Manual Reference Pages - RENDITION (4)
rendition - Rendition video driver
rendition is an Xorg 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.
rendition driver supports PCI and AGP video cards based on the following Rendition/Micron chips:
Verite V1000 based cards.
Verite V2100 based cards. Diamond Stealth II S220 is the only known such card.
Verite V2200 based cards.
Please refer to xorg.conf(5) for general configuration
details. This section only covers configuration details specific to this
The driver auto-detects the chipset type, but the following
ChipSet names may optionally be specified in the config file
34Device34 section, and will override the auto-detection:
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
The following driver
Options are supported:
Option 34SWCursor34 34boolean34 |
Disables use of the hardware cursor. Default: use HW-cursor.
Option 34OverclockMem34 34boolean34 |
Increases the Mem/Sys clock to 125MHz/60MHz from standard 110MHz/50MHz.
Default: Not overclocked.
Option 34DacSpeed34 34MHz34 |
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
Option 34FramebufferWC34 34boolean34 |
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 unaccelerated
server. Requires that "MTRR"-support is compiled into the OS-kernel.
Default: Disabled for V1000, enabled for V2100/V2200.
Option 34NoDDC34 34boolean34 |
Disable probing of DDC-information from your monitor. This information is not
used yet and is only there for informational purposes.
Safe to disable if you experience problems
during startup of X-server.
Default: Probe DDC.
Option 34ShadowFB34 34boolean34 |
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 reading 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 34Rotate34 34CW34
Option 34Rotate34 34CCW34
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 34MTRR34 to let the driver request write-combining of memory access on the video board.
Xorg(1), xorg.conf(5), Xserver(1), X(7)
Authors include: Marc Langenbach, Dejan Ilic
|X Version 11 ||RENDITION (4x) ||xf86-video-rendition 4.2.5 |
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