#!/bin/bash
# Rename this script to i915.sh and make it executable ( chmod +x i915.sh ) 
# 
# This script will load the i915 driver in the 3.2.6 kernel
# for Backtrack 5 R2 without adding unsupported PPA's.
# Adding unsupported PPAs to any Backtrack Distro is considered
# an unacceptable practice that could compromise the stability and 
# more importantly, security of your operating system.

# Script Author: Landon Mayo
# E-Mail landon.mayo[at]OWASP[dot]org
# License: GNU General Public Ver. 2 (the ``GPL``).
# Version 1.1
# A big thanks goes to James2k for his guide on this:
# Guide URL: backtrack-linux.org/forums/showthread.php?t=48904
# This should get your startx up and running, but you must read his guide
# to ensure everything is running properly.

#***Make sure X Server is not running. Execute in console only***#

#rename the xorg.conf to xorg.conf.bak so X no longer will use the config

mv /etc/X11/xorg.conf /etc/X11/xorg.conf.bak
echo ">> Don't worry if this throws an error" 
echo ""

echo ">> blacklisting nouveau to keep it from loading permanently"
echo "blacklist nouveau" >> /etc/modprobe.d/blacklist.conf 
echo ">> done"

echo ">> Updating the initramfs of the newest kernel:"
update-initramfs -u
echo ">> done"

# changing to grub's directory

cd /etc/default

echo ">> backing up orginal grub to grub.bak"
cp grub grub.bak
echo ">> done"
# Replacing: Orginal String: GRUB_CMDLINE_LINUX_DEFAULT="text splash vga=791"
# With: GRUB_CMDLINE_LINUX_DEFAULT="text video=i915:modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 pcie_aspm=force"
echo ">> Now editing grub"
sed -i -e 's/"text splash vga=791"/"text video=i915:modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 pcie_aspm=force"/g' `find . -iname 'grub'`
# This will do the same as above but only if you ran version 1.0 of this script.
sed -i -e 's/"text i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 pcie_aspm=force"/"text video=i915:modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 pcie_aspm=force"/g' `find . -iname 'grub'`
# running update-grub to finalize our change
echo ">> invoking "update-grub""
update-grub
echo ">> done"
echo ">> rebooting... startx should now work."
echo ">> If you run into any issues visit http://www.backtrack-linux.org/forums/showthread.php?t=48904"
shutdown -r now