By default, UDOO Neo displays the graphical user interface on the micro-HDMI port. LVDS screens can be connected to the CN3 port. Before the screen can be used, it must be enabled as it follows. You cannot use the HDMI and the LVDS7 video outputs simultaneously.

7-inches LVDS panel

The 7-inches UDOO LVDS screen is compatible with UDOO Neo. If you previously bought one for the UDOO Quad/Dual, you just need to buy a new (smaller) cable and keep the same screen.

Switch video output from HDMI to LVDS

After you connect your LVDS screen to the CN3 connector, you must tell UDOO Neo to use the LVDS panel to draw the GUI. This can be done in several ways:

Option 1: you have an HDMI monitor and mouse/keyboard

If you have an HDMI screen connected to UDOO Neo, open a terminal with the link on the desktop. Then you can switch the main video output from HDMI to LVDS7 by typing:

sudo udooscreenctl set lvds7

(default password, if you did not change it, is udooer)

You can revert this change by typing:

sudo udooscreenctl set hdmi

If you want more info about the udooscreenctl command visit the Set Video Output. If you prefer a graphical simple way to change the default video output, it is provided by the UDOO Web Control Panel in the "Configuration"->"Advanced setting" section.

Option 2: you can connect via VNC or SSH

If you can connect to your board via VNC or via SSH (using the USB, WiFi or Ethernet connection) , you can follow the steps explained in the previous section.

Option 3: you have neither HDMI nor network

If you cannot connect to your board via the network (VNC or SSH) and you have no HDMI screen, you can enable the LVDS display port editing a file in the UDOO Neo SD card. Put the flashed SD card in your computer. If your computer has no SD card reader, you can connect the UDOO Neo to your computer via the micro-USB port.

A small FAT partition labelled boot will appear:

Open the file named uEnv.txt contained in the partition.

Heads up! The file must be saved with Unix-like line endings:

  • Windows users can use the free Notepad++ text editor to safely edit the file.
  • Mac OS X users can use the free TextWrangler text editor to safely edit the file.
  • Linux users can use their favourite text editor (gedit, vim, nano) without concerns.

Open the file and you will find this line:


Substitute the word hdmi with lvds7:


Save the file, eject the boot partition and restart the board.

This page was last updated on Thursday, September 14, 2017 at 10:48 AM.