KISSmyOS, 1 year ago (edited 1 year ago)

By default, your grub menu should show up every time you boot.
If it doesn’t, boot your PC and do:
sudo nano /etc/default/grub
You need these lines:
GRUB_TIMEOUT=10
GRUB_TIMEOUT_STYLE=menu

Every line starting with:
GRUB_HIDDEN_TIMEOUT
should be commented out like so:
#GRUB_HIDDEN_TIMEOUT

Then run sudo update-grub and reboot.

What this does:

• sets a countdown of 10 seconds before grub boots the kernel
• tells grub to show the boot menu during that countdown
• doesn’t use a hidden countdown that waits for a button press to show the menu

In the grub menu, select advanced options and there you should be able to select an older kernel to boot.