Ubuntu – USB installer: “ Initramfs unpacking failed: Decoding failed”

20.04bootdual-bootinitramfsusb

I am currently trying to install Ubuntu as a Dual boot to my Windows.

I have created a USB-installer using Rufus and the downlodable iso from Ubuntu's own website.

However, when I boot my computer with the USB, and select Ubuntu through the grub loader, I am stuck with the error: “Initramfs unpacking failed: Decoding failed”, while some of my screen is flickering.

I have afterwards tried to boot my laptop using the same bootable USB, and are not met with the error on the laptop.

Does anyone know how i should proceed? Or have anyone also encountered this?

Best Answer

  • It's kind of a bogus error, unless you can't fully boot into Ubuntu.

    Either boot into Ubuntu, or into Recovery Mode from the GRUB menu...

    • GRUB menu
      • Additional Options
        • Recovery Mode
          • Root Access

    ...and type the following commands. This will rebuild the (possibly) broken ramdisk file.

    sudo update-initramfs -c -k $(uname -r)

    reboot

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