On 8/13/22 14:09, Albretch Mueller wrote:
On 8/12/22, David Wright <deblis@lionunicorn.co.uk> wrote:I typed the text at the top of the screen in your first image, and got plenty of suggestions from Dell, reddit, and some Scottish Uni gamers.Basically, what I distilled out of many of those posts is that you should disable "Secure Boot", but I had already disabled it. I will keep fighting this matter and if/when I find a solution I will post it here. There are many people using those DELL laptops some of which use Debian. lbrtchx
I have a 16 GB USB flash drive with Debian 11 that was installed using a UEFI machine. AIUI it uses GPT partitioning and the appropriate Debian bootloader(s) are cryptographically signed and compatible with Secure Boot.
I have a Dell Latitude 5400 with Windows 10 Pro, which defaults to UEFI and Secure Boot.
To boot the Dell using the Debian 11 UEFI USB stick, I found that I needed to change one firmware setting:
CMOS Setup
-> System Configuration
-> SATA Operation
-> AHCI
To boot Windows, I must reset it:
CMOS Setup
-> System Configuration
-> SATA Operation
-> RAID On
David