Dell Optiplex 3010 can't get PCI Parallel Port Card working

Hi Forum,

I just found an old PC which has better Latency as my current LinuxCNC machine. I am using soft stepping. However, I can not get the machine working with my PCI Express Parallel Port Card.

The weird things starts already in the bios. Only in Slot 4 the Bios sees the Parallel Port Card. The card works for sure. When i put the card in the old computer it works, just the address is different.

Every now and then it works and starts to home the first joint, but stops once this is homed.

I noticed that the Card get's disabled, and I have to enable it manually after the first Linuxcnc start. But this will not make it work.
Only a fresh restart works and that only sometimes. When it ran I had an error joint following or so.

I also notice that there is a delay in the GUI when I disable the machine. It looks like frozen for a second.

 

When the machine runs, and does the homing cycle it feels like it loses steps. It does not sound like it runs smooth, if that make sense. Then it endes with join 1 following error.
 

I was irritated by that message too. But I am not sure where that message comes from. Attached are the comparison between the old (AMD high latency, but working fine) and the new PC (intel low latency but nothing than problems). This was all taken under high load.

All the settings you mentioned in the bios are already disabled. Sensors I have not watched.

Temperatures are below 50deg C. But the machine is showing it would move, but it doesn't. I have to completely shutdown and restart, then maybe it is working.

Perhaps the parport_pc module is loaded?
If it's PCIe you could try to disable the active state power management with the kernel parameter: pcie_aspm=off
Otherwise you could try another kernel, this is 6.10:
drive.google.com/drive/folders/1L28lG0zD...2XQJx?usp=drive_link

intermitent problem! try pulling and pushing the card into the pci slot few time to try to get a good contact, the pci copper fingers get oxidised after few years unused.