[Asterisk-Users] TDM04B vs Dell

[James O. Sizemore III]

If this is a single CPU system try loading the smp kernel 
"yum install kernel-smp" then force this to boot in grub.conf
This will force your interrupts to be handled with IO-APIC
handler instead of the old style XT-PIC interrupts handler.

Switching to APIC from XT will normally fix a lot of interrupt
issues. If you have them. 




On Wed, 2005-01-05 at 17:35 -0800, Michael Swan wrote:
> At 06:53 PM 1/5/2005 -0600, you wrote:
> > > I've struggled for several days trying to get a Digium TDM04B 4-port
> > > wxfco card working on a Dell 1U PowerEdge 750 machine running
> > > Fedora Core 1. I finally got a call back from Digium who indicated that
> > > there is a fundamental conflict between the card and the PowerEdge
> > > having to do with PCI interrupts. Asterisk version is stable v1-0 12/29/04.
> >
> >That sounds a little hard to believe.
> 
>          I agree. Perhaps I have too much faith in Digium support. Does
>          anyone else disagree with Digium's assessement?
> 
> 
> > > The symptoms of the problem were as follows:
> > >
> > > 1. issue "modprobe zaptel" which immediately returns with no feedback
> > >
> > > 2. issue "modprobe wcfxo" which returns
> > >       init_module: No such device
> > >       Hint: isnmod errors can be caused by incorrect module parameters,
> > > including invalid IO or IRQ parameters
> > >
> > > 3. issue "modprobe wcfxs" which immediately returns with no feedback, 
> > however
> > > the four lights on the card go on and then the machine locks up 
> > completely,
> > > requiring
> > > a power cycle to get it running again. After the power cycle, if I look in
> > > /var/log/messages
> >
> >If you have a tdm04b, that says you have four fxo ports. Why are you
> >trying to load wcfxs?
> 
>          Actually, I tried "modprobe wctdm" which was supposed to load the
>          correct TDM driver and this resulted in the same behavior described
>          above (lights on, system locks.) In an attempt to figure out why the
>          system locked up I subsequently issued a "modprobe wcfxs" to
>          confirm that was causing the problem.
> 
> 
> > > I see a long cycle of the following messages before reboot:
> > >       kernel: Dazed and confused, but trying to continue
> > >       kernel: Do you have a strnage power saving mode enabled?
> > >       kernel: Uhhuh, NMI received for unknown reason 20 on CPU 0
> > >
> > > 4. if I cat /proc/interrupts, I don't see any entry for a wcfxo module.
> > >
> > > In any case, I did follow the setup instructions on the Digium site (make
> > > install in /usr/src/zaptel, edit /etc/zaptel.conf, edit
> > > /etc/asterisk/zapata.conf, etc.)
> > > and we currently have a X100P wcfxo card in another machine running well
> > > so we've already had experience getting a card working.
> > >
> > > If anyone has insight into what might be wrong, please do let me know.
> > > Ultimately, if I trust the Digium support information, then this card will
> > > never work, so I'd be grateful to hear about any other PCI card that 
> > provides
> > > four or so wcfxo interfaces that might work with the PowerEdge.
> >
> >I don't use Fedora, but it seems those that do have had problems
> >loading the drivers. Try the modprobe wcfxo then zaptel, then check
> >your /proc/interrupts. If that doesn't work, try modprobe zaptel only.
> >I think someone mentioned a readme in the src/zaptel directory for
> >Fedora as well. Might look.
> >
> 
>          Thanks for the advice. However, "modprobe zaptel" didn't
>          do anything (that I could tell) and "modprobe wcfxo" returned
>          the error. And, greping for Fedora in src/zaptel didn't turn up any
>          matches.
> 
> Michael Swan
> Neon Software, Inc.
> 
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