[gentoo-user] GPT-UEFI-fstab questions

[gentoo-user] GPT-UEFI-fstab questions

[James]

Hello,

I've made another run and this, using this document guide:
http://code.google.com/p/pentoo/wiki/UEFI#UEFI_pentoo-installer_guide_for_UEFI_and_GPT

it all seem to be fine; except grub 2 cannot find the kernel.
The GPT is read fine by grub2. But, grub 2 cannot find
the kernel, explicitly the error messages from grub2:

error : file '/boot/kernel-genkernel-x86_64-3.3.9-pentoo' not found.
error: you need to load the kernel first


Here is the fstab:

UUID="EFA3-8415" /boot/efi                   vfat       default    0 1
#sda2
UUID="cf76566e-bf4e-4dee-ab9d-6fc2bcdd5b1b" /boot ext2  defaults   0 1
#sda3
UUID="0ef33e5a-7869-418e-86be-1ef5e16b4495"  none swap  sw         0 0
#sda4
UUID="fc8efde7-359e-41b1-94b0-8a9a868bdf24"  /    ext4  defaults   0 0

shm             /dev/shm        tmpfs           nodev,nosuid,noexec     0 0
/dev/cdrom              /mnt/cdrom      audo            noauto,ro       0 0


If you look at the table, which I followed, the names are in all caps, but
I used lowercase; could this be the problem?



The table from the aforementioned doc:
    Select "gpt" as Partition Table
    Create the following partitions: 

# 	FS 	Size 	mount point 	name
/dev/sda1 	vfat 	256M 	/boot/efi 	UEFI
/dev/sda2 	ext2 	64M 	/boot 	BOOT
/dev/sda3 	swap 	4G 		SWAP
/dev/sda4 	ext4 	16G 	/ 	ROOT

Booting GRUB-2 through UEFI

    On "4. Install Bootloader" choose "UEFI-GRUB".
    The UEFI boot partition will be /dev/sda1.
    The GRUB device path will be (hd0,2) - the default, /dev/sda2 where the
kernel resides. 


ANY IDEAS?


James

Re: [gentoo-user] GPT-UEFI-fstab questions

[Michael Hampicke]

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Am 14.11.2013 18:18, schrieb James:
> Hello,
> 
> I've made another run and this, using this document guide:
> http://code.google.com/p/pentoo/wiki/UEFI#UEFI_pentoo-installer_guide_for_UEFI_and_GPT
> 
> it all seem to be fine; except grub 2 cannot find the kernel.
> The GPT is read fine by grub2. But, grub 2 cannot find
> the kernel, explicitly the error messages from grub2:
> 
> error : file '/boot/kernel-genkernel-x86_64-3.3.9-pentoo' not found.
> error: you need to load the kernel first
> 
> 
> Here is the fstab:
> 
> UUID="EFA3-8415" /boot/efi                   vfat       default    0 1
> #sda2
> UUID="cf76566e-bf4e-4dee-ab9d-6fc2bcdd5b1b" /boot ext2  defaults   0 1
> #sda3
> UUID="0ef33e5a-7869-418e-86be-1ef5e16b4495"  none swap  sw         0 0
> #sda4
> UUID="fc8efde7-359e-41b1-94b0-8a9a868bdf24"  /    ext4  defaults   0 0
> 
> shm             /dev/shm        tmpfs           nodev,nosuid,noexec     0 0
> /dev/cdrom              /mnt/cdrom      audo            noauto,ro       0 0
> 
> 
> If you look at the table, which I followed, the names are in all caps, but
> I used lowercase; could this be the problem?
> 
> 
> 
> The table from the aforementioned doc:
>     Select "gpt" as Partition Table
>     Create the following partitions: 
> 
> # 	FS 	Size 	mount point 	name
> /dev/sda1 	vfat 	256M 	/boot/efi 	UEFI
> /dev/sda2 	ext2 	64M 	/boot 	BOOT
> /dev/sda3 	swap 	4G 		SWAP
> /dev/sda4 	ext4 	16G 	/ 	ROOT
> 
> Booting GRUB-2 through UEFI
> 
>     On "4. Install Bootloader" choose "UEFI-GRUB".
>     The UEFI boot partition will be /dev/sda1.
>     The GRUB device path will be (hd0,2) - the default, /dev/sda2 where the
> kernel resides. 
> 
> 
> ANY IDEAS?

