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!! $XFree86: xc/programs/Xserver/hw/xfree86/Options,v 1.10 2003/02/15 06:46:30 paulo Exp $

!! XAA options
xaa.XaaNoCPUToScreenColorExpandFill:\
Disables accelerated rectangular expansion blits from source patterns \
stored in system memory (using a memory-mapped aperture).

xaa.XaaNoColor8x8PatternFillRect:\
Disables accelerated fills of a rectangular region with a full-color pattern.

xaa.XaaNoColor8x8PatternFillTrap:\
Disables accelerated fills of a trapezoidal region with a full-color pattern.

xaa.XaaNoDashedBresenhamLine:\
Disables accelerated dashed Bresenham line draws.

xaa.XaaNoDashedTwoPointLine:\
Disables accelerated dashed line draws between two arbitrary points.

xaa.XaaNoImageWriteRect:\
Disables acclerated transfers of full-color rectangular patterns from  \
system memory to video memory (using a memory-mapped aperture).

xaa.XaaNoMono8x8PatternFillRect:\
Disables accelerated fills of a rectangular region with a monochrome pattern.

xaa.XaaNoMono8x8PatternFillTrap:\
Disables accelerated fills of a trapezoidal region with a monochrome pattern.

xaa.XaaNoOffscreenPixmaps:\
Disables accelerated draws into pixmaps stored in offscreen video memory.

xaa.XaaNoPixmapCache:\
Disables caching of patterns in offscreen video memory.

xaa.XaaNoScanlineCPUToScreenColorExpandFill:\
Disables accelerated rectangular expansion blits from source patterns \
stored in system memory (one scan line at a time).

xaa.XaaNoScanlineImageWriteRect:\
Disables accelerated transfers of full-color rectangular patterns from \
system memory to video memory (one scan line at a time).

xaa.XaaNoScreenToScreenColorExpandFill:\
Disables accelerated rectangular expansion blits from source patterns \
stored in off-screen video memory.

xaa.XaaNoScreenToScreenCopy:\
Disables accelerated copies of rectangular regions from one part of video \
memory to another part of video memory.

xaa.XaaNoSolidBresenhamLine:\
Disables accelerated solid Bresenham line draws.

xaa.XaaNoSolidFillRect:\
Disables accelerated solid-color fills of rectangles.

xaa.XaaNoSolidFillTrap:\
Disables accelerated solid-color fills of Bresenham trapezoids.

xaa.XaaNoSolidHorVertLine:\
Disables accelerated solid horizontal and vertical line draws.

xaa.XaaNoSolidTwoPointLine:\
Disables accelerated solid line draws between two arbitrary points.


!! DDC Options
ddc.NoDDC:\
Disables DDC (Display Data Channel) so that the Xserver doesn't try to talk to\
the Monitor. \
Default: off, implies DDC is used.

ddc.NoDDC1:\
Disables use of DDC version 1 (DDC using vertical refresh). \
Default: off, implies DDC1 is used.

ddc.NoDDC2:\
Disables use of DDC version 2 (DDC using I2C - usually over vga connector). \
Default: off, implies DDC2 is used.


!! FBDev options
fbdev.fbdev:\
The framebuffer device to use. \
Default: /dev/fb0.

fbdev.ShadowFB:\
Enable or disable use of the shadow framebuffer layer. \
Default: on.

fbdev.Rotate:\
Enable rotation of the display. The supported values are "CW" (clockwise, \
90 degrees), "UD" (upside down, 180 degrees) and "CCW" (counter clockwise, \
270 degrees). Implies use of the shadow framebuffer layer. \
Default: off.


!! MGA options
mga.ColorKey:\
Set the colormap index used for the transparency key for the depth 8 plane \
when operating in 8+24 overlay mode. The value must be in the range 2-255. \
Default: 255.

