#!/bin/bash

# Author:  Interbird, interbird1964 at gmail.com
# Version: 20071107 #3

# DISCLAIMER: ## If this script kills your cat then *you and only you* are responsible for that. ##
              ## In no way am I responsible for any damage caused by this script.                ##
# WARNING:    ## Before you run this script, do a cp -a /boot /boot.backup as root.              ##
# WARNING:    ## Be sure to have at least 30MB free in /boot.                                    ##

# This script tries to fix the quirk that seems to be in the gutsy initramfs code.
# It does this by modifying the initrd.img image.
# Make sure you have at least 30MB of free space in /boot.
# Note that this hack is not a proper solution.
# Make sure long lines are not wrapped when you paste this script in your editor.
# This script uses sed.

# USAGE: Put this script anywhere you want.
#        Make it executable with: chmod +x fix-gutsy-initramfs
#        Then run: sudo ./fix-gutsy-initramfs
#        After the script is done, make sure the new initrd.img is present in the /boot directory.
#        Reboot your computer.
#        Kernel log-lines should now appear after a few seconds.
#        If you put fbcon and vesafb in /etc/modules you can remove them because they are now loaded in the initrd image.

# I hope this script works for you.
# If you have trouble using it you can mail me at the above address.



# We need sed, so lets make sure it is installed.
apt-get install sed

# Enter the directory where the initrd image resides.
pushd /boot

# Get the version of the running kernel.
kv="$(uname -r)"

# Compose the filename of the initrd image.
initrd_img="initrd.img-$kv"

# This is the name of the temporary directory we use to extract the initrd image.
tmpdir="tmp-initrd"

# The framebuffer driver we want loaded.
# This driver should work on any vesa 2.0 compliant videocard.
fbdriver="vesafb"

# First we make a backup of the current initrd image.
cp -a $initrd_img $initrd_img.backup

# Remove the temporary directory if it exists so this script can be run from scratch more than once.
rm -rf $tmpdir

# Create the temprary directory
mkdir -p $tmpdir

# Unzip the current initrd image to the temporary directory.
gzip -cd $initrd_img > $tmpdir/$initrd_img

# Enter the temporary directory.
pushd $tmpdir

# Unpack the initrd image.
cpio -i < $initrd_img

# Remove the unpacked initrd image to prevent it from being included in the new initrd image. 
rm $initrd_img

# Enter the directory where the blacklist files are.
pushd etc/modprobe.d

# Make a backup.
cp -a blacklist-framebuffer blacklist-framebuffer.backup

# Unblacklist the framebuffer module.
cat blacklist-framebuffer.backup | sed -e 's/^.*blacklist '$fbdriver'/#blacklist '$fbdriver'/' > blacklist-framebuffer

# Back to temporary directory.
popd

# Now one would think that this would be enough but it seems it still does not load.
# So, we change a script too to make the modules load unconditionally.

# Enter boot-scripts directory.
pushd scripts/init-top

# We don't want duplicate lines, so remove them if they are present present.
cat framebuffer | sed -e '/modprobe fbcon/d;/modprobe '$fbdriver'/d' > framebuffer.tmp

# Now add the modules to the end of the script so they will be loaded unconditionally.
echo "modprobe fbcon"  >> framebuffer.tmp
echo "modprobe $fbdriver" >> framebuffer.tmp

# Rename the script to its original name.
mv -f framebuffer.tmp framebuffer

# Make it executable again.
chmod +x framebuffer

# Back to temporary directory.
popd

# Now create a new initrd image and put it in the parent directory which is /boot.
# This overwrites the bad one.
find . | cpio -V -H newc -o | gzip -9 > ../$initrd_img

# Back to /boot directory
popd

# Cleanup the temporary directory.
rm -rf $tmpdir

# Back to wherever this scripts was called from.
popd