Linux Grub issue
Linux Grub issue
I tried a dual boot setup and everything functioned smoothly until the update process for Ubuntu prompted about Grub. I decided to proceed with the update, but it caused many issues and required a full reinstall of Windows. I’m wondering if I should skip updating Grub now. My Linux installation was based on Ubuntu 16.04.4 LTS, which I upgraded to 18.04 LTS after four days. The update asked about a Grub update—what should I do to prevent this from happening again?
It asked for clarification on your request and then proceeded to respond. After you confirmed, I provided the next steps in the conversation.
It seems the system prompted whether you wanted to keep the current Grub setup. You had two choices: stick with the existing configuration or customize it. One option mentioned updating Grub to the latest version, which you did. After the update, it worked until a restart triggered Grub Rescue, showing no partition was found. You were able to boot into Linux or Windows, and you confirmed the update was successful.
It's possible the update removed grub's setup file. You can manually create a configuration with grub-mkconfig -o /boot/grub/grub.cfg. If Windows isn't listed in grub afterward, try using os prober and restart. Generally, no major problems should occur if grub remains unchanged; just ensure you don't update grub if it's not necessary.
You could have simply used a recovery CD instead of reinstalling Windows. It's odd, though—did you really use some unusual grub installer? There are many grub rescue disks available; just search online.