Fixing the default realtime module

In my attempt to sort out my smi issue I've realised I've broken the default GNU GRUB entry (1st and 2nd line) " Debian GNU/Linux, with Linux 4.19.195-rtai-amd64 and also the associated "recovery mode" all of the other 3 versions below that in the image are fine, so is it easier just to remove that bad entry or try and fix it?

 

Feel as though I'm getting somewhere though, steep learning curve though for this linux virgin any advice welcome.

Cheers

Rich

Following this article seems to have fixed this issue, so now back to trying to fix my smi problem

linuxcnc.org/docs/2.8/html/getting-start...#cha:Installing-RTAI

Cheers all

First and second kernels (same kernel two entries, one is safe mode) is the RTAI version, the rest are RT-PREEMPT versions.
On older PC's the first is better regarding latency, on new ones both should work.
RTAI kernel = parallel port, Mesa PCI and PCI-E
RT-PREEMPT kernel = Mesa PCI and PCI-E and ETH.

tommylight wrote:

First and second kernels (same kernel two entries, one is safe mode) is the RTAI version, the rest are RT-PREEMPT versions.
On older PC's the first is better regarding latency, on new ones both should work.
RTAI kernel = parallel port, Mesa PCI and PCI-E
RT-PREEMPT kernel = Mesa PCI and PCI-E and ETH.
 

Rt-Premempt can be used with a parallel port to.  (It just usually isn't because most older PCs that have a parallel port get crappy latency with it.)

Todd Zuercher wrote:

 
Rt-Premempt can be used with a parallel port to.  (It just usually isn't because most older PCs that have a parallel port get crappy latency with it.)

Yes it can, but avoiding it for new users so they do not bump head first on "LinuxCNC wall".

You can install Grub-Customizer and select which entry becomes the default entry.
Grub-customizer is available in debian 10 and 11 but plenty of articles how to install it if its not in your distro.