config.txt

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# pretend all audio formats unsupported by display, forcing analog output instead.
#hdmi_ignore_edid_audio=1

# force output to HDMI for users who plug the HDMI screen after boot
#hdmi_force_hotplug=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan#
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=800
#framebuffer_height=600

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

# enable sound
dtparam=audio=on

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# increase if you get problems with graphics intensive apps
gpu_mem=128

# Uncomment this line to set the HDMI as the primary display
# You might need this flag if using RaspberryPI touch screen
#display_default_lcd=0

# for more options see http://elinux.org/RPi_config.txt