I run GRUB Boot-loader with open SUSE 13.2.
I set timeout=0 at Boot-loader Options tab and Default Boot Section='Windows 7***'.
From then on, I couldn't see the GRUB menu to select which OS I want to boot
How do I get the boot menu back?
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Have you tried pressing ESC key before windows starts to boot? Just after POST.YoMismo– YoMismo2015-07-29 14:37:25 +00:00Commented Jul 29, 2015 at 14:37
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2Please accept the answer if it has solved your query. It'll be helpful for other with similar issuesneuron– neuron2015-08-05 03:02:39 +00:00Commented Aug 5, 2015 at 3:02
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3 Answers
Try holding down the Shift key just after POST
I got it working with these:
- In
/etc/default/grub, setGRUB_TIMEOUT=0 - In the same file, set
GRUB_TIMEOUT_STYLEtohiddenorcountdown. Don't set it tomenuas it uses a different loop that is not interruptible. - In theory, pressing SHIFT before booting the system should interrupt the boot process and show the GRUB menu. In practice, on some EFI systems the SHIFT keypress is not relayed to GRUB due to how the underlying firmware works. In those cases, press SHIFT+non-ASCII character (e.g. SHIFT+F1) before the boot process to get to the GRUB menu.
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320 years I've used GRUB. 20 years I've seen the advice to "just press shift" all over the internet. In 20 years on dozens of computers, I've never seen that advice actually work. Until today. Thank you!marcelm– marcelm2024-11-10 14:28:46 +00:00Commented Nov 10, 2024 at 14:28
If the above fails, it's quite easy (usually) to boot from any Linux live image (e.g., from a USB thumb drive), mount the /boot filesystem, and edit grub2/grub2.cfg on that to undo your change. For that you add
set timeout=10
to the very end of the file.
Do heed the warning at the beginning of the file, though — that file will get automatically overwritten, you will also have to change /etc/default/grub to undo the changes that led to timeout being 0. (But you can do that once you've normally booted your system).