On 3/18/12 7:18 AM, Mathijs Kwik wrote: > Shea Levy<[email protected]> writes: > >> Hi Mathijs, >> >> It's not totally complete. In particular, the >> installRemovableMediaImage option installs an EFI program that is a) >> really hacky and b) depends on protocols not available on every >> firmware (though when they're not available the boot fails with no bad >> effects). I'm working with the kernel devs to ameliorate the problem >> that necessitated the hack in the first place. I also need to do more >> extensive testing, especially on the macbook pro. That being said, I >> have been using it exclusively on my desktop for the past week or so >> with several successful rebuilds, so there's that. If you do want to >> try it out, I recommend trying the latest ISO from >> http://hydra.nixos.org/job/nixos/trunk/iso_efi but if it doesn't boot >> in EFI mode boot it in BIOS mode for the install then, if your system >> supports efibootmgr, re-run switch-to-configuration after booting into >> the built system to install the boot manager entries. > EFI mode doesn't boot. The CD does show up as an UEFI boot option, but > if I select it, I get a very fast blue flash (grub menu ?), > followed by my installed (harddisk) grub starting (in bios mode). > > Should I just try to switch my running system to UEFI using > boot.loader.efiBootStub? > I guess I can always just boot my current BIOS/grub entry when it fails. > > I don't fully see how efibootstub would work, how does it plug in to > grub2_efi?
It doesn't. Starting with Linux 3.3, the kernel itself is compiled as an EFI executable when the right option is set. So we don't need grub2_efi any more. > As far as I know (at least on my system) efibootmgr cannot > communicate with the uefi when booted in bios mode, so I'm pretty sure I > need a working boot cd, or supply the bootmgr entry in the UEFI shell > myself. (I had to do that for grub2_efi on Arch) Right. You need to be in EFI mode, an EFI shell, or a firmware bootmanager interface in order to set a boot option. I'll be sure to document all this more clearly once it's closer to done :) > > Mathijs > > >> Let me know if you have any problems. >> >> Cheers, >> Shea >> >> On 3/16/12 4:34 PM, Mathijs Kwik wrote: >>> Hi Shea, >>> >>> I saw your commits dealing with uefi booting. >>> On my laptop, windows 7 boots fine from uefi. >>> However, linux doesn't. Grub-uefi boots, but something goes wrong >>> (memory mapping) when handig control to the kernel. >>> In the past, I've spent countless hours debugging it to no avail. >>> >>> I would like to give it another try someday soon. >>> Do you consider your uefi changes somewhat complete? Or do you still >>> have more changes planned? >>> >>> Anyway, thanks for your work. >>> >>> Mathijs _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
