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Lucas Pottersky
Asked: 2010-10-31 10:54:24 +0800 CST

Kernel panic: unable to mount root fs after building mainline kernel

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Similar problem as reported by another user. While booting, the system can't find /dev/sda1 and so a "kernel panic: unable to mount root fs on unknown-block (0,0)" appears on screen.

I'm compiled & built kernel linux-2.6.32.25 on Ubuntu 10.04 running in VirtualBox virtual machine.

ps.: The update-initramfs, update-grub didn't work out for me.

10.04 compiling kernel build

2 Answers

  1. I decided to re-build the kernel using make-dpkg as mentioned in the Ubuntu wiki.

    sudo make-kpkg buildpackage --initrd kernel-image kernel-headers

    I generated the kernel-image with:

    sudo make bzImage

    If I recall well, on a PC this will output vimlinuz to: /usr/src/[your_linux_source_tree]/arch/x86/build

    The headers I used were downloaded from kernel.ubuntu.com/~kernel-ppa/mainline/

    Finally I did the update-initramfs, update-grub trick.

    Grub screen not showing up? Here's the answer

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  2. Try 

    sudo update-initramfs -u -k all
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