On Mon, Jan 13, 2020 at 5:46 PM Ed Greshko <ed.greshko@xxxxxxxxxxx> wrote:
>
> On 2020-01-14 06:01, Mauricio Tavares wrote:
> > So I want to add a few options to the kernel (say iommu support). I
> > have been told before to avoid using grub2-mkconfig because it would
> > apply the changes to all currently available (to boot from) boot
> > kernels. Instead, I should edit just the latest kernel entry in the
> > grub.cfg file, adding the option to the line starting with linux16.
> > This way, if it went boink, all I had to do is reboot, pick another
> > kernel from the grub menu and off I went. And, it seems that every
> > future kernel upgrade would incorporate this change.
> >
> > Is that accurate or is there a cleaner way to do the same while still
> > leaving me the option to go back to the grub menu?
> >
> Do you wish to try out some options without make a permanent change?
>
> Assuming your using Fedora Workstation, which unlike other spins, doesn't present the list of kernels to boot.
> You'd just hit the "escape" key when booting. Then you'd see the list of kernels. Hit "e" to edit. Go to the
> linux line, add the parameters and then Ctrl-x to continue the boot.
>
> Those changes are temporary.
>
> If all works as you'd like, then you could make them permanent.
>
Thank you for your reply but it seems I failed to properly
explain myself. I want to ensure my changes only affect the latest
kernel (and future kernels) as listed in the grub menu. I was not
aware there is a version of fedora which would not list available
kernels; if there is I would rather not use such version. The fedora
version I use does provide me with a proper grub menu hence me
describing that in the problem statement.
> --
> The key to getting good answers is to ask good questions.
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