GRUB doesn't boot all kernels

blind Pete 0123peter at gmail.com
Sun Jul 10 11:40:24 UTC 2016


Ralf Mardorf wrote:

> Hi,
> 
> for Wily and Arch Linux I build 3.10.61-rt65 and was able to boot it.
> Now I build it for Xenial, too, no errors during building it, packages
> could be installed without issues.
> If I try to boot it, GRUB claims to boot it, but then just a flashing
> cursor is shown and nothing else happens.

It could be the kernel rather than grub.  

BIOS or UEFI firmware?  

Grub classic or grub2?  

How many installations do you have? 

Which one updated grub most recently?  

More stupid questions when I think of them.  

> Journalctl only shows information related to 3.10.61-rt65 used with Wily
> [1], today's trials to boot the new compiled 3.10.61-rt65 Xenial build are
> not mentioned.
> FWIW, I also re-installed grub [2] and let Xenial generate a grub.cfg [3],
> with the automatically build grub.cfg, the last message shown by GRUB is
> "Loading initial ramdisk..." and then it shows a not flashing cursor and
> hangs.
> Booting 4.4.0-28-lowlatency, x86_64 from official repositories works.
> 
> Is there a way to get a log file about what is going on?
> I'll try recovery mode later today.
> 
> Regards,
> Ralf
> 
> [1]
> [root at moonstudio weremouse]# journalctl | grep rt65 | tail -n3
> Mar 18 19:58:54 moonstudio kernel: Linux version 3.10.61-rt65-1-moonstudio
> (root at moonstudio) (gcc version 5.2.1 20150808 (Ubuntu 5.2.1-15ubuntu1) )
> #1 SMP PREEMPT RT Sun Aug 23 02:13:10 CEST 2015 Mar 18 19:58:54 moonstudio
> kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-3.10.61-rt65-1-moonstudio
> root=UUID=f705d2d5-0c6a-4338-8435-1bb56d7b6b19 ro Mar 18 19:58:54
> moonstudio kernel: Kernel command line:
> BOOT_IMAGE=/boot/vmlinuz-3.10.61-rt65-1-moonstudio
> root=UUID=f705d2d5-0c6a-4338-8435-1bb56d7b6b19 ro
> 
> [2]
> [root at moonstudio weremouse]# grub-install /dev/sda
> Installing for i386-pc platform.
> Installation finished. No error reported.
> [root at moonstudio weremouse]# echo $?
> 0
> [root at moonstudio weremouse]# /mnt/archlinux/bin/bootinfoscript
> [/tmp/boot.txt
> 
> Boot Info Script 0.61      [1 April 2012]
> [snip]
> [root at moonstudio weremouse]# grep Grub2 -A2 /tmp/boot.txt
>  => Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector
>  1 of
>     the same hard drive for core.img. core.img is at this location and
>     looks in partition 97 for .
> 
> [3]
> [root at moonstudio weremouse]# grub-mkconfig -o /boot/grub/grub.cfg
> [snip]
> Found linux image: /boot/vmlinuz-3.10.61-rt65-1-moonstudio
> Found initrd image: /boot/initrd.img-3.10.61-rt65-1-moonstudio
> [snip]
> done
> [root at moonstudio weremouse]# echo $?
> 0
-- 
blind Pete
Sig goes here...  




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