!mga.HWcursor:\
!Enable or disable the HW cursor. Default: on.

mga.MGASDRAM:\
Specify whether G100, G200 or G400 cards have SDRAM. The driver attempts to \
auto-detect this based on the card's PCI subsystem ID. This option may be \
used to override that auto-detection. The mga driver is not able to \
auto-detect the presence of of SDRAM on secondary heads in multihead \
configurations so this option will often need to be specified in multihead \
configurations. Default: auto-detected.

mga.NoAccel:\
Disable or enable 2D hardware acceleration. Default: acceleration is enabled.

mga.OverclockMem:\
Set clocks to values used by some commercial X-Servers (G100, G200 and \
G400 only). Default: off.

mga.Overlay:\
Enable 8+24 overlay mode. Only appropriate for depth 24. (Note: the G100 is \
unaccelerated in the 8+24 overlay mode due to a missing hardware feature). \
Default: off.

mga.PciRetry:\
Enable or disable PCI retries. Default: off.

mga.Rotate:\
Rotate the display clockwise or counterclockwise. This mode is unaccelerated. \
Default: no rotation.

mga.ShadowFB:\
Enable or disable use of the shadow framebuffer layer. Default: off. \

mga.SyncOnGreen:\
Enable or disable combining the sync signals with the green signal. \
Default: off.

mga.UseFBDev:\
Enable or disable use of on OS-specific fb interface (and is not supported \
on all OSs). See fbdevhw(4) for further information. Default: off.

mga.VideoKey:\
This sets the default pixel value for the YUV video overlay key. \
Default: undefined.

mga.TexturedVideo:\
This has XvImage support use the texture engine rather than the video \
overlay. This option is only supported by the G200 and G400, and only in \
16 and 32 bits per pixel. Default: off.

mga.NoHal:\
Matrox provides a "Hardware Abstraction Layer", \
a separate binary which enables extra hardware features from G400 onwards. \
Default: HAL is used.

!mga.DigitalScreen:\
! Option Ignored. Drivers auto-detect Digital output if they support it at all.
!Default: Auto-detected.

! mga.TV:\
! Option Ignored. Drivers auto-detect TV if they support TV out at all.
!Default: Auto-detected.

mga.TVStandard:\
(HAL only) Picture standard for TV out. Use "PAL" for 50Hz PAL. \
Default: 60Hz NTSC.

mga.CableType:\
(HAL only) Set the cable type for TV out. Options are "SCART_RGB", \
"SCART_COMPOSITE", or "SCART_TYPE2". Any other string enables the default. \
Default: YC_COMPOSITE.

mga.SwappedHead:\
(HAL only) For Dual Head cards, reverse relationship between CRTC picture \
generators and video output sockets. \
Especially useful with TV or digital outputs. \
Default: CRTC1 generates output for socket 1 and CRTC2 generates output for socket 2.

mga.Crtc2Half:\
In dual head mode, allow CRTC2 to use half of the video memory. \
Default: CRTC2 uses min{8MB, half video RAM}, but see also Crtc2Ram.

mga.Crtc2Ram:\
In dual head mode, CRTC2 will use this many KB of video memory. \
Overrrides Crtc2Half. \
Default: CRTC2 uses min{8MB, half video RAM}, but see also Crtc2Half.

mga.ShowCache:\
An option for hackers. The pixmap cache lives in off-screen video memory. \
This option extends the virtual desktop to show this part of video memory. \
Default: Off.

mga.AGPMode:\
AGP bus speed multiplier, used by DRI. \
Default: x1 (slowest but most stable).


!! R128 options

!r128.SWcursor: \
!Selects software cursor. \
!Default: off.

r128.NoAccel:\
Enables or disables all hardware acceleration. \
Default: on.

r128.Dac6Bit:\
Enables or disables the use of 6 bits per color component when in 8 bpp \
mode (emulates VGA mode). \
Default: off.

r128.VideoKey:\
This overrides the default pixel value for the YUV video overlay key. \
Default: undefined.

r128.Display:\
Select display mode for devices which support flat panels. Supported\
modes are "FP", "CRT", "Mirror", "BIOS". \
Default: "FP".

r128.ProgramFPRegs:\
Enable or disable programming of the flat panel registers.\
Beware that this may damage your panel, so use at your own risk. \
Default: device dependant.

r128.PanelWidth:\
Override flat panel width in pixels. \
Default: determined using BIOS.

r128.PanelHeight:\
Override flat panel height in pixels. \
Default: determined using BIOS.

r128.UseFBDev:\
Enable or disable use of on OS-specific fb interface (and is not supported \
on all OSs). See fbdevhw(4) for further information. Default: off.

r128.DMAForXv:\
Try or don't try to use DMA for Xv image transfers. This will reduce CPU \
usage when playing big videos like DVDs, but may cause instabilities. \
Default: off.


