Ubuntu 14.04 External Monitor resolution adjustment

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Recently follow the prompts to update the system, installed more than 100 m of the installation package, the results of the system can not read the information on the display, the boot display vga-1:probed a monitor but no|invalid edid, I do not understand.

Later on the Internet to see some of the methods to change the resolution, summed up a bit.

Open Terminal input

Xrandr

Get the following information

Screen0: Minimum theX $, current2390X768, maximum8192X8192LVDS connected Primary 1366x768+1024x768+0(normal left inverted right x axis y axis) 309mm x 174mm 1366x76860.0*+ -0x720       59.91152x76859.81024x76859.9 the0x600        59.9848x48059.7 the0x480        59.7 -0x480        59.4HDMI-0disconnected (normal left inverted right x axis y axis) VGA-0Connected 1024x768+0+0(normal left inverted right x axis y axis) 0mm x 0mm 1024x76860.0* the0x600        60.3     56.2848x48060.0 -0x480        59.9  

Here Lvds is my laptop screen, the external monitor is VGA-0

The resolution of my external monitor is 1440x900, and the largest list is 1024x768, so I need to increase the resolution I need:

1440  the

The resulting output is as follows:

# 1440x90059.89155.93106.50"1440x900_60.00  "  106.50  144015281672 1904   the 903 909 934 -hsync +vsync

What's behind this modeline is what you need to add, and then add:

sudo xrandr--addmode vga-0"1440x900_60.00"

Finally change the display

sudo xrandr--output vga-0"1440x900_60.00"

Complete.

You may not be able to use the set resolution at each boot, using the following command:

sudo gedit ~/.profile

At the end of ~/.profile, add the command to modify the resolution:

1440  the  "1440x900_60.00"  106.50  1440 1528  16721904  903909934 -hsync +-- Addmode vga-0"1440x900_60.00"

Reference:

Setting a custom desktop resolution under Lubuntu,ubuntu

[Resolved] How is Ubuntu 14.04 resolution only 800*600 and 1024x768?

Ubuntu 14.04 External Monitor resolution adjustment