If modesetting driver does not load automatically in some computers, then can make an /etc/X11/xorg.conf file which contents is
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 31.5-67
VertRefresh 50-75
EndSection
Section "Modes"
Identifier "Modes0"
EndSection
Section "Device"
Identifier "Card0"
Driver "modesetting" #card0driver
EndSection