broken re(4)

[Wilko Bulte]

Quoting Oliver Fromme, who wrote on Fri, May 30, 2008 at 01:44:43PM +0200 ..
> Gerrit Kühn wrote:
>  > As Oliver already suggested, I will take out the controller and see what
>  > happens then.
>  > 
>  > Talking about this controller: This is also the only board I am using with
>  > PCI cards (and thus with a PCI riser) at all. I remember vaguely that I
>  > had a few problems getting the controller to work in the riser card when
>  > it put the system together. The riser has two ports, and the controller
>  > would only work in the upper one afaicr.
> 
> That rings a bell ...
> 
> I remember reports of riser cards that apparently changed
> the timing on the PCI bus so they were only marginally
> compliant with the spec, or maybe not even that anymore.
> 
> If you try to remove the controller, please also remove
> the riser card.  It could well be that it's causing
> problems, especially if it's on the same PCI bus as the
> onboard re(4) interfaces.
> 
> There are various kinds of riser cards (passive, active,
> with fixed IRQs, or with jumpers, and so on).  For a
> related discussion see this one, for example:
> http://lkml.org/lkml/2007/6/24/39
> 
> Typing "pci riser card jumper" in Google will give you
> many more pages with interesting (or frightening) stuff
> to read.

Well, if you know how the PCI bus electrically works this kind of problem is
hardly a surprise ;-)

-- 
Wilko Bulte				wilko at FreeBSD.org