Thank you Samuel. Dear friends,
I got a new laptop that has UEFI. It can NOT be booted from my Debian 12 installed on an external USB hard drive (the menu just shows NO Debian option). But it can be booted from another USB with Debian 12 installer. So I reinstalled the whole Debian 12 on the same USB hard drive. After I completed the installation and reboot the laptop, there is still NO bootable Debian shown. If you were the right person I am asking, please tell me what to do with my new laptop. If NOT, please refer me to the right person who can help me. Your help would be highly appreciated. Henry -- Muchiu (Henry) Chang, PhD. Cantab Patent Mapping Intelligence Researcher & Monte Carlo Modeling Simulation Expert

