[Asterisk-Users] TDM04B lock up

[Rich Adamson]

> I have a strange situation. Once in a while (non-deterministic) the 2 TDM04B
> cards lock up at the same time and stop processing incoming and outgoing
> calls even though * shows that it is trying to communicate to ZAP channels
> (at least on the outgoing). The only cure is to reboot the system when it
> happens. It makes me very apprehensive of the system
> 
> Has anyone seen this problem. Could this be something to do with the IRQ
> sharing. Here is the output of lspci -v.
> 
> I see that one of the cards shares IRQ # with VGA controller and the other
> one with ICH4 IDE.
> 
> Any help would be appreciated.

The TDM04b card is known to do that and its been reported to digium by
several users. Seems to lock up about once every week or two, and varies
from one system to another.

The digium folks aren't saying anything as yet about what needs to be
fixed. But, best open a trouble ticket with them for the records.
There is a very high probability it is a hardware design issue.

I've added a capacitor to my card under the assumption that noisy
on-card logic is distrubing the chipsets. So far I'm not had a lockup,
but it's a little to early to say that actually fixed it.

irq sharing has been known to be an issue in some cases, however its
generally over-blown on this list. If you want to eliminate that as
an issue, either move you cards around to different slots or take a
look in your bios config to disable those irq's on in use (or both).
I'd guess the probability of an irq issue causing your problems is
in the neighborhood of about a 20% chance.