Table of Contents
r128 - ATI Rage 128 video driver
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.
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.
Please refer to xorg.conf(5)
for general configuration
details. This section only covers configuration details specific to this
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 "Dac6Bit" "boolean"
- Enables or disables the use of 6 bits per color component when in 8 bpp
mode (emulates VGA mode). By default, all 8 bits per color component are
used. The default is off.
- Option "VideoKey" "integer"
- This overrides the
default pixel value for the YUV video overlay key. The default value is
- Option "Display" "string"
- Select display mode for devices which
support flat panels. Supported modes are:
"FP" - use flat panel;
- use cathode ray tube;
"Mirror" - use both FP and CRT;
"BIOS" - use mode
as configured in the BIOS.
The default is FP.
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"
- 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"
- 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.
The following additional Options are supported:
- Option "ShowCache"
- 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.
Rickard E. (Rik) Faith firstname.lastname@example.org
Kevin E. Martin email@example.com