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NAME
rendition - Rendition video driver
SYNOPSIS
Section "Device"
Identifier "devname"
Driver "rendition"
...
EndSection
DESCRIPTION
rendition is an XFree86 driver for Rendition/Micron based
video cards. The driver supports following framebuffer
depths: 8, 15 (Verite V1000 only), 16 and 24. Acceleration
and multi-head configurations are not supported yet, but are
work in progress.
SUPPORTED HARDWARE
The rendition driver supports PCI and AGP video cards based
on the following Rendition/Micron chips:
V1000 Verite V1000 based cards.
V2100 Verite V2100 based cards. Diamond Stealth II
S220 is the only known such card.
V2200 Verite V2200 based cards.
CONFIGURATION DETAILS
Please refer to XF86Config(5) for general configuration
details. This section only covers configuration details
specific to this driver.
The driver auto-detects the chipset type, but the following
ChipSet names may optionally be specified in the config file
"Device" section, and will override the auto-detection:
"v1000", "v2x00".
The driver will auto-detect the amount of video memory
present for all chips. If the amount of memory is detected
incorrectly, the actual amount of video memory should be
specified with a VideoRam entry in the config file "Device"
section.
The following driver Options are supported:
Option "SWCursor" "boolean"
Disables use of the hardware cursor. Default: use HW-
cursor.
Option "OverclockMem" "boolean"
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Increases the Mem/Sys clock to 125MHz/60MHz from stan-
dard 110MHz/50MHz. Default: Not overclocked.
Option "DacSpeed" "MHz"
Run the memory at a higher clock. Useful on some cards
with display glitches at higher resolutions. But adds
the risk to damage the hardware. Use with caution.
Option "FramebufferWC" "boolean"
If writecombine is disabled in BIOS, and you add this
option in configuration file, then the driver will try
to request writecombined access to the framebuffer.
This can drastically increase the performance on unac-
celerated server. Requires that "MTRR"-support is com-
piled into the OS-kernel. Default: Disabled for V1000,
enabled for V2100/V2200.
Option "NoDDC" "boolean"
Disable probing of DDC-information from your monitor.
This information is not used yet and is only there for
informational purposes. This might change before final
XFree86 4.0 release. Safe to disable if you experience
problems during startup of X-server. Default: Probe
DDC.
Option "ShadowFB" "boolean"
If this option is enabled, the driver will cause the
CPU to do each drawing operation first into a shadow
frame buffer in system virtual memory and then copy the
result into video memory. If this option is not active,
the CPU will draw directly into video memory. Enabling
this option is beneficial for those systems where read-
ing from video memory is, on average, slower than the
corresponding read/modify/write operation in system
virtual memory. This is normally the case for PCI or
AGP adapters, and, so, this option is enabled by
default unless acceleration is enabled. Default:
Enabled unless acceleration is used.
Option "Rotate" "CW"
Option "Rotate" "CCW"
Rotate the display clockwise or counterclockwise. This
mode is unaccelerated. Default: no rotation.
For the moment the driver defaults to not request write-
combine for any chipset as there has been indications of
problems with it. Use Option "MTRR" to let the driver
request write-combining of memory access on the video board.
SEE ALSO
XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7)
XFree86 Version 4.5.0 2
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AUTHORS
Authors include: Marc Langenbach, Dejan Ilic
XFree86 Version 4.5.0 3