Re: [gentoo-user] EFI install ( continum) [ system hangs at boot ]

[Tom H]

On Mon, Mar 2, 2015 at 2:00 AM, Fernando Rodriguez
<frodriguez.developer@×××××××.com> wrote:
> On Saturday, February 28, 2015 12:50:37 PM Tom H wrote:
>> On Fri, Feb 27, 2015 at 5:47 PM, Fernando Rodriguez
>> <frodriguez.developer@×××××××.com> wrote:
>>>
>>> Efibootmgr is not a boot manager, it's an utility to interface with the EFI
>>> firmware on the motherboard and you don't need to hardcode the command line
> on
>>> the kernel, look at the -u option of efibootmgr. You can even load an
> initrd
>>> with it by specifying the efi_memmap boot option. I use something like this
> (it
>>> shoulld work with any firmware because Windows uses it):
>>>
>>> efibootmgr -p 2 -c -b 0001 -l "\EFI\Linux\vmlinuz.efi" -L "Gentoo Linux" -u
>>> "root=/dev/sda2 resume=/dev/sda3 quiet splash efi_memmap
>>> initrd=/EFI/Linux/initramfs.img"
>>
>> Interesting. I must be over-complicating things because I use the
>> following when I want to use the EFI stub without gummiboot:
>>
>> # cat /boot/efi/efi-extra.txt \
>>     | iconv -f ascii -t ucs2 \
>>     | efibootmgr -b 0000 -c -L 3.19.0 -l vmlinuz-3.19.0 -u -@ -
>>
>> where
>>
>> # cat /boot/efi/efi-extra.txt
>> initrd=initrd.img-3.19.0
>> root=UUID=b51ee688-137c-47ec-9635-b69434b4e1f8 ro
>> init=/lib/systemd/systemd
>
> It's a good idea to do that as it's less error prone. I don't know if you need
> iconv in the pipeline but if you put the arguments on the command line it's
> not needed. I just called my kernel vmlinuz.efi so I don't need to do that
> everytime I update it and use grub if I need to boot an alternate kernel or
> boot with different options.

Thanks. Next time that I feel adventurous, I'll replace my gummiboot
nvram entry with a vmlinuz one without cat and iconv. I made big
changes after the last efi boot thread on this list so I'll wait a
bit. :)