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[solved] correct way to upgrade grub?
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h0mer`-
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PostPosted: Wed May 09, 2018 9:56 am    Post subject: [solved] correct way to upgrade grub? Reply with quote

i have grub 2.00 on my current system. i want to use the microcode feature of the newest grub v 2.02-r1.

what is the correct way to upgrade grub in that case?

i am asking because updating the package still shows grub 2.00 in boot menu.
so i tried reinstalling it to /dev/sda - boot menu shows correct version 2.02 but gets stuck in grub shell.


Last edited by h0mer`- on Fri May 11, 2018 9:05 am; edited 1 time in total
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DONAHUE
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Joined: 09 Dec 2006
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PostPosted: Wed May 09, 2018 3:12 pm    Post subject: Reply with quote

"but gets stuck in grub shell."
means it can't find or can't read grub.cfg
booting in UEFI mode? booting in Legacy BIOS mode? not a UEFI motherboard?
what exact command did you issue when reinstalling grub?
If using a separate boot partition, was it mounted when the grub reinstall command was issued?
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h0mer`-
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PostPosted: Thu May 10, 2018 10:01 am    Post subject: Reply with quote

boot partition was mounted
legacy bios mode in a vm

grub-install /dev/sda
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DONAHUE
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PostPosted: Thu May 10, 2018 11:57 am    Post subject: Reply with quote

Does grub.cfg exist in the location where grub expects to find it?
boot system rescue cd/usb, mount the gentoo partitions; nominally:
Code:
mount /dev/sda4 /mnt/gentoo
ls -lR /mnt/gentoo/boot | wgetpaste -t
mount /dev/sda2 /mnt/gentoo/boot
ls -lR /mnt/gentoo/boot | wgetpaste -t
if your root partition is not /dev/sda4 and/or your boot partition is not /dev/sda2 substitute your values. Post the url's returned here.
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Jaglover
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PostPosted: Thu May 10, 2018 1:08 pm    Post subject: Reply with quote

You want to use microcode update in a virtual machine? 8O
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h0mer`-
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PostPosted: Fri May 11, 2018 9:05 am    Post subject: Reply with quote

it works now and i have no idea what i did wrong.

i marked the thread as solved - thanks for your help.
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