drivers/gpu/vga/Kconfig

   1 config VGA_ARB
   2         bool "VGA Arbitration" if EMBEDDED
   3         default y
   4         depends on PCI
   5         help
   6           Some "legacy" VGA devices implemented on PCI typically have the same
   7           hard-decoded addresses as they did on ISA. When multiple PCI devices
   8           are accessed at same time they need some kind of coordination. Please
   9           see Documentation/vgaarbiter.txt for more details. Select this to
  10           enable VGA arbiter.
  11
  12 config VGA_SWITCHEROO
  13         bool "Laptop Hybrid Grapics - GPU switching support"
  14         depends on X86
  15         depends on ACPI
  16         help
  17           Many laptops released in 2008/9/10 have two gpus with a multiplxer
  18           to switch between them. This adds support for dynamic switching when
  19           X isn't running and delayed switching until the next logoff. This
  20           features is called hybrid graphics, ATI PowerXpress, and Nvidia
  21           HybridPower.
  22