Mesa Card: "No 7I92 board found" using mesaflash

You can't assume the Ethernet will be named eth1

You need to run the ifconfig -a command to find the name of your Ethernet port
(or use the network manager wizard and set it up through the GUI)

The problem solved,

i updated the mesaflash to newest version (3.2.0). Previous I don update for newest version mistakenly.
Set ethernet module to eth0, programming the IP address 10.10.10.10. Flashed the firmware, and it works.
Thank again for helping.
Attila.

Hello,

I have another question. I use HP DC7800 pc, with Intel Core2Duo E6750, 4GB ram.
After a fresh "linuxcnc-2.7-wheezy.iso" install, the Latency Test result is max 35 000, that is good for LinuxCNC stepgen.
But to use Mesa 7i92 ethernet card I must install Preemp-RT kernel.
I make this according this description:

linuxcnc.org/docs/2.7/html/getting-start...th_preempt_rt_kernel

After this, the card works, but the Latency Test result is about 1 000 000.
After few seconds the error message appear, "7i92.... communication error".

How can I minimize the latency delay, or where i make a mistake with kernel install?

Best regarsd,
Attila.

1000000 ns (1 ms) latency is unusable

Probably a kernel or BIOS setup issue
I would first check that you have all power management options turned off in the BIOS
and that you have "idle=poll" in your kernel command line

Also try a 3.18 to 4.1.x Preempt-RT kernel (not newer than 4.1.x)

Heres a Preempt-RT latency plot of a DC7800 with a similar CPU

freeby.mesanet.com/dc7800-preemt-rt.png

and the same DC7800 with a better CPU:

freeby.mesanet.com/e8500-preemt-rt.png

Also make sure you are actually running the kernel you think you are (uname -a)

Once you fix the latency issue you must also turn of IRQ coalescing in the Ethernet driver
The DC7800 uses a Intel Ethernet chip and its driver does IRQ coalescing as default behavior
The option can be turned of with ethtool:

sudo ethtool -C your-ethernet-device-name rx-usecs 0

Thanks for quick answer, the problem solved.

I must in Grub boot menu to select a different kernel version, and with this, the Latency delay is around 16 000.
The card works, and no error messages.