Grub not detecting Fedora

[calimari0]

Just installed the theme and rebooted, and the grub is only detecting Windows (I dual boot Windows 10 and Fedora).

[vinceliuice]

Well, this is not a theme issue I think

[calimari0]

It did happen directly after installing the theme, though. Does the theme reset the grub settings or something?

[xjvs]

I also run into this issue, Fedora (f35 beta) doesn't show up in boot menu, only windows shows up. I'm not 100% sure about that this is caused by the theme, I'm trying to uninstall the theme but got:

[grub2-themes]$ sudo ./install.sh -r -t tela

 Checking for the existence of themes directory...

 tela grub theme not exist! 

[calimari0]

@xjvs https://ask.fedoraproject.org/t/grub-doesnt-detect-fedora-after-installing-a-grub-theme/17138?u=calimari this thread might help.

[calimari0]

@vinceliuice https://ask.fedoraproject.org/t/grub-doesnt-detect-fedora-after-installing-a-grub-theme/17138/26?u=calimari it did end up being a theme issue, please see this. There seem to be errors in the ./install.sh file. Thanks.

[xjvs]

@xjvs https://ask.fedoraproject.org/t/grub-doesnt-detect-fedora-after-installing-a-grub-theme/17138?u=calimari this thread might help.

Thank you for your quick reply, however the instructions in that thread don't work for me, at this moment I have to boot up my fedora by manual for every boot. I'm providing my steps for your reference:

1. At grub boot menu, press "c" to grub command line prompt.
2. type ls, you will be able to see all disk partitions.

   grub> ls
   hd2,gpt1 hd2,gpt2 ...

3. Try to find your boot and root partitions by checking the entries one by one, for example, my root partition is on (hd2,gpt2). so I will be able to see root dir under (hd2,gpt2):

   grub> ls (hd2,gpt6)/
   root/

4. Now you will be able to check the grub config file in your fedora os, check the kernel opts in grub config. For me, it's something like:

   grub> cat (hd2,gpt6)/root/etc/grub2.cfg
   ...
   set kernelopts="root=UUID=.... ro rootflags=subvol=root"
   ...

5. Now you are able to boot up the system with linux and initrd and boot commands in grub command line:

   grub> linux (hd2,gpt6)/root/boot/vmlinuz-5.xxxxx root=UUID=xxx ro rootflags=subvol=root
   grub> initrd (hd2,gpt6)/root/boot/initfs-5.xxxxxxx
   grub> boot

   Depends on your fedora setup, the instructions could be different. Now you should be able to enter your fedora system, and there will be more possibilities to recover grub entries, though I haven't figure out a solution.

[calimari0]

@xjvs https://ask.fedoraproject.org/t/grub-doesnt-detect-fedora-after-installing-a-grub-theme/17138?u=calimari this thread might help.

Thank you for your quick reply, however the instructions in that thread don't work for me, at this moment I have to boot up my fedora by manual for every boot. I'm providing my steps for your reference:

1. At grub boot menu, press "c" to grub command line prompt.
2. type ls, you will be able to see all disk partitions.

   grub> ls
   hd2,gpt1 hd2,gpt2 ...

3. Try to find your boot and root partitions by checking the entries one by one, for example, my root partition is on (hd2,gpt2). so I will be able to see root dir under (hd2,gpt2):

   grub> ls (hd2,gpt6)/
   root/

4. Now you will be able to check the grub config file in your fedora os, check the kernel opts in grub config. For me, it's something like:

   grub> cat (hd2,gpt6)/root/etc/grub2.cfg
   ...
   set kernelopts="root=UUID=.... ro rootflags=subvol=root"
   ...

5. Now you are able to boot up the system with linux and initrd and boot commands in grub command line:

   grub> linux (hd2,gpt6)/root/boot/vmlinuz-5.xxxxx root=UUID=xxx ro rootflags=subvol=root
   grub> initrd (hd2,gpt6)/root/boot/initfs-5.xxxxxxx
   grub> boot

   Depends on your fedora setup, the instructions could be different. Now you should be able to enter your fedora system, and there will be more possibilities to recover grub entries, though I haven't figure out a solution.

Oh, so that's how it's done. I couldn't boot into my Fedora system at all, and reinstalled my system. Maybe you could try asking in that thread? I'm by no means an expert at this.

[vinceliuice]

Fedora 34 places the grub.cfg file at /boot/grub2/grub.cfg now, I'll update the install.sh file