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Linux/drivers/gpu/vga/Kconfig

  1 config VGA_ARB
  2         bool "VGA Arbitration" if EXPERT
  3         default y
  4         depends on (PCI && !S390)
  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_ARB_MAX_GPUS
 13         int "Maximum number of GPUs"
 14         default 16
 15         depends on VGA_ARB
 16         help
 17           Reserves space in the kernel to maintain resource locking for
 18           multiple GPUS.  The overhead for each GPU is very small.
 19 
 20 config VGA_SWITCHEROO
 21         bool "Laptop Hybrid Graphics - GPU switching support"
 22         depends on X86
 23         depends on ACPI
 24         select VGA_ARB
 25         help
 26           Many laptops released in 2008/9/10 have two GPUs with a multiplexer
 27           to switch between them. This adds support for dynamic switching when
 28           X isn't running and delayed switching until the next logoff. This
 29           feature is called hybrid graphics, ATI PowerXpress, and Nvidia
 30           HybridPower.

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