[lfs-support] More GRUB--Progress by Failure--Now Questions

Dan McGhee beesnees at grm.net
Sun Nov 10 14:51:52 PST 2013

On 11/10/2013 09:22 AM, Dan McGhee wrote:
> I pooled Bruce's and Ken's comments from the last few days with my
> observations and goals.  I now get GRUB2 to load in EFI.  That's a good
> thing.  I must do it manually by interrupting the boot process and
> selecting grubx64.efi.  I want the Boot Manager to default to this, but
> that's the project after I can boot LFS-7.4, Ubuntu and Windows 8 from
> my grub screen.  I cannot boot either LFS-7.4 or Ubuntu from my
> grubx64.efi.
> Thinking of what Ken said about my LFS kernel not being bootable, I
> added a menuentry for Ubuntu whose kernel I know boots.  The same thing
> happens when I try to boot LFS or Ubuntu--the screen goes blank and I
> get a white, non-flashing dash in the upper left hand corner of my
> screen.  I now have a situation I that can be solved "practically"
> rather than experimenting with theory--a good change. I think my
> grub.cfg needs massaging.  Here is that file in all of its radiant beauty:
>> set gfxmode=auto
>> insmod all_video
>> insmod gfxterm
>> set lang=en_US
>> set timeout=10
>> menuentry 'LFS-7.4' {
>> insmod part_gpt
>> insmod ext2
>> set root=(hd0,gpt6)
>> linux /boot/vmlinuz-3.10.10-lfs-7.4 root=/dev/sda6 ro
>> }
>> menuentry 'Ubuntu' {
>> insmod part_gpt
>> insmod ext2
>> set root=(hd0,gpt10)
>>   linux   /boot/vmlinuz-3.8.0-33-generic root=/dev/sda10 ro
>> initrd /boot/initrd.img-3.8.0-33-generic
>> }
>> menuentry "Windows 8" {
>> set root=D60C-39DF
>> chainloader (${root})/EFI/Boot/bkpbootx64.efi
>> }
> Before I quit last night, I had only the menuentry for LFS in the file
> and when I tried to boot, I got the message "No suitable video mode
> found."  This morning I read, and copied and plagiarized and came up
> with the entries at the top of the file.  I don't know if I have good
> ones, or enough or the right ones.  What I do know is that in addition
> to the inability to boot LFS7.4, I cannot boot Ubuntu--which I know
> boots--using this grub.cfg.  (BTW, I did not test Windows from this file.)
> As a highlight (?) to this post let me add something.  As I was writing
> this and looked at the entry for Windows 8, I thought that I could get
> Ubuntu to boot, by directing grub to Ubuntu's *x64.efi file.  If that's
> true, then I would be using GRUB as a Boot Manager in EFI and not a
> bootloader--although each grub.cfg would have that's distro's root,
> kernel and image files.  This bears further research.
> But for right now, I'd like to get both LFS and Ubuntu to boot from this
> grub.cfg using "linux" and "initrd" lines--like in the "old" :) days.
> Hopefully, I can get a good analysis and fix from the folks here on this
> list.  I could do the "video stuff" before grub evolved to the state it
> is today.  Now, I'm in the dark--and not because it's night.  :)
> Thanks,
> Dan
Using the article that Ken found at Arch-Wiki I learned that video had 
to be initialized in efi. I changed the first part of grub.cfg to

> insmod efi_gop
> insmod efi_uga
> insmod font
> if loadfont ${prefix}/fonts/unicode.pf2
> then
> insmod gfxterm
> set gfxmode=auto
> set gfxpayload=keep
> terminal_output gfxterm
> fi

That changed the results to a new blank screen. Although slight, it's 
still more progress. But I have exhausted my knowledge and my googling 
isn't revealing anything new. I'm stymied. I'd like to get some 
suggestion as to where to go from here.


More information about the lfs-support mailing list