Re: Advise on how to debug screen with only GRUB and blinking cursor and possibly save my dualboot installation

[Goh Lip]

On 12/19/22 22:20, Sophoklis Goumas wrote:

> This setup, as unconventional/wrong as it is, WAS working flawlessly

> Sophoklis



Boot into Debian whichever way (you used super-grub2-disk)

*important* Check that Debian is in sda or sdb (findmnt /)


sudo grub-install --target=i386-pc --boot-directory=/boot /dev/sda 
--recheck --debug
Use '/dev/sdb' in above command if findmnt tells you your disk is sdb 
instead of sda
sudo update-grub


If in the event (possible) there is no windows entry or windows does not 
boot, add a Windows entry to /boot/grub/custom.cfg (you may have to 
create this file first)



menuentry  "Windows - Custom "  {
  insmod part_msdos
  insmod ntfs
  set root='hd0,msdos1'
  search --no-floppy --fs-uuid --set=035E850A2759A4E0
  ntldr /bootmgr
}


above long string is UUID for your windows partition (use yours of course)