
> > helped. Then I tried hcidump -w and I was able to
> surf
> > half an hour without a problem !!! Then I
> restarted a
> > computer, surfing worked, but I was aborted after
> > several minutes. Now I have hcidump output I hope
> you
> > will find something there. And another thing -
> when I
> > restart my notebook, I have to restart bluez-utils
> and
> > bluez-sdp before I can connect, otherwise pppd
> doesn't
> > connect with /dev/rfcomm0:connection refused. I
> even
> > attach my ppp chatscript and peer config files.
> 
> after getting the full dump the important part is
> this
> 
> 	> ACL data: handle 0x0006 flags 0x01 dlen 10
> 	    L2CAP(d): cid 0x40 len 329 [psm 3]
> 	      RFCOMM(d): UIH: cr 0 dlci 2 pf 1 ilen 323 fcs
> 0x5c 
> 	> HCI Event: Disconn Complete(0x05) plen 4
> 	  00 06 00 22 
> 
> It is not a PPP error, because the remote device
> (your phone)
> disconnects the ACL link with "LMP Response Timeout"
> error. Actually
> this is because the Broadcom dongle has a buggy link
> manager or your
> phone needs a firmware update. However this is a
> firmware problem in one
> of your two device and we can actually do nothing to
> fix it.
> 
> Regards
> 
> Marcel
> 
> 
> 
> 
>
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Re: [Bluez-users] bluetooth/gprs problem

[Marcel Holtmann]

Hi Marian,

> Now a question I hate to ask : How can it work under
> XP ? It works there without a problem.

I think it uses another MTU on L2CAP level or the granting of credits on
the RFCOMM layer is done in another way which actually may results in a
slower connection, but also may not causes a link manager problem.

The point is that the phone detects a LMP response timeout, so I would
say that the phone works correct and the dongle has the problem. But
without a protocol analyser that can sniff LMP I can't tell you anything
more. Try to buy a CSR based dongle and see if the problem still exists.

Regards

Marcel




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[Bluez-users] bluetooth networking

[Marian Gasparovic]

Hi everybody,
Is there anybody out there who can point me to the
right direction, how to implement bluetooth network
between Debian and WXP ? I have found several
fragments of information, but nothing complete.
Thank you a lot.


=====
===================
 Marian Gasparovic
===================
"The mere thought hadn't  even  begun  to speculate about the merest possibility of crossing my mind."




	
		
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Re: [Bluez-users] bluetooth networking

[Michal Semler]

It depends on BT software you use on XP.
Check out pand and dund daemons

Michal

On Monday 10 of May 2004 15:16, Marian Gasparovic wrote:
> Hi everybody,
> Is there anybody out there who can point me to the
> right direction, how to implement bluetooth network
> between Debian and WXP ? I have found several
> fragments of information, but nothing complete.
> Thank you a lot.
>
>
> =====
> ===================
>  Marian Gasparovic
> ===================
> "The mere thought hadn't  even  begun  to speculate about the merest
> possibility of crossing my mind."
>
>
>
>
>
>
> __________________________________
> Do you Yahoo!?
> Win a $20,000 Career Makeover at Yahoo! HotJobs
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>
>
> -------------------------------------------------------
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