Re: [Bluez-users] Old Socket CF BT hangs

[Marcel Holtmann <marcel@holtmann.org>]

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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