You know there is “manjaro linux” (which is like “default”) and “advance option for manjaro linux” (which we can choose which kernel we wants to boot up with )
The question is:
Is there way to change default boot up kernel if i have installed 3 kernels ?
I know that the 2 “default” in grub , “/etc/default/grub”
will tell grub to remember my previous booted kernel.
But that doesn’t make “manjaro linux” (which is like “default” in grub menu) to become other kernel …
For example, i began by kernel : linux512
hence the “manjaro linux” in grub is pointing to linux512
how to make it pointing to other linux kernel that i have installed ? like 5.10 and 5.4 ?
Is it removing linux512 is the only way ? even though, after remove linux512, which kernel will take place of "manjaro linux " ?
I know that. right now i have 3 kernels installed. 5.4, 5.10, 5.12 (EOL).
during boot up, i choose the grub option “manjaro linux” instead of advance, it boots up with 5.12.
But since 5.12 is out of support, i am lazy to remove it. i just want to change to 5.10 without needed to click into “advance menu” to select 5.10 every time boot up.
But if you select the other kernel, that’s the one that is going to be booted the next time (because of the GRUB_DEFAULT=saved)
If you want to get rid of kernel 5.12, boot with 5.10, remove kernel 5.12 with sudo pacman -Rc linux512 and execute sudo update-grub (just in case, the remove of kernel 5.12 should already have triggered that). With this you can get that the “Manjaro Linux” entry is kernel 5.10
You mean if i have ( GRUB_DEFAULT=saved) , then when i booted with 5.10, then in the future (as long as i don’t select to boot up with other kernel) it will always auto start with 5.10 ?
I double confirmed it with you , because i think i did that, but it still boot up default with 5.12…
yap! exactly as i said. I just rebooted my laptop 3 times in a row… 1st time it booted up with 5.12 (when before i reboot it, it was 5.10).
then to be sure, i rebooted again… and choose “advance” > 5.10… booted up. and confirmed with uname -r
reboot again , at grub menu ; instead waiting 5 second time out, i just click on “manjaro linux” and it booted up. checked with uname -r, it is 5.12…
so, is it if i let it auto time out at grub it will boot up with my previous booted kernel … but when i click on “manjaro linux” (at grub menu) it will leads me to 5.12 ?? i have no idea…
So, if i uninstall kernel 5.12, which kernel will replace the grub menu "manjaro linux " ?
how is it decided which to replace “manjaro linux” of grub menu ? because i have got 5.4, 5.10 and 5.12 kernels installed
Otherwise, the following command will install a new kernel (3.13) to replace the existing kernel, **which will be deleted**:
sudo mhwd-kernel -i linux419 **rmc**
Why did author of this page said:
this command will install new kernel 3.13 to replace the currently run kernel, since the command stated linux419… why 3.13 ?
What does rmc in this cli means ? i can’t find rmc at all in
$ mhwd-kernel -h
Usage: mhwd-kernel [option]
-h --help Show this help message
-i --install Install a new kernel [kernel(s)] [optional: rmc = remove current kernel]
-l --list List all available kernels
-li --listinstalled List installed kernels
-r --remove Remove a kernel [kernel(s)]
hmm… i rebooted using kernel 510, used this cmd to remove kernel512… sudo pacman -R linux512 linux512-headers linux512-extramodules
ran sudo update-grub (i think this cmd is not needed to run)
now i am booting in 510 even when i click on “manjaro linux”… however, my de is starting up slower… like i can actually feel it is slower… by maybe 1 or 2 seconds… as compare to before i remove 5.12 kernel.
However i did boot up with 510 kernel (before i remove 512 kernel), it never like this slow (even though 1 to 2 secs is not a big deal), just that is it something uninstalled not that flawlessly ? why slow at DE gui as compare to before uninstall kernel 512 ?