Getting Trixie to play nice

HI
I have just updated the hardware and the software running a 4-axis router to LCNC on Trixie. However, I am unable to stop the screen from going blank and, more annoyingly, when I run a program, the machine randomly stops moving partway through the job, and I have to press the stop button on the screen, click on the last line of code it ran, and then click 'run from here'.  When this happens, the screen is still active, but I am wondering if these two issues are related.
Can anybody offer a solution?
Thanks Everybody

You should be able to disable the screen saver under power settings and/or Display but it has got more difficult
In my ISO, I had to go to great lengths to force this modifying xfce config files but its not in a format to share as a script as its in the live build environment
 

aaron wrote:

I am unable to stop the screen from going blank and

In Trixie you have to disable power manager and screensaver in startup options (Main menu -> settings -> session and startup) and add the line bellow to ~/.bashrc