Emulate UEFI on a BIOS system.

[camo]

http://www.rodsbooks.com/bios2uefi/

This may be of some use to people. Apparently DUET emulates UEFI on a BIOS based PC. I have no way to test it if someone wants to try it out and let us know how it goes.

[fokuboo]

dont waste yout time on DUET
Just do that :

(I do my best i'm french)

First download SteamOS
Download this version of Syslinux : https://www.kernel.org/pub/linux/utils/boot/syslinux/syslinux-6.02.zip
Download this : http://www.l4d3.org/grub-pc_1.99-27+deb7u1+steamos3+bsos1_amd64.deb
And this : http://www.l4d3.org/grub-pc-bin_1.99-27+deb7u1+steamos3+bsos1_amd64.deb

Format your USB stick in FAT32
Extract the SteamOS to your USB key on root
Create a 'grub' directory on root
Create a 'syslinux' directory on root
Put the 2 .deb you download in the grub directory
Extract the syslinux-6.02.zip (only bios/mbr and bios/win32) in the syslinux directory
Open your command prompt in administrator mode and type :
X:\syslinux\win32\syslinux.exe --install --mbr --active X:
(X is you USB key)
Open Notepad and type :
DEFAULT linux
TIMEOUT 50
LABEL linux
kernel install.amd/vmlinuz
append initrd=install.amd/gtk/initrd.gz preseed/file=/cdrom/default.preseed DEBCONF_DEBUG=developer desktop=steamos auto=true priority=critical video=vesa:ywrap,mtrr vga=788 -- quiet

Save it to the USB key root as 'syslinux.cfg'
Now your Key is ready to install

Open the computer you want to install SteamOS on it and boot on the USB
The installation will start

You will have a 'grub error'
At this point do ctrl+alt+F2 and then Enter to enter the Terminal
Type
chroot /target /bin/bash

apt-get install grub-common grub2-common
(you have to press Y to accept the installation)

dpkg -i /media/cdrom/grub/grub-pc-bin_1.99-27+deb7u1+steamos3+bsos1_amd64.deb
dpkg -i /media/cdrom/grub/grub-pc_1.99-27+deb7u1+steamos3+bsos1_amd64.deb
(you have to choose the harddrive for the grub installation (deb/sda if it's your first hardrive) press space on the hardrive you choose and then enter to accept)
When it's over do ctrl+alt+F5

Click Next, Next choose Finish the installation, a message will appear to tell where is the grub, just type deb/sda. The installation will continu and then finish

Welcome to linux
login : steam
password : steam
Choose the GNOME interface

Connect you to internet and then go at the top left Activities/Applications/Terminal
Type : steam
(if you need a password type : steam, if that doesnt work type : passwd
enter the UNIX password : steam
enter the new password
enter the new password
then try : steam again)
Accept the end-user agreement and update steam, (take 5min)
Then log off
Re-enter with the login : desktop password: desktop
Go to the terminal again and type : ~/post_logon.sh
Your computer will reboot and now....Welcome to SteamOS!