Package: debian-cd Severity: minor
When I write the image debian-13.5.0-amd64-netinst.iso via dd to an USB stick and boot the Supermicro server it only boots in legacy mode. If I force UEFI in the BIOS the USB stick is not detected at all. Booting in UEFI mode works, if I boot from a virtual media via IPMI (means a virtual CD). Hardware: Supermicro Server AS -8125GS-TNHR Mainboard: H13DSG-O-CPU-D Firmware 01.08.02 Redfish Version 1.22.2 BIOS Firmware Version BIOS Date: 03/06/2026 Ver 3.9 Bios settings (force UEFI): "Legacy USB Support" selectedOption="Disabled "Boot Mode Select" selectedOption="UEFI" "LEGACY to EFI Support" selectedOption="Enabled" Supermicro says in two FAQs for different servers, that you must "format your USB drive in GPT partition scheme for UEFI." See https://www.supermicro.com/en/support/faqs/faq.php?faq=22149 and https://www.supermicro.com/en/support/faqs/faq.php?faq=41748 I will add more detailed tests with other ISOs, after I gott he bug number. -- best regards Thomas
