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Re: grub2 user interface disappears after upgrade from stretch to testing

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From	Felix Miata <mrmazda@earthlink.net>
Newsgroups	linux.debian.devel.testing
Subject	Re: grub2 user interface disappears after upgrade from stretch to testing
Date	Tue, 13 Nov 2018 01:20:01 +0100
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Shane Dev composed on 2018-11-12 22:25 (UTC+0100):

> Hello, I downloaded firmware-9.6.0-amd64-netinst.iso and successfully
> installed a minimal debian stretch on my UEFI/GPT disk. After rebooting, I
> was presented with the grub2 text user interface and the possibility to
> boot Debian or my Windows boot manager - as expected.

> Following https://wiki.debian.org/DebianTesting, I
> edited /etc/apt/sources.list and changed stretch to testing, apt update &&
> apt upgrade. Everything seemed ok but when I rebooted, the grub2 user
> interface was gone and I could not find a way to boot Debian. Any ideas?

By "gone", do you mean an entirely black screen? Or, do you see a few lines
of help text followed by a

	grub> _

prompt? If the latter you can type in, along with tab completion, the commands
to load "linux" and "initrd", just like a grub menu does for you, except you don't
actually need everything the defaults usually provide, as any of it is necessary
is included in the initrd. Those you need should be in your backup of grub.cfg.

If you're getting nothing, try using your BIOS boot selection menu, which may
have been poorly changed by the upgrade process to in inappropriate choice.
Without actually entering BIOS setup it could be F12, F8, F9 or a number of
other keystrokes that are firmware dependent.

If you can't find your grub.cfg backup, use the following from one of mine as
a template:

	load_video
	set gfxpayload=keep
	search --no-floppy --set=root --hint-baremetal=ahci0,gpt10 --label p10deb10
	linux	/boot/vmlinuz root=LABEL=p10deb10 noresume
	initrd	/boot/initrd
-- 
Evolution as taught in public schools is religion, not science.

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

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Thread

grub2 user interface disappears after upgrade from stretch to testing Shane Dev <devshane42@gmail.com> - 2018-11-12 22:30 +0100
  Re: grub2 user interface disappears after upgrade from stretch to  testing Felix Miata <mrmazda@earthlink.net> - 2018-11-13 01:20 +0100
    Fwd: grub2 user interface disappears after upgrade from stretch to testing Shane Dev <devshane42@gmail.com> - 2018-11-13 06:50 +0100
    Re: grub2 user interface disappears after upgrade from stretch to  testing Felix Miata <mrmazda@earthlink.net> - 2018-11-13 07:00 +0100
      Re: grub2 user interface disappears after upgrade from stretch to testing Shane Dev <devshane42@gmail.com> - 2018-11-14 08:00 +0100

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