Re: [gentoo-user][SOLVED] Computer does not boot

[Joseph]

On 01/31/15 19:54, Meino.Cramer@×××.de wrote:
>Joseph <syscon780@×××××.com> [15-01-31 19:32]:
>> On 01/31/15 11:59, Dale wrote:
>> >Meino.Cramer@×××.de wrote:
>> >>Joseph <syscon780@×××××.com> [15-01-31 18:12]:
>> >>>After recent upgrade my computer doesn't want to boot.  I did not do
>> >>>anything with grub or kernel.
>> >>>I get a bios flash and next is message:
>> >>>
>> >>>Loading operating system ...
>> >>>GRUB loading stage2
>> >>>
>> >>>and computer goes back reboot cycle, flash bios and the same massage
>> >>>is
>> >>>displayed.
>> >>>What went wrong during update?
>> >>>
>> >>>--
>> >>>Joseph
>> >>>
>> >>Hi Joseph,
>> >>
>> >>may be only a accidental coincidence...
>> >>One thing I can think of is an empty bios coin cell.
>>
>> What is an empty BIOS coin cell?
>>
>>
>> >>
>> >>If this is not the cause, check whether the stage2 grub
>> >>got deleted.
>>
>> How do I check if stage2 grub was deleted?
>> Thanks for your help
>> >
>> >OP, if it were me, I'd chroot in, re-emerge grub, reinstall grub to
>> >the
>> >drive and then try to reboot.  It doesn't seem to me that it is the OS
>> >itself or the kernel since it doesn't seem to get that far either.
>> >It's
>> >either a BIOS or a grub issue.  I'm thinking along the same lines of
>> >Meino myself.  Since chrooting in is a bit of a pain, I'd cover the
>> >whole field while in it.
>> >
>> >Don't forget, you can use the -K option to install from binaries if
>> >you
>> >save them.  That may save a little bit of time.
>> >
>> >Hope that helps.
>>
>> I boot strap from a CD and /boot and grup.conf looks normal the way I
>> install it.
>>
>> ...
>> title Gentoo Current Kernel
>> root (hd0,0)
>> kernel /boot/kernel-current root=/dev/sda3 vga=normal
>>
>> --
>> Joseph
>>
>
>Hi,
>
>(please read this completly before doing anything)
>
>on the motherboard of your PC there is a Real Time Clock (RTC), which
>keeps time and date correct while your PC is turned off. This RTC
>needs power...only a little bit but more then nothing. For that there
>is a battery holder (oh damn, I fear, this term is "german English...
>;) on the motherboard, which can easily be identified, because it
>is about of the size of two Euro coin and an silvery "coin" is
>in there (visible from the outside). The similarity of the shape
>of a coin and and a coin cell gave the latter its name.
>
>BUT!
>Dont pull that out before you got a new one!
>Most often these cells are lithium batteries, which name starts
>with CR...... . On my motherboard there is a CR2032. But this
>should be mentioned in the manual of your mitherboard (and if that
>get lost you will find a pdf of that on the net somewhere).
>
>If you got a new cell, shutdown the computer, remove the mains plug
>from the back and switch the PC on again (no joke). This will empty
>any capacitor in the mains adapter and on the board.
>
>Touch the metal case of the PC (or if it is plastic touch the outer
>shell of an USB jack (**NOT** the inside), where you can easily reach
>it (in most cases on the back of the PC instead of the front).
>This will discharge any static electricity. Otherwise grub and the
>coin cell become a minor problem... ;)
>
>Check the manual how to remove the BIOS coin cell. Do it carefully but
>do it not excessive slow.
>Insert the new battery (remove it from the package before you remove
>the old cell) as described in the manual.
>
>If you are quick enough chance are given that all settings of the BIOS
>will survive the short no-power situation.
>
>Boot the PC again. If you didnt configure ntp for your PC and the
>time/date of the PC didn't survive the short power fail of the coin cell swap,
>set the date by hand, emerge net-misc/ntp, configure it and run it by
>hand to set time/date correctly.
>
>If the PC does not boot: Install grub as Dale mentioned. A missing
>stage2 bootloader may be the reason, why grub hangs while looking for
>it. If the problem went away after installing grub (and with it a new
>stage2 bootlaoder) the missing stage2 bootloader is the first
>candidate for being the reason of the problem.
>
>Good luck!
>Best regards,
>Meino

SOLVED.

I bootstrap from Gentoo CD and run "grub-install" in change-root.
It fixed the problem, but it make me wonder why grub flipped on me.  I run upgrade on three other boxes and everything went smooth.
When I run upgrade on my main working server something happen and I can not figure it out.

-- 
Joseph