Making the Karmic xsplash/gdm not suck
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# Replace the brown background image
# (fill with black in GIMP)
sudo apt-get build-dep xsplash
apt-get source ubuntu-xsplash-artwork
cd xsplash-0.8.5/images
gimp bg_2560x1600.jpg
dpkg-buildpackage -rfakeroot -b
cd ..
sudo dpkg -i ubuntu-xsplash-artwork_*.deb


# Fix the brown-ish bg color in the theme
# (the "sed" command makes it grayscale)
sudo apt-get build-dep human-theme
apt-get source human-theme
cd human-theme-0.37
sed -i -e 's/191313/191919/g' HumanLogin/gtk-2.0/gtkrc
dpkg-buildpackage -rfakeroot -b
cd ..
sudo dpkg -i human-theme_*.deb


# Make the sound theme silent
# (by replacing them with 1s silence)
sudo apt-get install vorbis-tools
sudo apt-get build-dep ubuntu-sounds
apt-get source ubuntu-sounds
cd ubuntu-sounds-0.12/ubuntu/stereo
dd if=/dev/zero of=silence.pcm bs=176400 count=1
oggenc -r silence.pcm
for file in *.ogg; do cp silence.ogg $file; done
rm silence.{ogg,pcm}
cd ../..
dpkg-buildpackage -rfakeroot -b
cd ..
sudo dpkg -i ubuntu-sounds_*.deb