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Gruentee

Member

Registered: 2012-07-30

Posts: 4

Website

GRUB / grub-mkconfig creating huge file and hangs

Hi fellow Arch users,

I have the following drive setup:

NAME   FSTYPE LABEL     UUID                                 MOUNTPOINT
sda                                                          
├─sda1 ext4   home      1e5559fb-7d5e-40b7-b66b-78f2789dc648 /home
├─sda2 ntfs             F0BA3F29BA3EEBAA                     
└─sda3 swap   swap      7393c4fe-05ee-4fb1-81e7-c198ef4c2627 [SWAP]
sdb                                                          
├─sdb1                                                       
└─sdb2 btrfs  root      3f59946a-4789-4a4c-beaa-05d69a82a723 /
sdd                                                          
└─sdd1 btrfs  DATA320GB 12572d8f-5bad-40ae-8fe2-a48f0b5ec947 /run/media/connzen

Now when I call `grub-mkconfig` it takes veeery long so that I have to kill it manually and creates a huge grub.cfg file with probably binary data appended to the normal grub menu text at the beginning.

Somehow, after having found the regular kernel images on `/boot` it seems to find a lot more images which I have no knowledge of:

Ubuntu 14.04.2 LTS auf /dev/sdb2 gefunden
Ubuntu 14.04.3 LTS auf /dev/sdb2 gefunden
Ubuntu 14.04.2 LTS auf /dev/sdb2 gefunden
Debian GNU/Linux 8 (jessie) auf /dev/sdb2 gefunden
Ubuntu 14.04.4 LTS auf /dev/sdb2 gefunden
Debian GNU/Linux 8 (jessie) auf /dev/sdb2 gefunden
Debian GNU/Linux 8 (jessie) auf /dev/sdb2 gefunden
Debian GNU/Linux 9 (stretch) auf /dev/sdb2 gefunden
Debian GNU/Linux 9 (stretch) auf /dev/sdb2 gefunden
Debian GNU/Linux 9 (stretch) auf /dev/sdb2 gefunden

Does anyone have a slight idea what could cause this?

Please ask if you need any more information about my system configuration.

Best regards,
Constantin

Last edited by Gruentee (2018-10-11 20:20:42)

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For every complex problem there is an answer that is clear, simple and wrong. ~ H.L. Mencken

Maniaxx

Member

Registered: 2014-05-14

Posts: 738

Re: GRUB / grub-mkconfig creating huge file and hangs

The generating scripts are in /etc/grub.d/. If you have os-prober installed try disabling it and test again (chmod -x 30_os-prober). If this doesn't help pin down the problem by disabling even more (e.g. 10_linux). If you have the culprit look into it what could be the cause.

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sys2064

eschwartz

Fellow

Registered: 2014-08-08

Posts: 4,097

Re: GRUB / grub-mkconfig creating huge file and hangs

grub-mkconfig is ugly and messy, why not write your own?

$ cat /boot/grub/grub.cfg
set timeout=1
set default=0
set btrfsroot=53731b6e-8cce-467c-bf07-be1b04207846

# Use UEFI's Graphics Output Protocol.
insmod efi_gop

menuentry "Arch Linux" {
    linux  /boot/vmlinuz-linux root=UUID=$btrfsroot rw
    initrd /boot/intel-ucode.img /boot/initramfs-linux.img
}

menuentry "Arch Linux Fallback" {
    linux  /boot/vmlinuz-linux root=UUID=$btrfsroot rw
    initrd /boot/intel-ucode.img /boot/initramfs-linux-fallback.img
}

More generic grub.cfg example: https://ptpb.pw/mk7y

Last edited by eschwartz (2018-10-12 02:52:00)

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