Definitive guide to installing MX Linux, Probe Basic and LinuxCNC 2.9

One more difference that I found is that in LinuxCNC help the configure step is run adding the parameter:

--with-realtime=uspace

That might explain the error and be more correct anyway. I'll add to the guide once I get the formatting sorted out.

spi wrote:

I also see the same error with realtime delay on task 0. Unclear why that would be.
 

Have you tried running a machine or the latency tests while getting the error?  I am reluctant to just ignore it, as I suspect it's something to do with this MX21/LCNC2.9/qtpyvcp/probe basic installation.  I never had a latency error after under 2.8 and the older versions of qtpyvcp and probe basic.

What kinds of results your latency test gives?

~/linuxcnc-dev/scripts/latency-test

My newest box is not giving the error anymore after configuring linuxcnc with the --with-realtime=uspace option.

I don't remember the exact number, but latency was 'acceptable' for a Mesa card setup if my interpretation of the various latency discussions is accurate.

I'd like to try the lcnc configuration you've mentioned.  Do I just start LCNC with "--with-realtime=uspace", or is there something else I have to install/modify?

Please check my updated guide but basically you need to do this:

cd ~/linuxcnc-dev/src
./autogen.sh
./configure --with-realtime=uspace
make
sudo make setuid

Thanks for the clarification.

Would you suggest uninstalling LCNC, qtpyvcp, and PB before re-installing LCNC with the new --with-realtime=uspace option?

Or should I just re-run everything (or some part) from your guide and what needs to be overwritten will take care of itself?