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For those who want to use the Raspberry Pi 5 with RaspiOS 64bit containing PREEMPT_RT, an image is available at this link: drive.google.com/file/d/16kKamxMKPdYAeJp...KLf/view?usp=sharing

On this image you can easily install a version of LinuxCNC with the installer script
www.linuxcnc.org/linuxcnc-install.sh
or by downloading the latest version 2.9.1 .deb packages from here
ftp.debian.org/debian/pool/main/l/linuxcnc/?C=M;O=D
Unfortunately, packages for bookworm and arm64 are not available at buildbot.linuxcnc.org/.

Finally you can create the latest version of LinuxCNC as reported here:
linuxcnc.org/docs/devel/html/code/building-linuxcnc.html

This is indeed a problem, i think if Joco test this on his machine he can get a following error.

velocity end=0

velocity end=1, here you see a vel-cmd jump.

New here.... my Pi4 1GB (yes, it exists! ) isn't good enough, my Pi5 4GB will be here soon. I'll test your images!

Any work around? Switching to a x86 computer?

doesn't non-zero end velocity lead to infinite jerks?

Hi,

Github is updates.
Joco, enable ve by setting the hal pin.

I thought to blend the rapids. I think this makes some sence.
 

Thanks Rod, you pointed me in the right direction and there was an easy fix here . Sorry I don't have Pi 5 yet to test your image.

The method is buried in comments in a commit or issue  in linuxcnc's git

I'll wait patiently for my image to be tested. .....

Debian has some info here.

wiki.debian.org/Wayland#Xwayland

Or if you start with raspios lite (no desktop) and install xfce as the desktop enviroment.

or.. as per help.realvnc.com/hc/en-us/articles/14110...-and-RealVNC-Connect
Raspberry Pi 4-5: This device defaults to using Wayland (wayfire) on Pi OS Bookworm, however it is possible to switch to X11 by using the command line raspi-config utility, under Advanced Options -> Wayland. Our initial testing indicates that RealVNC Connect functions as expected in this mode.

The reason all of my images and ISO's run XFCE is that it is an X11 environment. There is a way  to tell Wayland how to deal with X11 via an environment variable but I can't remember how.

I have no idea if this will work or not, but could you please try this Pi5 image I have just built using the same  environment as we used for the official  pi4b image on the Linuxcnc downloads page. It uses XFCE.
drive.google.com/file/d/1H_q0Ra-27ZDOhqu.../view?usp=drive_link

The other problem child I have encounted in the past was VTK was  missing in the Raspberry repos but I see now it is available in Debian. It was a 5 hour compile on a pi4b. (Maybe that was for QTPYVCP who don't offer pi packages in their repo.)

Seems like some GladeVCP widgets are not working on Bookworm yet as Wayland is used instead of X11. Gremlin is throwing errors and some others like Actions are not able to initiate.  

Gremlin, none of the HAL Actions and some others are not available in the Glade widgets list.

Has anybody else encountered some issues with the GladeVCP widgets as well?

Piet

Yes push it please Grotius. We all want to see it on real hardware.  
MAybe you will have to place an embargo on JoCo until you get it on your table 

Yes, I get that error too on my older Pi  4b
Lots of others have it working for them.. Just hardware I think

Hi!

Just some regular CNCer, already proficient with my rpi4 8gb and 2.8.  I thought I might try something else, test some stuff.  Been reading around here for some days now.  I tried to run that image (the one from Rod's first post):

rpi-4-debian-bookworm-6.1.54-rt15-arm64-ext4-2023-10-21-1847.img

but it gave me that screen (see attached file).  Seems to be hardware related...

Update to above, rt kernel built & running. Happy with basic latency test, have sound, BT & wifi disabled. Haven't really pushed it nor isolated any cores. Board is 4GB as new stock of 8GB had no ETA.