LinuxCNC on Linux Mint 19.2

As a Linux beginner, I gained some experience with my Linux Mint 19.2 laptop and desktop. Hence I would like to build LinuxCNC on Linux Mint as well, following the detailed description in the 'Building LinuxCNC Uspace' document. I looked for the 19.2 versions of the rt components listed. Unfortunately I cannot find a 4.19.2 version of:

mirrors.edge.kernel.org/pub/linux/kernel...-4.19.1-rt3.patch.gz

Can I use this patch, is there one in another directory, or is for 19.2 no patch required? I could of course go back to 19.1 as initial installation, but would a subsequent upgrade to 19.2 still work?

Thanks, Elco.

It was my understanding you needed to select a version with a compatible PREMPT_RT patch

This might help for 19.1 gnipsel.com/linuxcnc/uspace/linuxmint19-rt.html

Thanks for the update. In the mean time, I wiped LM 19.2 and installed 19.1
I followed again the instructions in the document 'Linux Mint 19.1 RT kernel'
and managed this time to download the necessary files. After that I ran into the following problems:

The listed command 'tar -xpf linux-4.19.1.tar.xz' is incorrect. After some googling it fixed it by deleting the first - sign.

Building the kernel I got the following error messages:
"cannot use config-stack-validation=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel"
and 30 - 40 times:
"the frame size of <some_larger.number> is larger than 1024 bytes"
in lines starting with 'arch' or 'kernel'.

After which I gave up.

I'll install LM19.2 again and try this solution.

Thanks, Elco.

Well, I installed 19.2 again, and followed the 'easy installation' guidelines:

Downloaded linux-headers-4.16.12-rt5-kona-rt_amd64.deb and the same linux-image version.
Used grub2 to chose above kernel, booted successfully:
robert@lab-CNC:~$ uname -a
Linux lab-CNC 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

Installed with gdebi linuxcnc-uspace 2.8.0 ~pre 1.5212.g and the matching linux-doc-en.
Ran the latency test, for the base thread around 54000 (vs 40000 with 2.7.14 on the same hardware). So far so good.

Then I discovered that several of the LinuxCNC submenus (e.g Getting stated guide) did not open, but started gimp (??). The link and document location looked correct through. Running in the command window, this is the result:

robert@lab-CNC:~$ /usr/bin/see /usr/share/doc/linuxcnc/LinuxCNC_Getting_Started.pdf
(gimp-2.8:2627): GLib-GObject-WARNING **: 14:17:58.658: g_object_set_is_valid_property: object class 'GeglConfig' has no property named 'cache-size'

Any idea what is happening here?

Thanks, Elco

Elco, I am not a Linux Mint expert, but that looks like an error message coming from an application called 'gimp'. Gimp is the Photoshop of Unix. It's actually the original, open-source version on which Photoshop depends.

I don't think it's a serious issue. You might be able to fix it by uninstalling and reinstalling gimp.

In order to be able to read PDF documents, you need some sort of PDF viewer. Most browsers can open and view PDF documents. In this case, you could navigate to the file that the LinucCNC Getting Started Guide point to - /usr/bin/see /usr/share/doc/linuxcnc/LinuxCNC_Getting_Started.pdf - and then right-click on that document and select Open with Firefox (or whatever web browser you have installed).

Firefox might not be able to open it, depending on how you have it configured. If that happens, you can always open up Software Manager and search for "PDF". There should be a PDF viewer you can install. Once installed, right-click on that same document and select "open with..." When the dialog for choosing what app to use appears, select the PDF viewer app you just installed and then look for a checkbox telling Linux to open all documents of this type in this same way. Once you check that box, the menu link should work correctly.

I seemed to have succeeded in installing Mint 19.2

How do I use Builbot to get linuxcnc.

:~/Desktop$ uname -a
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

I get an error please see the screen shot below

what is the command from a terminal to install it