07-22-2011 04:03 PM
As the PCI-MXI-2 Universal card is discontinued and is no longer available, so we purchased one PCI-MXI-2 card (Part Number: 777185-01) recently. We are still using the NI-VXI software for Linux (NI-VXI 2.1.0), so we installed the NI-VXI software on Red Hat MRG Realtime 1.2 (kernel 220.127.116.11-139.el5rt), every time the vximod module is loaded, the system freezes. Then I replaced the PCI-MXI-2 card with a PCI-MXI-2 universal card (Part Number: 778580-01) which we purchased a few years ago from NI, with this universal card installed, everything is working fine, the system does not freeze at all. But the PCI-MXI-2 card can work on a very old machine which is our development system and it is running kernel 2.6.16.
My question is why the PCI-MXI-2 card with the NI-VXI 2.1.0 freezes the Linux system 18.104.22.168-139.el5rt, and the PCI-MXI-2 universal card does not? Is there a way to resolve the problem?
08-04-2011 03:30 PM
I just wanted to let you know I'm looking into this. To clarify, the new PCI-MXI-2 card works on the older system?
08-04-2011 04:05 PM
Yes, the PCI-MXI-2 card does work on an older system which is a Dell PowerEdge 2950, and is running the kernel 2.6.19-rt and using the same NI-VXI 2.1.0.
08-05-2011 11:21 AM
In a system that fully meets PCI spec and provides the corresponding 5V or 3.3V power (depending on the card and slot type), these two versions of the MXI-2 board should be functionally equivalent. Given that the universal board does work in your system and provides a working solution, my recommendation would be to purchase the universal cards for any applications that you have for this system set-up moving forward.
Hope this helps,
08-05-2011 11:28 AM
Yes, you are right. But the problem is that NI had discontinued the universal PCI-MXI-2 card and is not available now. The only choice we have is to purchase the 5V non-universal PCI-MXI-2 card.