Algunas resoluciones
cvt 1920 1080
cvt 1368 768
Entramos en 10-monitor.conf
sudo mousepad /etc/X11/xorg.conf.d/10-monitor.conf
Y configuramos
Section "Monitor"
Identifier "VGA1"
Modeline "1280x1024" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync
Option "PreferredMode" "1280x1024"
EndSection
Section "Screen"
Identifier "Screen0"
Monitor "VGA1"
DefaultDepth 24
SubSection "Display"
Modes "1280x1024"
EndSubSection
EndSection
Section "Device"
Identifier "Device0"
Driver "intel"
EndSection
Pagina del wiki Arch Intel: Adding undetected resolutions