Hi Felix,
Thanks for your fast reply. From memory, I think the grub2 text menu
installed by firmware-9.6.0-amd64-netinst.iso became a grub command line
prompt after upgrading to testing.
1. For what possible reasons could have my grub menu disappeared?
2. You suggest I could boot Debian with "linux" and "initrd" commands. How could I determine which parameters to pass to these commands?
On Tue, 13 Nov 2018 at 01:14, Felix Miata <
mrmazda@earthlink.net> wrote:
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/
<div dir="ltr"><div class="gmail_quote"><br><br><div dir="ltr">Hi Felix,<div><br></div><div>Thanks for your fast reply. From memory, I think the grub2 text menu installed by firmware-9.6.0-amd64-netinst.iso became a grub command line prompt after
upgrading to testing.</div><div><br></div><div>1. For what possible reasons could have my grub menu disappeared?</div><div>2. You suggest I could boot Debian with "linux" and "initrd" commands. How could I determine which parameters
to pass to these commands?</div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, 13 Nov 2018 at 01:14, Felix Miata <<a href="mailto:
mrmazda@earthlink.net" target="_blank">
mrmazda@earthlink.net</a>> wrote:<br></div><blockquote class="gmail_
quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Shane Dev composed on 2018-11-12 22:25 (UTC+0100):<br>
> Hello, I downloaded firmware-9.6.0-amd64-netinst.iso and successfully<br> > installed a minimal debian stretch on my UEFI/GPT disk. After rebooting, I<br>
> was presented with the grub2 text user interface and the possibility to<br>
> boot Debian or my Windows boot manager - as expected.<br>
> Following <a href="
https://wiki.debian.org/DebianTesting" rel="noreferrer" target="_blank">
https://wiki.debian.org/DebianTesting</a>, I<br>
> edited /etc/apt/sources.list and changed stretch to testing, apt update &&<br>
> apt upgrade. Everything seemed ok but when I rebooted, the grub2 user<br> > interface was gone and I could not find a way to boot Debian. Any ideas?<br>
By "gone", do you mean an entirely black screen? Or, do you see a few lines<br>
of help text followed by a<br>
grub> _<br>
prompt? If the latter you can type in, along with tab completion, the commands<br>
to load "linux" and "initrd", just like a grub menu does for you, except you don't<br>
actually need everything the defaults usually provide, as any of it is necessary<br>
is included in the initrd. Those you need should be in your backup of grub.cfg.<br>
If you're getting nothing, try using your BIOS boot selection menu, which may<br>
have been poorly changed by the upgrade process to in inappropriate choice.<br> Without actually entering BIOS setup it could be F12, F8, F9 or a number of<br> other keystrokes that are firmware dependent.<br>
If you can't find your grub.cfg backup, use the following from one of mine as<br>
a template:<br>
load_video<br>
set gfxpayload=keep<br>
search --no-floppy --set=root --hint-baremetal=ahci0,gpt10 --label p10deb10<br>
linux /boot/vmlinuz root=LABEL=p10deb10 noresume<br>
initrd /boot/initrd<br>
-- <br>
Evolution as taught in public schools is religion, not science.<br>
Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!<br>
Felix Miata *** <a href="
http://fm.no-ip.com/" rel="noreferrer" target="_blank">
http://fm.no-ip.com/</a><br>
</blockquote></div>
</div></div>
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