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the CPU is a xenon 5650

It’s the same situation for me; I solved it by switching to an AMD "display-only" card.

MOBO do not have integrated graphic since 915 chipset i think, CPU's do have sometimes and more and more lately.

oh, that explains it i guess. And no, MOBO does not have integrated graphics. guess im buying another graphics card

AMD graphic cards do not work with new RT kernels, 4.19 is the last one that worked.
Does the CPU have an integrated graphic?
Intel works fine with RT kernel, NVIDIA works but causes issues so is unusable, AMD goes to black screen, al this with 6.13 RT kernel.
Had no time to test the 7.nn kernels yet.

Sorry guys my bad, i apparently forgot to update the md5sum when i uploaded the new version.
Corrected and updated, thank you.
P.S.
I just downloaded fro google and checked the md5sum against the original in my NAS, md5sum checks fine for both as
512b3e5226cb71127215bcf65c6a9b46

1. try other pins, looks like you are on two of the HDMI pins (there are filters on the board)
2. set an inverter/modifier to the step pin: (Pins -> Step -> Modifier + -> invert)
3. check that Pulse_LEN and Dir_Delay set to default (4.0 / 0.7)


I have several machines running on this, and there are a few other users as well, all with different drivers and motors; so far, it’s always worked.

EDIT: what is on the breadboard ?

EDIT2: I’ve gone ahead and ordered one of those DM542s just to be on the safe side,
it’s due to arrive on Tuesday or Wednesday

systemctl get-default

it reply's with graphical.target

oh, by the way, im using inductive switches.

I was thinking the same thing about if it was "normal" I would have been able to find those posts. So i just assumed maybe I just didnt set something up right yet (like the slow parameter you mentioned, Ill give that a try). thanx

I tested with the Branches dev from GitHub and the Tang Nano 9k, but the motor still couldn't return to the zero position after stopping. You must use the same DM542 stepper motor driver to reproduce this problem.

 
 
 
 
 

glxgears runs fine from a terminal. i was using a couple Nvida cards early on, but they had other issuse with scrambling the screen. so I was told an AMD card is prefered for Linuxcnc anyway, because the proper drivers are baked in. Thats why i got that amazon one.
I'll try and download the ISO again and use a different USB. but i cant for the life of me find anything about secure boot in my bios.

rubes@x3cnc:~$ sudo dmesg | grep gpu
[sudo] password for rubes:
[ 3.922158] [drm] GART: num cpu pages 524288, num gpu pages 524288
[ 3.948192] radeon 0000:03:00.0: fence driver on ring 0 use gpu addr 0x0000000100000c00
[ 3.948194] radeon 0000:03:00.0: fence driver on ring 1 use gpu addr 0x0000000100000c04
[ 3.948196] radeon 0000:03:00.0: fence driver on ring 2 use gpu addr 0x0000000100000c08
[ 3.948197] radeon 0000:03:00.0: fence driver on ring 3 use gpu addr 0x0000000100000c0c
[ 3.948198] radeon 0000:03:00.0: fence driver on ring 4 use gpu addr 0x0000000100000c10
[ 3.948609] radeon 0000:03:00.0: fence driver on ring 5 use gpu addr 0x0000000000075a18
[ 3.968652] radeon 0000:03:00.0: fence driver on ring 6 use gpu addr 0x0000000100000c18
[ 3.968654] radeon 0000:03:00.0: fence driver on ring 7 use gpu addr 0x0000000100000c1c
[ 11.149261] amdgpu: Virtual CRAT table created for CPU
[ 11.149286] amdgpu: Topology: Add CPU node
rubes@x3cnc:~$

I wouldnt begin to know how to decipher that.

Shared home/limit switches are pretty common so I would expect more
complaints about this if this always happened.

I wonder if this is possibly  caused by contact bounce.

Have you set the switch input inm pins to "slow" ?

that was what I understood to be the case...but it isnt!!! ive done .1" to 1" offsets in both positive and negative. it dont matter. all that does is change the final parking position of home.
The hard stop tripped status shows up instantly when the axis hits the switch initially.
this is just a visual annoyance at this time so ill deal with it the way it is.

I tried this method (but did RIP instead):

forum.linuxcnc.org/9-installing-linuxcnc...th-preempt-rt-kernel

and the latency was horrid. The thread is from Dec 2022 thought it seems, so maybe there is a better way?

The latency isn't very good on the 2.9.8 image from the downloads page either, but not as bad as it was following the above guide. Maybe that's to be expected?

Everything just feels sluggish, and "jerky".