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Zero/hardware/display

< Zero‎ | hardware
    Radxa Zero >  Hardware >  Display

Display on Radxa Zero

This guide describes how to use display on Radxa Zero.

HDMI Display

Most HDMI display works out of the box.

Specify HDMI Resolution (For example: 1280x720)

Here default resolution is 1920x1080. Now we change it to 1280x720.

Step 1: Check supported resolution.

rock@radxa-zero:~$ xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 3840 x 2160
HDMI-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
   1920x1080     60.00*   50.00    59.94  
   1920x1080i    60.00    50.00    59.94  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x960      60.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    72.81    66.67

Step 2: Get 1280x720 modeline

rock@radxa-zero:~$ cvt 1280 720
# 1280x720 59.86 Hz (CVT 0.92M9) hsync: 44.77 kHz; pclk: 74.50 MHz
Modeline "1280x720_60.00"   74.50  1280 1344 1472 1664  720 723 728 748 -hsync +vsync

Step 3: Create file /etc/X11/xorg.conf.d/20-modesetting.conf including the following content. We get modeline in step 2.

rock@radxa-zero:~$ cat /etc/X11/xorg.conf.d/20-modesetting.conf 
Section "Monitor" 
        Identifier "HDMI-1" 
        Modeline "1280x720_60.00"   74.50  1280 1344 1472 1664  720 723 728 748 -hsync +vsync
        Option "PreferredMode" "1280x720_60.00"
EndSection

Step 4: Reboot Radxa Zero and check the resolution.

rock@radxa-zero:~$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 720, maximum 3840 x 2160
HDMI-1 connected primary 1280x720+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
   1280x720_60.00  59.86*+
   1920x1080     60.00    50.00    59.94  
   1920x1080i    60.00    50.00    59.94  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x960      60.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    72.81    66.67

Great. Now the resolution is 1280x720.