Windows Dual Boot, with Secure Boot, release criteria

Michael Catanzaro mcatanzaro at
Fri Jan 16 16:46:29 UTC 2015

On Thu, Jan 15, 2015 at 10:42 PM, Chris Murphy 
<lists at> wrote:
> If these are UEFI computers, the drive uses GPT, or the manufacturer
> has enabled legacy booting (CSM-BIOS) and MBR partition scheme is
> used. We can install Fedora in either case. And regardless USB can be
> either GPT or MBR, UEFI supports both.

They are UEFI computers where the manufacturer has enabled legacy 
booting (CSM-BIOS) and the MBR partition scheme is used, but where 
legacy boot is very difficult to enable for USBs. Every new Windows 7 
computer I've seen in the past year (small sample size: two or maybe 
three) has been set up like this.

On my computers, I have two boot options for each USB: normal UEFI boot 
and legacy boot. On these new computers, the legacy boot option is not 
present at all; to get to it, you have to muck around with the 
motherboard settings (normally to completely disable UEFI boot), and 
invariably there is no clear way to get to those (so prepare to press a 
bunch of function keys and reboot many times). Fedora can only be 
installed if you can manage to find the legacy boot option. By default, 
the boot menu is not presented at all: you'll just boot into Fedora 
after inserting the USB stick, and installation will fail with an 
obscure error message (complaining about the lack of an EFI system 
partition -- of course there is none!) at the partitioning stage.
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