So I repaired my screen resolution using xrandr, but it disappears after reboot. I don't know how to fix this thing and I couldn't find any recent tutorials that suit me, because I am missing all the .conf or .profile files needed.


The latest 15.04 has no file named xorg.conf , so you have to create it. It should be in /etc/X11 ,mine looks like this ,the system will boot with the desired settings.(you will have to adjust the file for it to work properly for you).

Section "Monitor" Identifier "HDMI2" Modeline "2560x1080" 230.00 2560 2720 2992 3424 1080 1083 1093 1120 -hsync +vsync Option "PreferredMode" "2560x1080" EndSection

Section "Screen" Identifier "Screen0" Monitor "HDMI2" DefaultDepth 24 SubSection "Display" Modes "2560x1080" EndSubSection EndSection

Section "Device" Identifier "Device0" Driver "intel" EndSection

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