Re: bug 1006304 - Re: Many attempts to install f20 today

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On Dec 31, 2013, at 1:25 PM, Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> wrote:
> 
> You got them.  let me know if anything else is needed to get this working.  It takes ~ 2hrs to do a test.

I don't see any kernel configs for EFI that aren't already enabled in config. And there isn't a debug option for _EFI_VARS so I don't know how we get more info when the kernel fails to make NVRAM changes.

Macs have had a long history of using PRAM/NVRAM with a ritualistic keyboard command on boot used to perform the voodoo incantation of "zapping the PRAM" to clear all entries. Since HFS+ has a volume header that includes a pointer to the bootloader, that is used as a fallback when NVRAM is empty. 

If Fedora is the only installed system, we have BOOTX64.efi and fallback.efi which possibly sort out what happens if NVRAM is cleared. I don't know about multiboot with Windows or other Linux distros, whether Microsoft puts a BOOTX64.efi there, and whether Fedora replaces it.



Chris Murphy
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