LinuxCNC on Linux Mint 19.2

Thanks to all that responded.
I finally achieved to get linux mint with linuxcnc working. I wanted this to test it out on my Brix 1900 box with mint .

Linux cnc-GB-BXBT-1900 4.16.12-rt5-kona-rt #1 SMP PREEMPT RT Fri Jun 8 10:39:47 JST 2018 x86_64 x86_64 x86_64 GNU/Linux

The result were no different than this one :
Linux Brix 4.9.0-11-rt-amd64 #1 SMP PREEMPT RT Debian 4.9.189-3+deb9u1 (2019-09-20) x86_64 GNU/Linux

The problem with the Brix is that The steppers run very rough with using either of the above SSD's but when the same SSD is swapped to another PC everything is fine.

This is what I get with the latency test:-

cnc@Brix:~/Desktop$ latency-test
Note: Using POSIX realtime
Unexpected realtime delay on task 0 with period 25000
This Message will only display once per session.
Run the Latency Test and resolve before continuing.
Note: Using POSIX realtime

And Histogram:-


What would cause the realtime delay and is the histogram OK?

Are you sure you have CPU speed switching and any C states higher than C1
turned off in the Brix's BIOS setup?

PCW wrote:

Are you sure you have CPU speed switching and any C states higher than C1
turned off in the Brix's BIOS setup?

Thanks Peter.
I have turned off everything I can find


I have all tested it on another mill with a Mesa 7i96 in it. Using the same SSD The motors run fine when inserted in another PC but they run rough when the same SSD is put into the Brix PC

tommylight wrote:

lscpu ???

Is this what you are asking;-
cnc@Brix:~/Desktop$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 4
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 55
Model name: Intel(R) Celeron(R) CPU U1900 @ 1.99GHz
Stepping: 9
CPU MHz: 1920.703
CPU max MHz: 1920.0000
CPU min MHz: 1280.0000
BogoMIPS: 3840.00
Virtualization: VT-x
L1d cache: 24K
L1i cache: 32K
L2 cache: 1024K
NUMA node0 CPU(s): 0-3
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer rdrand lahf_lm 3dnowprefetch kaiser tpr_shadow vnmi flexpriority ept vpid tsc_adjust smep erms dtherm arat

Thanks for the comments, and the solution.
In the Linux Mint menu, the LinuxCNC documents are called like:
/usr/bin/see /usr/share/doc/linuxcnc/LinuxCNC_integrator.pdf

But in Linux Mint, 'see' does not follow the default setting for *.pdf
and opens gimp ('see' has its own defaults). So setting the default did not help.

Replacing this with
/usr/bin/xreader /usr/share/doc/linuxcnc/LinuxCNC_integrator.pdf
solved the problem.