[Bug 1675159] [NEW] missing initrd line for linux mint

[Conrad Heimbold]

Public bug reported:

My laptop has multiple linux distros installed: Fedora, Ubuntu Gnome and
Linux Mint.

When generating a new grub2.cfg file, both grub2-mkconfig (on Fedora) and update-grub2 (on Ubuntu) do not add the initrd line for all of the Linux Mint boot entries in grub2. 
Therefore, I can't boot Linux Mint (without manually changing the boot entries for Linux Mint). 

When I want to boot Linux Mint, I always have to do it manually from grub, via ...
linux (hd_,gpt_)/vmlinuz... root=/dev/disk/by-label/LINUX-MINT-ROOT
initrd (hd_,gpt_)/initrd...

Similar bug to #596266 : 
- Ubuntu's grub2-update correctly recognizes Fedora and creates correct grub2 boot entries for it
- Fedora's grub2-mkconfig correctly recognizes Ubuntu and creates correct grub2 boot entries for it.

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  missing initrd line for linux mint

Status in grub2 package in Ubuntu:
  New

Bug description:
  My laptop has multiple linux distros installed: Fedora, Ubuntu Gnome
  and Linux Mint.

  When generating a new grub2.cfg file, both grub2-mkconfig (on Fedora) and update-grub2 (on Ubuntu) do not add the initrd line for all of the Linux Mint boot entries in grub2. 
  Therefore, I can't boot Linux Mint (without manually changing the boot entries for Linux Mint). 

  When I want to boot Linux Mint, I always have to do it manually from grub, via ...
  linux (hd_,gpt_)/vmlinuz... root=/dev/disk/by-label/LINUX-MINT-ROOT
  initrd (hd_,gpt_)/initrd...

  Similar bug to #596266 : 
  - Ubuntu's grub2-update correctly recognizes Fedora and creates correct grub2 boot entries for it
  - Fedora's grub2-mkconfig correctly recognizes Ubuntu and creates correct grub2 boot entries for it.

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