New and Working RTAI debs for 2.9

Colleagues, I installed kernel 5.4.258-rtai-amd64 + LinuxCNC 2.9.4 (kernel 290 too). In all cases, the AXIS interface is launched only when you specify additional kernel options such as isolcpus=1 (I have two cores), etc. But it starts and shows good jitter.
However, the actual work does not last long, but is interrupted due to a constantly appearing error -
joint 1 following error(motor number may change).

Is this treatable?

There are lots of comments here abut running the 5.4.279 kernels, but I don't seem to be able to find them anywhere. Any clues?

The link in the first post of the thread says 5.4.279 but leads to 5.4.290 debs.

There is no point in looking for 279. Both versions of the same program start in the XYZ configuration and work normally. Both versions crash in the same way when working with XXYYZ.

abs32 wrote:

There is no point in looking for 279. Both versions of the same program start in the XYZ configuration and work normally. Both versions crash in the same way when working with XXYYZ.

This is a different question/issue. 

I was looking for the 279 kernel because I want to make a new 2.9.7 deb package (and possibly an ISO)

I am looking at your f-error and probe issues too, but I thought that a new package might be relatively easy. 

To get a specific kernel you probably need to get the source from kernel.org
www.kernel.org/pub/linux/kernel/v5.x/
Follow a similar process to the attachment but I assume you won't need to patch the real time kernel

Note this example compiles to a Deb file so you can build it on a fast PC and install with dpkg -i
 

rodw wrote:

To get a specific kernel you probably need to get the source from kernel.org
www.kernel.org/pub/linux/kernel/v5.x/
Follow a similar process to the attachment but I assume you won't need to patch the real time kernel

If I go that way I will, absolutely, need to patch the kernel. 
But this whole thread seems to say that there was a 5.4.279-rtai kernel that a number of people successfully tested. But which is now nowhere that I have looked. 

I have installed 5.4.290-rtai on a machine here, and it seems to work for me, and I have created a LinuxCNC / Trixie / RTAI package based on it, but I don't want to bake that into an ISO if it's known to be an unreliable kernel.