Question regarding kernel update in a dual boot configuration

I am dual booting Manjaro and MX Linux 19.

MX is in control of grub.

My question is suppose I get a kernel upgrade in Manjaro should I run

update-grub

in MX to add the new Manjaro kernel to grub menu ?

My distro's kernel is always called "vmlinuz-linux" no matter the version. Others use a symlink to the current kernel version, also called "vmlinuz" or some such.
In that case, no update necessary.

i had to do exactly as you are suggesting when i had void installed and bodhi (ubuntu lts based) was in control of grub. void handled the kernel upgrade in such a way that booting into the old grub entry didn't work so i needed to boot into bodhi and run the grub update. with other distros (mint and ubuntu mate), i could still boot into older kernels but needed the grub update if i wanted to boot into the most recent upgrade.

you should be able to test if this is necessary by choosing the advanced boot option for manjaro to see if the new kernel is listed before updating grub in mx.

Short answer is in general "yes".

Understood. Thanks for the replies.

Originally Posted by hifi100 MX is in control of grub.

Only if Manjaro hasn't (also) done a grub-install when it did the kernel update. It may, intermittently, and indeterminately. If it did you will need to boot into MX and do the grub-install as well as the update-grub.

Should have mentioned this possibility earlier.