Le samedi 12 janvier 2019 21:43:21 UTC+1, [email protected] a écrit :
> Hi,
> 
> Error message :
> 
> [3.680649] Call Trace:
> [3.680707] dump_stack+0x5c/0x85
> [3.680764] panic+0xe4/0x252
> [3.681184] mount_block_root+0x35b/0x52c
> [3.681601] ? do_early_param+0x16e/0x16e
> [3.682018] prepare_namespace+0x278/0x2d5
> [3.682434] ? do_early_param+0x16e/0x16e
> [3.682851] kernel_init_freeable+0x2e8/0x32d
> [3.683270] ? rest_init+0xb0/0xb0
> [3.683685] kernel_init+0xa/0x101
> [3.684101] ret_from_fork+0x35/0x40
> [3.684536] Kernel Offset: disabled.
> 
> So, I booted into recovery mode prompt from a USB key (Troubleshooting and 
> Rescue a Qubes system (read-write choice). 
> 
> It seems that I can’t boot an older kernel version.
> 
> # ls /boot
> initramfs-vmlinuz-4.14.74-1.pvops.qubes.x86_64
> #
> 
> I don't really know what to do to fix it.
> 
> Your help will be greatly appreciated! 
> 
> Thank you a lot for your valued assistance

Fixed :-)

grub.cfg corrupted. Missing two lines :

echo                    'Loading initial ramdisk ...'
module                  --nounzip       /initramfs-4.14. 
74-1.pvops.qubes.x86_64.img

I found a backup of the grub.cfg file in user's home directory (dated Sept. 26 
2018). Fortunately I make backups.

Reboot with an older kernel version and :

sudo dracut /boot/initramfs-4.14.74-1.pvops.qubes.x86_64.img 4.14. 
74-1.pvops.qubes.x86_64
sudo grub2-mkconfig -o /boot/grub2/grub.cfg

It is now fully operationnal.

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