Ubuntu Manpage: r128 - ATI Rage 128 video driver

Provided by: xserver-xorg-video-r128_6.12.1-1_amd64

NAME

       r128 - ATI Rage 128 video driver

SYNOPSIS

       Section "Device"
         Identifier "devname"
         Driver "r128"
         ...
       EndSection

DESCRIPTION

       r128  is  an Xorg driver for ATI Rage 128 based video cards.  It contains full support for
       8, 15, 16 and 24 bit pixel depths, hardware acceleration of drawing  primitives,  hardware
       cursor,  video modes up to 1800x1440 @ 70Hz, doublescan modes (e.g., 320x200 and 320x240),
       gamma correction at all pixel depths, a fully programming dot clock and robust  text  mode
       restoration for VT switching.  Dualhead is supported on M3/M4 mobile chips.

SUPPORTED HARDWARE

       The  r128  driver  supports all ATI Rage 128 based video cards including the Rage Fury AGP
       32MB, the XPERT 128 AGP 16MB and the XPERT 99 AGP 8MB.

CONFIGURATION DETAILS

Please refer to xorg.conf(5) for general configuration details. This section only covers
configuration details specific to this driver.

The driver auto-detects all device information necessary to initialize the card. However,
if you have problems with auto-detection, you can specify:

VideoRam - in kilobytes
MemBase - physical address of the linear framebuffer
IOBase - physical address of the MMIO registers
ChipID - PCI DEVICE ID

In addition, the following driver Options are supported:

Option "SWcursor" "boolean"
Selects software cursor. The default is off.

Option "NoAccel" "boolean"
Enables or disables all hardware acceleration. The default is to enable hardware
acceleration.

Option "EnablePageFlip" "boolean"
Enable page flipping for 3D acceleration. This will increase performance but not
work correctly in some rare cases, hence the default is off.

Option "RenderAccel" "boolean"
Enables or disables hardware Render acceleration. It is only supported when using
EXA acceleration and DRI. The default is to enable Render acceleration.

Option "AccelMethod" "string"
Chooses between available acceleration architectures. Valid options are XAA and
EXA. XAA is the traditional acceleration architecture and support for it is very
stable. EXA is a newer acceleration architecture with better performance for the
Render and Composite extensions. The default is XAA.

Option "VideoKey" "integer"
This overrides the default pixel value for the YUV video overlay key. The default
value is undefined.

The following Options are mostly important for non-x86 architectures:

Option "ProgramFPRegs" "boolean"
Enable or disable programming of the flat panel registers. Beware that this may
damage your panel, so use this at your own risk. The default depends on the
device.

Option "PanelWidth" "integer"

Option "PanelHeight" "integer"
Override the flat panel dimensions in pixels. They are used to program the flat
panel registers and normally determined using the video card BIOS. If the wrong
dimensions are used, the system may hang.

Option "UseFBDev" "boolean"
Enable or disable use of an OS-specific framebuffer device interface (which is not
supported on all OSs). See fbdevhw(4) for further information. Default: on for
PowerPC, off for other architectures.

Option "DMAForXv" "boolean"
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.

The following additional Options are supported:

Option "ShowCache" "boolean"
Enable or disable viewing offscreen cache memory. A development debug option.
Default: off.

Option "VGAAccess" "boolean"
Tell the driver if it can do legacy VGA IOs to the card. This is necessary for
properly resuming consoles when in VGA text mode, but shouldn't be if the console
is using radeonfb or some other graphic mode driver. Some platforms like PowerPC
have issues with those, and they aren't necessary unless you have a real text mode
in console. The default is off on PowerPC and SPARC and on on other architectures.

Dualhead Note: The video BIOS on some laptops interacts strangely with dualhead. This can
result in flickering and problems changing modes on crtc2. If you experience these
problems try toggling your laptop's video output switch (e.g., fn-f7, etc.) prior to
starting X or switch to another VT and back.

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