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Typically with a RPI4 you need to

set the force_turbo option true (in config.txt)
set isolcpus to 2,3 (in cmdline.txt)

You may also need to lower the servo thread
period to 2ms  (2000000)

i am using ethernet and mesa 7i96s   

It's going to help if you can describe your system, are you using ethernet, SPI or gpios (software steeping). Mesa, remora or other hardware.

Your HAl & INI files will help as well.

Yes I did 

Hi, I'd like to ask how to run LinuxCNC on a system with Xenomai 4  installed (Debian 12).
I installed LinuxCNC usingwhich is how I did it on a Debian 12 system with the preempt-rt patch, and it worked fine there. However, now with Xenomai 4, when I try to run LinuxCNC, it gives me a note: "Note: Using POSIX non-realtime". Does this mean I'm not leveraging Xenomai's real-time performance?
I'm sure my Xenomai installation was successful.
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Since there are few tutorials for Xenomai 4, I'm not sure what the correct steps are. My current guess is that I need to run it in the evl environment, which means I need to run it in root mode (sudo su). However, when I tried that, LinuxCNC gave me an error and didn't allow running in root mode.
So, I'm wondering if there's a way to solve this problem, or if there are any parameter settings that can make LinuxCNC run in the real-time core of Xenomai 4.
How can I run an application using the EVL core?
Thanks a lot!

I mention the gifs modules during development of the image but rod was reluctant to include them.
The ssh thing is a bit weird I thought rod included that, I was working in tandem with rod when the image was being developed, we differed on what should be included in the image.
As for vnc, this is the first time this issue has arisen, so ATM it seems to be a one off.
The only alternative to enable/disable hardware is to edit the config.txt by hand.
I don’t think you’ll get a lot of movement until a newer version is released.
But one thing you could do is mentioned these things on the github page, as that where the devs are, or make a pull request with the info you think should be included in the docs.
Remember projects like this only move forward by users putting in the effort.
Another thing to do is raise an issue on rods github for the image builder, the link is somewhere in the thread, and mention these items.

Excellent work guys, thank you.

After playing with RpiD12B for awhile, here are some notes:
* SSH was not included. Simple, tiny. sudo apt install ssh. But required attaching physical keyboard to Rpi (assuming many are using touch.)
* The file manager advanced settings tab complains of no GVFS (Gnome Virtual File System) support, for features like the trash can. To enable that,
sudo apt install gvfs-backends gvfs-fuse # uses 53MB disk space
* The `menu_config` of Debian 12 is very different from the `raspi-config` of Raspbian. No longer easy for some to disable, say, sound / bluetooth / wi-fi. A small readme of alternatives could make it more approachable. Lots of questions here for "where is config.txt", etc.
* NoMachine and TigerVNC do not want to work on this iso. x11vnc will, see forum.linuxcnc.org/9-installing-linuxcnc...rvnc?start=10#298430 Could include x11vnc and the service, and leave it disabled. Then the user just enables the service for vnc support. Also noted in the readme, so that fools like I don't waste days struggling with NoMachine and TigerVNC first.

That indicates a real time issue on the RPI

Have you run a latency test?

i am running linuxcnc on raspberrypi 4, and sometimes this error message is shown
 

My setup will be a little more difficult, then usual.
13 stepgens 9 encoder (7i76e + 2x7i85s + 7i73)
But I'm still trying to figure out thigs about OS...

No there is no driver, Linux is not Windows and the RPi is a completely different architecture.

As for copying settings I'd just start from scratch, it's going to be easier.

I don't know why nothing has changed. Maybe if you go to the github page and raise this issue, I've tried with RPi5 SPI issue but have had no one make a reply.

In reality unless you need a something the size of the RPi you would get better bang for buck with a x86 system that has 2 spare PCIe slots for 2 Parallel Port cards to get about the same IO.
I got fed up with my RPi5 and added a EPP interface to the FPGA card I made and used that with a small ITX board.

elovalvo wrote:

xenon-alien wrote:

Are you telling me that I need to start all settings again with a new image file?
Or there is a video driver, I can use for this image I already have? (Image from the LCNC downlods category)

In my opinion, you should use this image that Linuxcnc already has, and copy the configurations you're already using.

The ability to change the resolution and orientation is already available in the tools available on the desktop.

If I saw correctly, on your image the LCNC not the stable version.
How can I copy the system settings I have made? (not LCNC cofigs)
So, really, is there no video driver to install and solve the problem? (easy way, like in windows - uninstall the old, install the new and set it as needed)

Not really understand, why is in the downloads an image with a lot of "issues" and no mentions about it...
In most cases, at first, people trying the image and if there some problems, try to solve it an go to the forum.
This issues was known in January. Newbie people spending days and weeks in nowhere...

What tools are they ?

I could never work out how to do it. This was the biggest issue I had when I was testing rod's images. Using a HDMI to DVI converter had resolution stuck at 600x480. Starting with the RaspiOS image and adding the RT kernel gave no issues, had full control of resolution.
One thing that should be added to the docs is the location of the config files and a mention that the RPi5 is not compatible with SPI due to the hardware changes to the RPi5 rather than stating that it is.

xenon-alien wrote:

Are you telling me that I need to start all settings again with a new image file?
Or there is a video driver, I can use for this image I already have? (Image from the LCNC downlods category)

In my opinion, you should use this image that Linuxcnc already has, and copy the configurations you're already using.

The ability to change the resolution and orientation is already available in the tools available on the desktop.

Yeah start again.