I915
i915 is a kernel module:
a xorg.conf could look something like this:
Section "Device" ### Available Driver options are:- ### Values: <i>: integer, <f>: float, <bool>: "True"/"False", ### <string>: "String", <freq>: "<f> Hz/kHz/MHz", ### <percent>: "<f>%" ### [arg]: arg optional Option "DRI" "true" # [<bool>] Option "ColorKey" # <i> Option "VideoKey" # <i> Option "FallbackDebug" "false" # [<bool>] Option "Tiling" "true" # [<bool>] Option "LinearFramebuffer" "true" # [<bool>] Option "Shadow" "false" # [<bool>] Option "SwapbuffersWait" "false" # [<bool>] Option "TripleBuffer" "false" # [<bool>] Option "XvMC" # [<bool>] Option "XvPreferOverlay" # [<bool>] Option "DebugFlushBatches" "false" # [<bool>] Option "DebugFlushCaches" "false" # [<bool>] Option "DebugWait" "false" # [<bool>] # Option "HotPlug" "true" # [<bool>] Option "RelaxedFencing" "false" # [<bool>] Option "BufferCache" "true" # [<bool>] Option "Throttle" "false" Identifier "Card0" Driver "intel" BusID "PCI:0:2:0" EndSection More info can be found in intel(9)