Second monitor not recognized - xorg.conf file

I'm trying to use this monitor Acer XB270H, with my Ubuntu laptop, but it is not recognized, appears cropped with incorrect resolution. *Note: I first was using the docking station with the monitor DP cable, and bought a mini DP to DP cable to be able to plug directly the computer to the monitor instead : but no change, it was not a hardware problem.* I tried to force a new configuration with xrandr : cvt 1920 1080 : # 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync

xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
xrandr --addmode DP1 "1920x1080_60.00"

**Here what shows up :** gsd-color: unable to get EDID for xrandr-DP1: unable to get EDID for output So, following command turns the second monitor black showing 'no signal' :

xrandr --output DP1 --mode 1920x1080_60.00

--- **SPECS** Linux 4.18.0-13-generic #14-Ubuntu SMP x86_64 GNU/Linux lspci -v | grep VGA : 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller])

inxi -Gxx :

Graphics: Device-1: Intel 3rd Gen Core processor Graphics driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0166 Display: x11 server: X.Org 1.20.1 driver: i915 compositor: gnome-shell resolution: 1366x768~60Hz, 1024x768~60Hz OpenGL: renderer: Mesa DRI Intel Ivybridge Mobile v: 4.2 Mesa 18.2.2 compat-v: 3.0 direct render: Yes

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**UPDATE :**

I'm now trying to use a xorg.conf file as proposed.

To get the EDID I could not use read-edid, parse-edid : /sys/class/drm/card0-DP1/edid : Partial Read... Try again..., and could not find it on Internet.

I finally managed to get the EDID (256-bits) file from **Windows** with moninfo.exe tool :

ls -al /etc/X11/edid.bin -rwxr----- 1 root root 256 Feb 3 14:00 /etc/X11/edid.bin ``` I tried to follow some Xorg guides, but this error came up too many times : gsd-color: failed to get edid: unable to get EDID for output