Kernel Boot Problems

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IRQ Probe failed for hdc & hdd

Boot freezes at:

IRQ probe failed for hdc & hdd
hdc lost interrupt

This error occurs for some HD controllers under kernel 2.6.x. A workaround is to pass the acpi=off option to the kernel at boot time.

A different problem with similar effect has also been noticed. Apparently this is a problem with some hardware mixing with multiprocessor enabled kernels, and can be worked around by passing the nosmp option to the kernel.

References:


Unable to mount root

Boot freezes at:

VFS: unable to mount root device "hda3" bad or unknown-block (0:0)
Please append the correct "root=" option

With the newer kernel, you normally get a initrd image file that you should also configure in your grub config or lilo.conf. You get that file because most of the stuff is compiled as module and that's why you need the initrd file, it will load the required modules.

Here's a small example of how your grub config should look like:

#(0) Arch Linux
title  Arch Linux  [/boot/vmlinuz]
root   (hd0,0)
kernel /vmlinuz26 root=/dev/hda1 ro vga=792
initrd /kernel26.img 

References:

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