Error after running the PnCConf Wizard

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26 Apr 2026 16:11 #345945 by antonyvm
Error after running the PnCConf Wizard was created by antonyvm
 

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File Name: linuxcnc.txt
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File Attachment:

File Name: linuxcnc.txt
File Size:6 KB


Hello All,
I have an error after trying to set up a 7i76E with a Asus Essential 14 N150 NUC.
Running the latest Debian and installed Linux CNC as instructed by Mr Rod on his youtube video.
All the installation went smoothly, but i am facing this error during my connection to the card.This is my second install, I have previously set up a 7i96S system and is succesfully running.
I am running a 12V smps for the 7i76E board, could that could be a problem.I think I might have missed something here.Please find the error report attached.
Thank you,

Antony. 
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26 Apr 2026 16:37 #345947 by PCW
Replied by PCW on topic Error after running the PnCConf Wizard
This sounds like a LinuxCNC installation issue:

iopl() failed: Operation not permitted

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26 Apr 2026 17:24 #345948 by antonyvm
Replied by antonyvm on topic Error after running the PnCConf Wizard
I am still getting pings from the card.
But the delay is sometimes high.

I thing the network driver might be mixed up?
This PC has realtek 8125 Ethernet chip.

How do we check if there is any conflict between the drivers?

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26 Apr 2026 17:43 #345949 by PCW
Replied by PCW on topic Error after running the PnCConf Wizard
This:

iopl() failed: Operation not permitted

Must be fixed before proceeding.

You can ping without root privileges but The hm2_eth driver
must block other programs access to the interface and this
requires root privileges.

This is most likely a LinuxCNC install issue or perhaps a BIOS security
setup issue (secure boot etc)

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26 Apr 2026 19:08 #345952 by rodw
Replied by rodw on topic Error after running the PnCConf Wizard
iopl() failed: Operation not permitted
cannot gain I/O privileges - forgot 'sudo make setuid' or using secure boot? -parallel port access is not allowed

Disable secure boot  in your BIOS.
I had this issue recently. I thought I had done this to this machine ages ago but, I found it was hard to make the change stick. Eventually got it. I found the numeric keypad is not enabled in the BIOS and used the top row.

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