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Add 2560×1440 resolution for Dell U2713H monitor under Ubuntu 13.04 connected over HDMI

This post describes how to configure Ubuntu 13.04 for a Dell U2713H monitor with a 2560x1440 resolution. It also works for Ubuntu 13.10.

Open a terminal and execute.

cvt 2560 1440 60

The resulting output on the console is needed to create a new monitor resolution setting and might look like the following.

sven@c:~$ cvt 2560 1440 60
# 2560x1440 59.96 Hz (CVT 3.69M9) hsync: 89.52 kHz; pclk: 312.25 MHz
Modeline "2560x1440_60.00"  312.25  2560 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync

Create a new file /usr/share/dell-u2713h.sh with the following content.

xrandr --newmode 2560x1440 312.25  2560 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync
xrandr --addmode HDMI2 2560x1440

Make the file executable.

sudo chmod +x /usr/share/dell-u2713h.sh

The last step is to add the following line to the end of the file /etc/lightdm/lightdm.conf

session-setup-script=/usr/share/dell-u2713h.sh

Date published:
Date modified: 2013-09-23
Keywords: Trench, hdmi, resolution, ubuntu