Debian 12 bricked (won't boot). How to unbrick it?

How the brick happened:

  1. I have a SSD with a recently-installed UEFI Debian 12 (Kingston SA400S37120G). It was working just perfect; until
  2. I swapped temporarily the SSD by a HDD with Debian 11;
  3. When I swapped the SSD back, the Debian 12 is nowhere to be found on the motherboard Boot Settings (Asus Crosshair V Formula-Z). I get only a cursor when trying to boot again, or nothing, depending on the settings I choose. But no Debian 12 at all.

Why I can’t unbrick:

  1. When my Debian 11 bricked (most commonly on similar circumstances, like swapping by a Windows HDD), I quickly fixed it every time using a Rescatux thumb drive.
  2. However, Rescatux won’t work with my new graphics card (Nvidia Geforce GTX 1650).
  3. Therefore, I don’t have the easy Rescatux unbricking path at hand anymore, and don’t know what to do without it.


  1. Which information is needed to understand what happened, and how to get it?
  2. What can I do in order to unbrick my Debian 12 install?

Additional information:
Boot Info Summary @ Paste.Debian

Boot-Repair is for Linux systems. It really just updates grub or offers to reinstall grub or a few other settings. Will not fix Windows issues, unless the update to grub finds a Windows entry. Must be sure to boot in same boot mode as install. Most systems now are UEFI boot.

Please copy & paste the pastebin link to the BootInfo summary report ( do not post report), do not run the auto fix till reviewed. Use often updated ppa version with your USB installer or any working install over somewhat older ISO.

Very occasionally the default fix may not be best choice & then advanced mode required. Best then that someone knowledgeable on boot issues reviews report to confirm best fix.

If just UEFI boot entry missing, then the install of grub installs a new UEFI boot entry using efibootmgr. You can do that yourself. See:

man efibootmgr

Answered By: oldfred
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