[Grub2] Multiboot - how to set boot parameters [solved]

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[Grub2] Multiboot - how to set boot parameters [solved]

Postby TSMS on Mon Feb 18, 2013 5:12 am

I'm running Linux Mint 14 and Lubuntu 12.10 on my laptop. After updating Grub on Mint it automatically detected Lubuntu and I have no problem booting into it. But I have no clue, how to set specific kernel options for Lubuntu.

Editing "GRUB_CMDLINE_LINUX_DEFAULT" in /etc/default/grub only affects Mint and not Lubuntu. Also editing /etc/default/grub on the Lubuntu partition didn't changed its boot options (so update-grub on Mint doesn't adept the boot options for Lubuntu set there). Neither changes editing "GRUB_CMDLINE_LINUX" anything. I tried ddg-ing and googling for help, but did not find anything remotely useful.

In short:
I want to set specific boot parameters for Lubuntu while using Grub2 installed on a Mint partition. How do I do that?

Sorry for bothering, I eventually figured it out myself. Basically the Grub-Loader adepts the settings of the /boot/grub/grub.cfg file, not of the files generating the grub.cfg.

How to set boot options for a secondary partition:

1. Boot into said partition
2. Configure the Grub of this partition using /etc/default/grub or the files in /etc/grub.d/
3. run update-grub on the secondary OS (the step I forgot)
4. restart and boot into the main partition (the one Grub is installed on)
5. run update-grub there
6. restart, enjoy.
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