Please show us your grub2.cfg :-)
Also try using the output of grub2-mkconfig as your grub2.cfg and see if
your machine boots.


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[gentoo-user] Re: GPT-UEFI-fstab questions

[James]

Michael Hampicke <mh <at> hadt.biz> writes:


> >     On "4. Install Bootloader" choose "UEFI-GRUB".
> >     The UEFI boot partition will be /dev/sda1.
> >     The GRUB device path will be (hd0,2) - the default, /dev/sda2 
> >     where the kernel resides. 

> Please show us your grub2.cfg 
> Also try using the output of grub2-mkconfig as your grub2.cfg and see if
> your machine boots.


During the pentoo install, I capture this:


now review the "/tmp/efibootpart/boot/grub2/grub.cfg"

timeout=5
menuentry 'Pentoo' {
    insmod efi_gop
    insmod efi_uga
    insmod part_msdos
    insmod part_gpt
    root=(hd0,2)
    linux /boot/kernel-genkernel-x86_64-3.9.9-pentoo root=/dev/ram0
real_root= video= console=tty1 ro
    initrd /boot/initramfs-genkernel-x86_64-3.9.9-pentoo
}


James

Re: [gentoo-user] Re: GPT-UEFI-fstab questions

[Rick "Zero_Chaos" Farina]

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Hash: SHA1

On 11/14/2013 01:17 PM, James wrote:
> Michael Hampicke <mh <at> hadt.biz> writes:
> 
> 
>>>     On "4. Install Bootloader" choose "UEFI-GRUB".
>>>     The UEFI boot partition will be /dev/sda1.
>>>     The GRUB device path will be (hd0,2) - the default, /dev/sda2 
>>>     where the kernel resides. 
> 
>> Please show us your grub2.cfg 
>> Also try using the output of grub2-mkconfig as your grub2.cfg and see if
>> your machine boots.
> 
> 
> During the pentoo install, I capture this:
> 
> 
> now review the "/tmp/efibootpart/boot/grub2/grub.cfg"
> 
> timeout=5
> menuentry 'Pentoo' {
>     insmod efi_gop
>     insmod efi_uga
>     insmod part_msdos
>     insmod part_gpt
>     root=(hd0,2)
>     linux /boot/kernel-genkernel-x86_64-3.9.9-pentoo root=/dev/ram0
> real_root= video= console=tty1 ro
>     initrd /boot/initramfs-genkernel-x86_64-3.9.9-pentoo
> }
> 
I would like to note that in pentoo-installer grub2 is marked
experimental and I honestly don't expect it to work at all.

I am beyond happy to accept patches that fix that, I currently lack time
and substantial motivation to work on such things.  grub1 works.

Thanks,
Zero

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[gentoo-user] Re: GPT-UEFI-fstab questions

[James]

Rick "Zero_Chaos" Farina <zerochaos <at> gentoo.org> writes:

> > timeout=5
> > menuentry 'Pentoo' {
> >     insmod efi_gop
> >     insmod efi_uga
> >     insmod part_msdos
> >     insmod part_gpt
> >     root=(hd0,2)
> >     linux /boot/kernel-genkernel-x86_64-3.9.9-pentoo root=/dev/ram0
> > real_root= video= console=tty1 ro
> >     initrd /boot/initramfs-genkernel-x86_64-3.9.9-pentoo
> > }

> I would like to note that in pentoo-installer grub2 is marked
> experimental and I honestly don't expect it to work at all.
 
> I am beyond happy to accept patches that fix that, I currently lack time
> and substantial motivation to work on such things.  grub1 works.

