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Unable to multiboot Fedora 25 with Windows 10

asked 2017-06-19 07:45:26 +0000

Jo gravatar image


I'm trying to install Fedora 25 workstation in my Windows 10 laptop. I have made a bootable USB using the live image and during the installation process, when I try to configure partitions, it is giving me errors.

If I try to create the root partition first with any available size, it shows only 1024 KB after creation. But, other partitions are showing the correct size.

If I somehow correct it by creating another partition,say, "var" first, only var will show 1024KB and I can then create my root partition with desired size. Once I create root partition, I'll delete the var partition. But, it will show another error once I click 'Done' and the error is:

++++++++++++ no valid bootloader target device found For a UEFI installation, you must include an EFI System Partition on a GPT-formatted disk, mounted at /boot/efi. ++++++++++++

For your info, my Windows is currently installed in Legacy BIOS mode and I'm booting the USB in Legacy mode.

Please assist me with this.

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I have disabled secure boot and the Legacy mode was already enabled in my bios. I'm not sure about the CSM as I couldn't find it anywhere.

Jo ( 2017-06-20 19:25:32 +0000 )edit

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answered 2017-06-20 18:51:02 +0000

Samuel Sieb gravatar image

How do you have Windows 10 installed in legacy mode? It sounds like your hard drive is formatted as GPT so the installer is expecting an EFI setup. To verify whether you are in EFI mode or legacy, see if there is a /sys/firmware/efi directory.

I don't know about the 1024KB partition size, how much free space is there? What happens if you let it automatically create the partitions?

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From the System Information, I can confirm that my Windows 10 is installed in Legacy.


Regarding your other query, the result is as follows:

~]# [ -d /sys/firmware/efi ] && echo UEFI || echo Legacy

~]# Legacy

~]# sudo gdisk -l /dev/sda

~]# Partition table scan: MBR: MBR only BSD: not present ASD: not present GPT: not present

Also, I have ~50GB of unallocated space and the same error occurs while I try to create partitions automatically.

So please help me out with this.

Jo ( 2017-06-20 19:22:55 +0000 )edit

50GB is pretty small. I have no idea why the installer is complaining about EFI and GPT though. Maybe file a bug? You could also try the F26 Beta installer and see if it works any better.

There should be logs from Anaconda stored in /tmp. You could take a look through those and see if you can see anything useful there. If you do file a bug, you will most likely be asked for those.

Samuel Sieb ( 2017-06-20 19:51:15 +0000 )edit

I have tried Fedora 26 and still get the same error.

Also, when I click automatic partition firstly, it shows an error that I have 0MB of free space although the disk which I choose shows 50GB of unallocated space under it. If I go with custom partitioning and, click either automatic partition or custom one from that page, I get the error which I mentioned initially(no valid bootloader target device found ). Sorry for not showing the screenshots.

Please help me out with this. Any help would be appreciated.

Jo ( 2017-06-21 19:01:00 +0000 )edit

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Asked: 2017-06-19 07:45:26 +0000

Seen: 70 times

Last updated: Jun 20