!! Radeon options

radeon.SWcursor:\
Selects software cursor. Default: off.

radeon.NoAccel:\
Disables all hardware acceleration. Default: off.

radeon.Dac6Bit:\
Enables or disables the use of 6 bits per color component when in 8 bpp \
mode (emulates VGA mode). Default: off.

radeon.VideoKey:\
This overrides the default pixel value for the YUV video overlay key. \
Default: undefined.

radeon.UseFBDev:\
Enable or disable use of an OS-specific framebuffer device interface \
(which is not supported on all OSs). Default: off.

radeon.AGPMode:\
Set AGP data transfer rate. (used only when DRI is enabled) \
Valid choices: 1 (default), 2 and 4

radeon.AGPFastWrite:\
Enable AGP fast write. (used only when DRI is enabled) \
Default: off.

radeon.ForcePCIMode:\
Force to use PCI GART for DRI acceleration. (used only when DRI is enabled) \
Default: off.

radeon.DDCMode:\
Force to use the modes queried from the connected monitor. Default: off.

radeon.CloneDisplay:\
This option is only used for dual-head cards with only single screen section \
specified in the configuration file. Valid choices: \
0 - disable (one CRTC used for both heads) \
1 - auto-detect (default) \
2 - force on \
3 - auto-detect + 2nd head overlay \
4 - force on + 2nd head overlay \

radeon.CloneMode:\
Set the first mode for the secondary head. It can be different from the modes \
used for the primary head. If you don't have this line while clone is on, the \
modes specified for the primary head will be used for the secondary head.

radeon.CloneHSync:\
Set the horizontal sync range for the secondary monitor. It is not required if \
a DDC capable monitor is connected. Default: undefined.

radeon.CloneVRefresh:\
Set the vertical refresh range for the secondary monitor. It is not required \
if a DDC capable monitor is connected. Default: undefined.

radeon.PanelOff:\
Disable panel output. Only used when clone is enabled. Default: off.

radeon.EnablePageFlip:\
Enable page flipping for 3D acceleration. This will increase performance but \
not work correctly in some rare cases. Default: off.


!! NeoMagic options

neo.StrangeLockups:\
Before XFree86 version 4.2.0 many NeoMagic systems experienced \
strange lockups unless they used the options \ 
"XaaNoScanlineImageWriteRect" and "XaaNoScanlineCPUToScreenColorExpandFill". \
Setting this to "No" is faster but will lock some machines. \
Default: Yes.

!! Vesa options
vesa.ShadowFB:\
Enable or disable use of the shadow framebuffer layer. See shadowfb(4)\
for further information. Default: on.


!! SiS Options
sis.NoAccel:\
Disable or enable acceleration. \
Default: acceleration is enabled.

!sis.HWcursor:\
!Enable or disable the HW cursor. \
!Default: on.

!sis.SWcursor:\
!The opposite of HWCursor. \
!Default: on.

sis.NoXVideo:\
Disable XV (XVideo) extension support. \
Default: off.

sis.SetMClk:\
Set the memory clock in MHz. \
Default: autodetect.

sis.PciRetry:\
Enable or disable PCI retries. \
Default: on.

sis.TurboQueue:\
Enable or disable TurboQueue mode. \
Default: off for SIS530, on for the others.

sis.FastVram:\
Enable or disable FastVram mode. \
Default: on.

sis.Rotate:\
Rotate the display clockwise (CW) or counterclockwise (CCW). \
This mode is unaccelerated, and uses the Shadow Frame Buffer layer \
Default: no rotation.

sis.ForceCRT2Type:\
Force display type to one of: TV, LCD or VGA. \
Default: autodetect.

sis.ShadowFB:\
Enable or disable use of the shadow framebuffer layer. See shadowfb(4) for \
further information. Default: off.
 
!! Generic driver options, apply to many drivers

*.SWcursor:\
See also HWcursor.\
Default: Usually Off.

*.HWcursor:\
Use the hardware cursor. See also SWcursor. \
Default: usually HWcursor, but some drivers may default to software.