> Thanks,
> Zero

Ahhhhhhhhhhh, you guys do exist; NICE piece of work! Sure, I'll figure it
out and drop you a line.   It'd be much easier on me if you activated my
request for a dev account...... 


Just for the record, quite a few folks are having troubles with (U)EFI 
and it appears that the kernel signature is quite often the culprit,
from my preliminary research [1]. You got any comments about that?

James

[1]  http://kroah.com/log/blog/2013/09/02/booting-a-self-signed-linux-kernel/

Re: [gentoo-user] Re: GPT-UEFI-fstab questions

[Rick "Zero_Chaos" Farina]

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Hash: SHA1

On 11/14/2013 03:32 PM, James wrote:
> Rick "Zero_Chaos" Farina <zerochaos <at> gentoo.org> writes:
> 
>>> timeout=5
>>> menuentry 'Pentoo' {
>>>     insmod efi_gop
>>>     insmod efi_uga
>>>     insmod part_msdos
>>>     insmod part_gpt
>>>     root=(hd0,2)
>>>     linux /boot/kernel-genkernel-x86_64-3.9.9-pentoo root=/dev/ram0
>>> real_root= video= console=tty1 ro
>>>     initrd /boot/initramfs-genkernel-x86_64-3.9.9-pentoo
>>> }
> 
>> I would like to note that in pentoo-installer grub2 is marked
>> experimental and I honestly don't expect it to work at all.
>  
>> I am beyond happy to accept patches that fix that, I currently lack time
>> and substantial motivation to work on such things.  grub1 works.
> 
>> Thanks,
>> Zero
> 
> Ahhhhhhhhhhh, you guys do exist; NICE piece of work! Sure, I'll figure it

We do, we have an irc channel on freenode, a bug tracker on googlecode,
and I do a lot of talks at hacker cons.

> out and drop you a line.   It'd be much easier on me if you activated my
> request for a dev account...... 

Since I don't recognize your name, clearly you should be around my bug
tracker or irc more if you want a dev account ;-)
> 
> 
> Just for the record, quite a few folks are having troubles with (U)EFI 
> and it appears that the kernel signature is quite often the culprit,
> from my preliminary research [1]. You got any comments about that?

Yes, disable signature verification.  It's not possible to boot a
self-signed kernel from someone else unless you also add in their
certificate to the UEFI and at that point why even bother to sign the
thing?  Booting a self-signed kernel is cool, but me handing out signed
kernels and saying "add this to your UEFI as a valid cert" is exactly as
secure as not signing it at all.

- -Zero
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Re: [gentoo-user] Re: GPT-UEFI-fstab questions

[Michael Hampicke]

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Am 14.11.2013 19:17, schrieb James:
> Michael Hampicke <mh <at> hadt.biz> writes:
> 
> 
>>>     On "4. Install Bootloader" choose "UEFI-GRUB".
>>>     The UEFI boot partition will be /dev/sda1.
>>>     The GRUB device path will be (hd0,2) - the default, /dev/sda2 
>>>     where the kernel resides. 
> 
>> Please show us your grub2.cfg 
>> Also try using the output of grub2-mkconfig as your grub2.cfg and see if
>> your machine boots.
> 
> 
> During the pentoo install, I capture this:
> 
> 
> now review the "/tmp/efibootpart/boot/grub2/grub.cfg"
> 
> timeout=5
> menuentry 'Pentoo' {
>     insmod efi_gop
>     insmod efi_uga
>     insmod part_msdos
>     insmod part_gpt
>     root=(hd0,2)
>     linux /boot/kernel-genkernel-x86_64-3.9.9-pentoo root=/dev/ram0
> real_root= video= console=tty1 ro
>     initrd /boot/initramfs-genkernel-x86_64-3.9.9-pentoo
> }
> 

Do you have the boot symlink on your boot partition?
$ ls -al /boot/boot
lrwxrwxrwx 1 root root 1 Sep 23  2011 /boot/boot -> .


