From: Marcel Holtmann <marcel@holtmann.org>
To: BlueZ users <bluez-users@lists.sourceforge.net>
In-Reply-To: <20061013114406.GA857@jolt.modeemi.cs.tut.fi>
References: <20061013114406.GA857@jolt.modeemi.cs.tut.fi>
Date: Sun, 15 Oct 2006 15:14:57 +0200
Message-Id: <1160918097.23675.15.camel@localhost>
Mime-Version: 1.0
Subject: Re: [Bluez-users] Old Socket CF BT hangs
Reply-To: BlueZ users <bluez-users@lists.sourceforge.net>
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Sender: bluez-users-bounces@lists.sourceforge.net
Errors-To: bluez-users-bounces@lists.sourceforge.net

Hi Anssi,

> I have this old Socket CF bluetooth card which uses the dtl1_cs driver.
> It works fine, except it hangs every now and then, when using it for net
> access via a GSM phone. By hanging I mean that data stops flowing over
> the ppp interface and the card won't respond to hcitool scan or other
> similar commands, I just get a timeout. I need to do pccardctl eject 1;
> pccardctl insert 1 to recover. I can't find any error messages in the
> logs when this hang occurs.
> 
> Usually I can cause the hang by opening a bunch of links in a web
> browser. The odd thing is that this seems to be more common the faster
> the phone is. With my old Ericsson T68 (GPRS) it's very rare but with
> my newer Nokia 6820 (EDGE) it's annoyingly common.
> 
> I'm currently running Arch Linux with kernel 2.6.17-beyond4 on an IBM
> Thinkpad X20. Bluez-libs and bluez-utils are version 3.1. However,
> I noticed this problem in 2005 summer already with I think kernel 2.6.11
> and 2.6.12.
> 
> Has this sort of thing been reported by anyone else?

when I wrote the dtl1_cs driver it was back in 2001 and most devices
where not capable of high speeds like EDGE. So this is actually a driver
problem, but at the moment I have no idea on how to fix it. I haven't
looked at this driver for a very long time.

Regards

Marcel


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