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Well, I built the stock 6.13-rc6-rt3 with RT patches from kernel.org and it does not create /sys/kernel/realtime

Hello
Im pretty sure my new computer is corrupt when i pickup a new one ill implement the fixes you suggested.

Cant do this anymore bye all wrote:

Hence the last version of Windows I used was Vista. Linux all the way for me.

Whats Windows?
If I have to go out of my browser on Windows, I truly can barely remember what to do...

rodw wrote:

PCW wrote:

I did, I built 6.13-rc6-rt3 from kernel.org with the RT patches applied
but roykas patch was still needed.
Sounds like the issue is linuxCNC's method of detecting a RT kernel. Maybe we need to raise an issue and find a better way  at the source rather than Roykas work around.
 

I've seen the sys_fs patch in the kernel rt patchset. Name is sysfs__Add__sys_kernel_realtime_entry.patch

Sounds like its an error with your direction wiring. PLease chaeck it and confirm all connections are solid.

I just used the sys_fs patch for realtime, that's all that is really required.

What I've notice with the patch set you end up having to set low_latency_desktop within the context of the preempt menu and then full preempt that shows up in the main section of general setup.

Without the patch set all the fully preempt option is in the preempt section under general along with the others as per previous kernel versions.

This happens whether building an arm kernel or a x86_64 kernel.

I went thru this royka during the course of quite a few posts. The guy's right on the money.

PCW wrote:

I did, I built 6.13-rc6-rt3 from kernel.org with the RT patches applied
but roykas patch was still needed.

Sounds like the issue is linuxCNC's method of detecting a RT kernel. Maybe we need to raise an issue and find a better way  at the source rather than Roykas work around.

I didnt mean to come out punching im just frustrated there is alot to take in. I finally had some progress using an old dell pc pulled out of the garage. got it to load and booted to live install. The issue im having now is during setup of steppers when i go into tune the steppers only go in one direction. the stepper just wiggles a little ccw. cw it spins right up.the steppers are new i tried 2 of them same results. On the display it shows it spinning up to speed no errors but motor just sits there.

There can be isuse getting going on newer versions of Linux. This document covers all of the gotchas I know about.
docs.google.com/document/d/1S0K-UBlXnsYC...b_0/edit?usp=sharing
Install the latest 2.9.4 version from the downloads page (released this week) and Follow the relevant sections in this doc once its installed.

I did, I built 6.13-rc6-rt3 from kernel.org with the RT patches applied
but roykas patch was still needed.

How do I know it was needed? I stupidly thought I could create /sys/kernel/realtime
like normal file so for experimenting I did not need the patch. So I built the kernel
with the RT patch but not roykas patch first, and it failed in the expected
(POSIX non-realtime) way...
 

Not to mention thanks to Cornholio for building the rpi images and including his special features. And installing  the 6.12 rpi kernel to get the most out of the rpi5

there is always the THCAD2. You might be able to use a MUX2 to swap the inputs