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[gentoo-user] Re: GPT-UEFI-fstab questions

[James]

Michael Hampicke <mh <at> hadt.biz> writes:


> >> Please show us your grub2.cfg 

> > now review the "/tmp/efibootpart/boot/grub2/grub.cfg"

> > timeout=5
> > menuentry 'Pentoo' {
> >     insmod efi_gop
> >     insmod efi_uga
> >     insmod part_msdos
> >     insmod part_gpt
> >     root=(hd0,2)
> >     linux /boot/kernel-genkernel-x86_64-3.9.9-pentoo root=/dev/ram0
> > real_root= video= console=tty1 ro
> >     initrd /boot/initramfs-genkernel-x86_64-3.9.9-pentoo
> > }
> > 
> 
> Do you have the boot symlink on your boot partition?
> $ ls -al /boot/boot
> lrwxrwxrwx 1 root root 1 Sep 23  2011 /boot/boot -> .


Well, I'm using pentoo installer to set up a grub 1 box
just to verify that it works, as purported....


I'll have to mount everything to figure it out after looking
at what the pentoo installer has done....

Then I'll have the 2 pentoo boxes to look at and figure out
what's up.

thx,
James

Re: [gentoo-user] Re: GPT-UEFI-fstab questions

[Stefan G. Weichinger]

Am 14.11.2013 21:23, schrieb James:

>>> timeout=5
>>> menuentry 'Pentoo' {
>>>     insmod efi_gop
>>>     insmod efi_uga
>>>     insmod part_msdos
>>>     insmod part_gpt
>>>     root=(hd0,2)
>>>     linux /boot/kernel-genkernel-x86_64-3.9.9-pentoo root=/dev/ram0
>>> real_root= video= console=tty1 ro
>>>     initrd /boot/initramfs-genkernel-x86_64-3.9.9-pentoo
>>> }
>>>
>>
>> Do you have the boot symlink on your boot partition?
>> $ ls -al /boot/boot
>> lrwxrwxrwx 1 root root 1 Sep 23  2011 /boot/boot -> .


I want to take another effort and retry to get my box booted via UEFI
again. I had that working back then, Gentoo and Win7 ... since it failed
due to some SSD-swapping and stuff I have never seen Win7 again ;-)

Aside from the "I want it because it sounds more modern and is
complicated": do we get any benefit from booting via UEFI?

AFAI understand (haven't googled it today but read about it back then)
one of the major issues is hdd- and partition-size, right? So if I only
have disks/partitions smaller than 2 TB ... no real difference, right?

I also play around with the booting of EFI-Stub-Kernels ... (getting rid
of GRUB2)

I got it started but it somehow stopped booting and just sat there. With
and without EFI_FB set.

Maybe I should use part-uuids instead of device-names next time
especially as I have / on sdc1 and the UEFI-ESP on sda1 (just a thought).

just asking for discussion and experience ...

Stefan

[gentoo-user] Re: GPT-UEFI-fstab questions

[James]

Stefan G. Weichinger <lists <at> xunil.at> writes:

> just asking for discussion and experience ...

> Stefan

Hello Stefan,

Maybe you should start a new thread specifically about your
proboem and what you want to achieve.

My efforts (currently) are more focused on pentoo that UEFI,
as that part of my pentoo efforts is on hold until a figure
out a few more things.


I'll post as I can contribute to your new thread.

hth,
James

Re: [gentoo-user] Re: GPT-UEFI-fstab questions

[Stefan G. Weichinger]

Am 21.11.2013 19:45, schrieb James:
> Stefan G. Weichinger <lists <at> xunil.at> writes:
> 
>> just asking for discussion and experience ...
> 
>> Stefan
> 
> Hello Stefan,
> 
> Maybe you should start a new thread specifically about your
> proboem and what you want to achieve.
> 
> My efforts (currently) are more focused on pentoo that UEFI,
> as that part of my pentoo efforts is on hold until a figure
> out a few more things.
> 
> 
> I'll post as I can contribute to your new thread.

thanks for your suggestion.

Currently I am on the road and won't be back at that specific machine
for the next few days.

I will open a new thread as soon as I find the time to deal with this
topic again.

Greets, Stefan