@e1-531g
Xorg configuration is evolving from a monolithic xorg.conf to modular xorg.conf.d entries.
The advantage of xorg.conf.d entries is that it just overwrites a specific portion of the configuration file generated by xorg.
Nvidia graphics are curently poorly supported in OpenBSD and if your BIOS has the option I would try to disable.
You may then try fiddling with some of the intel video configuration options in
/etc/X11/xorg.conf.d/20-intel.conf
I found this
example for your laptop.
From the above web site:
Code:
Section "Device"
Identifier "IntelVideo"
Driver "intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection