Re: Problem with 1394 Cardbus

On 6 Oct, David Ranch wrote:
> If I run "/etc/rc.d/init.d/pcmcia start" with the firewire card installed, the
> machine will hang solid. If I start PCMCIA services without the card
> installed, the PCMCIA subsystem and wireless card will come up fine. If I then
> install the FW card, the system will usually initialize the FW card and
> everything will work ok. But, occasionally, the system will still lock up.
>
> Any thoughts on how to troubleshoot this issue or should I take this up with
> the PCMCIA folks?

This could be either a problem with CardBus support on your
laptop or bugs in ohci1394 WRT CardBus functionality.

We could say ohci1394 is a driver for PCI cards that also
supports CardBus cards to some degree as a bonus... For instance,
suspend/resume is not implemented, and hot ejection was not
really working the last time I checked. Ohci1394 is one of the
PCMCIA client drivers that came from outside of the pcmcia-cs
project but never became integral part of it for technical
reasons (dependence on the changing ieee1394 mid level driver).

Because of this, the people working on PCMCIA/CardBus cannot
really help to debug this (and/or might not want to help out).

What you can do yourself is e.g.
- see if there is a bad interaction with the Mini-PCI WLAN card,
- insert debug messages into the ohci1394 sources to figure out
  in which function it locks up (...if it actually locks up in
  ohci1394 and not in some other kernel region),
- try the external pcmcia-cs drivers and see if it works better.
  There are some directions at www.linux1394.org how to make
  ohci1394 work with external pcmcia-cs. But be aware that this
  method is principally less stable than ohci1394 together with
  the internal CardBus driver (2.4-style yenta socket).

-- 
Stefan Richter
-=====-=--== =-=- -=-==
http://arcgraph.de/sr/
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