Upgraded to 2.7.13 -- W T F --

PCW wrote:
This might be a power issue on the 7I76E (if power drops out and it resets, this will happen)

Could a fairly big CAP on the PSU 24VDC output smooth out, if so how many µF?

WIFI is _not_ disabled unless you specifically turn it off (it will spend its time searching for WIFI signals if not disabled)

I would


1. Remove the isolcpus statement from grub and run update-grub
2. Reboot
3. Disable WIFI
4. Try LinuxCNC again


The 7I76E takes very little 24V power so I was more thinking of a bad connection (24V with 5V of ripple would run the 7I76E fine)

PCW wrote: WIFI is _not_ disabled unless you specifically turn it off (it will spend its time searching for WIFI signals if not disabled)

I would


1. Remove the isolcpus statement from grub and run update-grub
2. Reboot
3. Disable WIFI
4. Try LinuxCNC again

Turn it off as in BIOS or OS? Now off in OS Mint 18.3 low right corner only Wire is enabled. Is that OK or not?

Will try what you say above tomorrow as it is bedtime here now.

This is in grub now so only isolcpus=2,3 to be excluded right?
isolcpus=2,3 intel_idle.max_cstate=1 i915.enable_rc6=0 i915.enable_dc=0

I have not been right back through this thread, but if this is a USFF pc or similar using a thumbnail sized Wifi card, I would remove the Wifi card totally and use a USB wifi. That worked for me. Latency with Wifi was 10-20x worse.

I really hope that it is not that bad, but if nothing else helps I have to go that way.

PCW wrote: WIFI is _not_ disabled unless you specifically turn it off (it will spend its time searching for WIFI signals if not disabled)

I would


1. Remove the isolcpus statement from grub and run update-grub
2. Reboot
3. Disable WIFI
4. Try LinuxCNC again


The 7I76E takes very little 24V power so I was more thinking of a bad connection (24V with 5V of ripple would run the 7I76E fine)

The latency tests are sporadically good in that I get no freezing! Starting test is OK but adding GLXGEARS freeze's the PC.
No errors in LCNC what I have noticed so far, but something is very wrong as PC freeze´s in Latency test.

Bios is clear no power saving mumbo jambo, WiFi is disabled but still physically connected.

I'm inclined to go back with isolcpu's as that setting gave me no FREEZE.

So any more test I can do to find this bugging problem, I am all ears