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I think many posts in this thread are completely unrelated to the topic I started it with.
My idea was to compare the performance of the Raspbian Bookworm (and not the Debian) on Pi4 and Pi5....

Andy tested this image for the Pi5 and found it worked ok except image colour depth was lacking.
drive.google.com/file/d/1H_q0Ra-27ZDOhqu...x1f/view?usp=sharing
This is just a variation of whats on the Downloads page for the 4b

linuxcnc.org/downloads/

There's a pre made image for the raspberry 4

Hello,

I'm sorry but I didn't understand, how to install in a simple way this last version of linuxcnc on raspberry pi4 with last version of the real time kernel .

can someone help me?

Thanks

No need for a base thread.

I'm new to LinuxCNC I've installed the canned 2.9.1 on an RPi 4 8GB and got it to ping the 7i76E.  Then I ran the Latensy Test page and I've attached a screen shot of the page after running for about 20 minutes with no additional load.  According to pages I've seen as far as latensy test is concern the numbers that RPi 4 latensy test show is not a good candidate for any serious stepping and micro-stepping.  Since I'm pairing the RPi 4 with a hardware step generator like the 7i76E, should I just ignore the latensy test?

Even from the original githubConfig Menu

• Review the userdata.txt file for further options: locales, timezone, nameserver(s) and extra wireless support
• 1 active | 0 inactive

Name: # Your name
Username: # Your username
Password: # Your password
Enable root: # Set root password to `toor`

Linux kernel
Branch: # Supported: 6.1.y and above
Build: # Kernel build version number
Menuconfig: # Kernel menuconfig
Compiler: # GNU Compiler Collection / Clang
Ccache: # Compiler cache

Distribution
Distro: # Supported: debian, devuan and ubuntu
Release: # Debian: bullseye, bookworm, testing, unstable and sid
# Devuan: chimaera, daedalus, excalibur, testing, unstable and ceres
# Ubuntu: focal, jammy, kinetic and lunar
NetworkManager # 1 networkmanager | 0 ifupdown

Customize
Defconfig: # User defconfig
Name: # Name of _defconfig (Must be placed in defconfig dir.)

User options
Verbosity: # Verbose
Devel Rootfs: # Developer rootfs tarball
Compress img: # Auto compress img > img.xz
User scripts: # Review the README in the files/userscripts directory
User service: # Create user during first boot (bypass the user information above)

started with

 

Had it on for a few hours now, seems to work! Throws an error about long delays but not enough to desync everything and everything keeps working without any noticeable problems.
Many thanks for the help once again!
...I might have pushed my prototype 3d-printed mounts a bit too hard...

cornholio wrote:

I can't remember is there an option to run menuconfig ?

Just found it......
MENUCONFIG="0" set this to 1 in userdata.txt and make the changes in menuconfig.

Not the same.
the installed image includes the command menu-config.
Confusing I know.

 
 

It was even easier than that. I needed to press spacebar when selecting en_US.. I had just highlighted it and pressed enter.
Now the changes pulled through and after a reboot I could finish PnCConf.
LinuxCNC has now been running stable for ~10 minutes which is a lot more than before.

I will leave it on for some hours and see if it continues behaving.

I can't remember is there an option to run menuconfig ?

Just found it......
MENUCONFIG="0" set this to 1 in userdata.txt and make the changes in menuconfig.

Doing a full reinstall with the image from rodw's link.
-Pi imager says it's written successfully and ejects card.
-Raspberry boots up nicely.
-I run 'sudo menu-config':
I set ip to 10.10.10.100 and I set gateway to 10.10.10.1
I change keyboard to swedish layout.
Timezone to stockholm
Locale to en-US.
Then quit the config and restart pi.

Timezone works, keyboard works and IP seems to work, I can ping the Mesa card.
PnCConf refuses to work because locale is unsupported.
I doublecheck locale in terminal with 'locale' and 'localectl'(I have no idea if there's a difference).

localectl says "System Locale: (unset)".
locale says everything is "C.UTF-8" except "language=" and "LC_ALL=" which are empty.

It seems to me that the locale setting in menu-config does not work?
I got around this previously with some command but can't find it again, so now I'm stuck at not being able to use PnCConf.

cornholio wrote:

When you build a kernel search for this string CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE . Should tell you where to go. I'd give a screen shot but my pies are away for the day.

Geez, Cornholio, my resident pi expert has let me down! 

This is all that we set
github.com/rodw-au/rpi-img-builder-lcnc/...rscripts/uscripts#L6
Please let me know how to script it.

When you build a kernel search for this string CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE . Should tell you where to go. I'd give a screen shot but my pies are away for the day.