I'm running into some serious issues with Grub on my Debian setup where it doesn't seem to detect Windows at all. I've already tried running os-prober and updating Grub, but no luck so far. Also, I'm having trouble with the setting in /etc/default/grub; whenever I try to uncomment "GRUB_DISABLE_OS_PROBER=false", it just reappears as if I never changed it. More concerning, when I run apt update, I get a bunch of error messages, including syntax errors in the generated Grub config file and a warning about os-prober not being executed. It's throwing off my whole setup and halting the updates. Has anyone faced similar issues or have ideas on how to fix this?
4 Answers
You're not alone in this! Grub can be tricky sometimes. Make sure you have the required permissions (using sudo) to make those changes persist. Sometimes a subtle permission issue can cause settings to revert. After that, it's just a matter of `update-grub` to apply any changes you made.
Don't forget to double-check if you've modified anything in `/etc/grub.d/`. If you have, it's possible those modifications are causing your issues. It’s also worth a shot to restore those files from your backups if you're not sure what went wrong.
It sounds like there's a syntax error in your Grub configuration. The error message mentions a specific problem at line 250, so you should check that area closely. Also, make sure to look over the entire `/etc/default/grub` and `/etc/grub.d/*` for any typos or misplaced settings. That's often where issues pop up!
You might have made an accidental change that messed up your Grub. In a dual boot setup, it's usually pretty straightforward: just uncomment the os-prober in `/etc/default/grub`, run the commands `sudo update-grub` and `sudo grub-install` on your drive. If that still doesn't help, consider reinstalling the Grub package altogether. That might clear up any corruption.
I checked those files, but I wasn't able to find anything wrong. It's really puzzling!