It’s a popular hobbyist tool that is generally purchased to run all kinds of software experiments on. Sudo cp /boot/config.txt /boot/ Raspberry Pi is a popular and inexpensive device that comes in many shapes and forms. "CEA" corresponds to hdmi_group=1 "DMT" corresponds to hdmi_group=2 The value inside () corresponds to hdmi_mode.įrom the above result: hdmi_group=1 hdmi_mode=16 HDMI:EDID preferred mode remained as CEA (16) 1920x1080p 60 Hz with pixel clock 148 MHz HDMI:EDID CEA mode (34) 1920x1080p 30 Hz with pixel clock 74 MHz has a score of 149416 HDMI:EDID CEA mode (32) 1920x1080p 24 Hz with pixel clock 74 MHz has a score of 124532 HDMI:EDID CEA mode (31) 1920x1080p 50 Hz with pixel clock 148 MHz has a score of 4232360 HDMI:EDID best score mode is now CEA (16) 1920x1080p 60 Hz with pixel clock 148 MHz (score 5398248) HDMI:EDID found CEA format: code 34, 1920x1080p 30Hz HDMI:EDID found CEA format: code 32, 1920x1080p 24Hz HDMI:EDID found CEA format: code 16, 1920x1080p 60Hz HDMI:EDID found CEA format: code 31, 1920x1080p 50Hz HDMI:EDID found CEA detail timing format: 1920x1080p 50 Hz (31) HDMI:EDID found preferred CEA detail timing format: 1920x1080p 60 Hz (16) For example if you are checking for 1080p resolution Grep the desired resolution to check if it is available.Pipe the file to edidparser to generate a readable text file.Run the tvservice command to output the result to a file.However if it says "Unable to get monitor information", find out the modes supported by your monitor by running tvservice command and set the correct mode in /boot/config.txt as below Try to change monitor settings from Preferences → Monitor settings Overscan_bottom=30 The resolution and HDMI modes are not the best values for your screen This means you need positive overscan values. Picture spills off the size of the screen and some parts of the picture are outside the screen Centre the display by trying different values for feft, right, top, bottom. More negative values means less black borders. However if your display stil has some overscan you may need to keep the overscan parameters in config.txt file, but adjust the values: On most monitors/TVs this would remove the black borders and make the desktop fill the whole screen. Uncomment the #disable_overscan=1 (Remove the #).Take a backup of the file /boot/config.txt.This can be done by setting the parameter disable_overscan to 1 in /boot/config.txt and commenting other parameters related to overscan. If this doesn't remove the black borders, then try disabling overscan on the Pi. Eg: On a Sony Bravia TV these settings are under Screen Format (Normal, Zoom, Wide Zoom etc.,). Modern TVs and monitors don't need overscan and hence disabling overscan altogether can make the Pi graphics fill the entire screen.Ĭheck the settings on the TV or monitor first. This is possibly because Pi is adding overscan to the signal. Picture doesn't fill the entire size of the screen and you can see black borders on left, right, top, bottom or all sides. This article explains how to set the correct display resolution on Raspberry Pi. The resolution and HDMI modes are not the best values for your screen.Picture spills off the size of the screen and some parts of the picture are outside the screen.Picture doesn't fill the entire size of the screen and you can see black borders on left, right, top, bottom or all sides.But it might get this wrong and you may come across various problems with display such as : When you connect your raspberry pi to your TV or monitor via HDMI, Pi attempts to guess the resolution, hdmi mode, overscan values etc., that best fits your display.
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