rtapi -- uspace -- "Using POSIX non-realtime"

Hi Andy, Thaks for reply!

andypugh wrote: Are you sure that you have the same issue as this thread is discussing? /quote]

I'm a beginner and have this one:

"Failed to get reference clock time: Input/output error
Shutting down and cleaning up LinuxCNC...
task: 66304 cycles, min=0.000047, max=0.044388, avg=0.001064, 2 latency excursions (> 10x expected cycle time of 0.001000s)
Note: Using POSIX non-realtime
avc@avc:~/LinuxCncRip/scripts$ "

Did you compile the RT kernel yourself? (And, if so,. why?)/quote wrote:
Firstly I tried to install:

"LinuxCNC 2.8.0 Debian 10 Buster PREEMPT-RT ISO"
from the main page of download, but I had to install the headers and I wasn't able to find the headers for the kernel of this versión and installed the newer ones.

Did you compile linuxCNC yourself? (and, if so, why?)/quote wrote:
I'm trying to install EtherCAT Hal driver and a RIP installation is needed.

What does uname -a say?

avc@avc:~$ uname -a
Linux avc 4.19.0-14-rt-amd64 #1 SMP PREEMPT RT Debian 4.19.171-2 (2021-01-30) x86_64 GNU/Linux
avc@avc:~$

Thanks a lot!!

In that case it does sound like you forgot

./configure --with-realtime=uspace

Hi andy
I have found a text file with the terminal out from when I did it.
Itś more, I had to do several times due to other problems and the first ones I had to apply:

configure --with-realtime=uspace --enable-non-distributable=yes

Is it the Kernel right?

V-max

It is likely that the underlying problem is that you did "sudo make" so the ownership of you RIP install is wrong.

It should be

make
sudo make setuid

I would suggest cleaning up and trying again.

sudo make clean
make clean
./autogen.sh
./configure --with-realtime=uspace

Hi Andy

Done but...

During the first try to start Linuxcnc there is not Posix note.
I do chmod 777 to rtapi_app and appear again the Posix note.

Thanks.

seem you missed command "sudo make setuid" after make lcnc