savage - S3 Savage video driver
savage is an Xorg driver for the S3 Savage family video accelerator
chips. 2D, 3D, and Xv acceleration is supported on all chips except
the Savage2000 (2D only). Dualhead operation is supported on MX, IX,
and SuperSavage chips. The savage driver supports PCI and AGP boards
with the following chips:
Savage3D (8a20 and 8a21) (2D, 3D)
Savage4 (8a22) (2D, 3D)
Savage2000 (9102) (2D only)
Savage/MX (8c10 and 8c11) (2D, 3D, Dualhead)
Savage/IX (8c12 and 8c13) (2D, 3D, Dualhead)
SuperSavage/MX (8c22, 8c24, and 8c26) (2D, 3D, Dualhead)
SuperSavage/IX (8c2a, 8c2b, 8c2c, 8c2d, 8c2e, and 8c2f) (2D, 3D, Dual-
ProSavage PM133 (8a25) (2D, 3D)
ProSavage KM133 (8a26) (2D, 3D)
Twister (ProSavage PN133)
(8d01) (2D, 3D)
TwisterK (ProSavage KN133)
(8d02) (2D, 3D)
ProSavage DDR (8d03) (2D, 3D)
ProSavage DDR-K (8d04) (2D, 3D)
Please refer to xorg.conf(5) for general configuration details. This
section only covers configuration details specific to this driver.
The following driver Options are supported:
Option "HWCursor" "boolean"
Option "SWCursor" "boolean"
These two options interact to specify hardware or software cur-
sor. If the SWCursor option is specified, any HWCursor setting
is ignored. Thus, either "HWCursor off" or "SWCursor on" will
force the use of the software cursor. On Savage/MX and Sav-
age/IX chips which are connected to LCDs, a software cursor will
be forced, because the Savage hardware cursor does not correctly
track the automatic panel expansion feature. Default: hardware
Option "NoAccel" "boolean"
Disable or enable acceleration. Default: acceleration is
enabled. TP Option "AccelMethod" "string" Chooses between
available acceleration architectures. Valid options are XAA and
EXA. XAA is the traditional acceleration architecture and sup-
port for it is very stable. EXA is a newer acceleration archi-
tecture with better performance for the Render and Composite
extensions, but the rendering code for it is newer and possibly
unstable. The default is XAA.
Option "Rotate" "CW"
Option "Rotate" "CCW"
Rotate the desktop 90 degrees clockwise or counterclockwise.
This option forces the ShadowFB option on, and disables acceler-
ation. Default: no rotation.
Option "ShadowFB" "boolean"
Enable or disable use of the shadow framebuffer layer. This
option disables acceleration. Default: off.
Option "LCDClock" "frequency"
Override the maximum dot clock. Some LCD panels produce incor-
rect results if they are driven at too fast of a frequency. If
UseBIOS is on, the BIOS will usually restrict the clock to the
correct range. If not, it might be necessary to override it
here. The frequency parameter may be specified as an integer in
Hz (135750000), or with standard suffixes like "k", "kHz", "M",
or "MHz" (as in 135.75MHz).
Option "CrtOnly" "boolean"
This option disables output to the LCD and enables output to the
CRT port only. It is useful on laptops if you only want to use
the CRT port or to force the CRT output only on desktop cards
that use mobile chips. Default: auto-detect active outputs
Option "UseBIOS" "boolean"
Enable or disable use of the video BIOS to change modes. Ordi-
narily, the savage driver tries to use the video BIOS to do mode
switches. This generally produces the best results with the
mobile chips (/MX and /IX), since the BIOS knows how to handle
the critical but unusual timing requirements of the various LCD
panels supported by the chip. To do this, the driver searches
through the BIOS mode list, looking for the mode which most
closely matches the xorg.conf mode line. Some purists find this
scheme objectionable. If you would rather have the savage
driver use your mode line timing exactly, turn off the UseBios
option. Note: Use of the BIOS is required for dualhead opera-
tion. Default: on (use the BIOS).
Option "ShadowStatus" "boolean"
Enables the use of a shadow status register. There is a chip
bug in the Savage graphics engine that can cause a bus lock when
reading the engine status register under heavy load, such as
when scrolling text or dragging windows. The bug affects about
4% of all Savage users without DRI and a large fraction of users
with DRI. If your system hangs regularly while scrolling text
or dragging windows, try turning this option on. This uses an
alternate method of reading the engine status which is slightly
more expensive, but avoids the problem. When DRI is enabled
then the default is "on" (use shadow status), otherwise the
default is "off" (use normal status register).
Option "DisableCOB" "boolean"
Disables the COB (Command Overflow Buffer) on savage4 and newer
chips. There is supposedly a HW cache coherency problem on cer-
tain savage4 and newer chips that renders the COB useless. If
you are having problems with 2D acceleration you can disable the
COB, however you will lose some performance. 3D acceleration
requires the COB to work. This option only applies to Savage4
and newer chips. Default: "off" (use COB).
Option "BCIforXv" "boolean"
Use the BCI to copy and reformat Xv pixel data. Using the BCI
for Xv causes graphics artifacts on some chips. This option
only applies to Savage4 and prosavage/twister chips. Default:
on for prosavage and twister (use BCI for Xv); off for savage4
(do not use the BCI for Xv).
Option "AGPMode" "integer"
Set AGP data transfer rate. (used only when DRI is enabled)
1 -- x1 (default)
2 -- x2
4 -- x4
others -- invalid
Option "AGPSize" "integer"
The amount of AGP memory that will allocated for DMA and tex-
tures in MB. Valid sizes are 4, 8, 16, 32, 64, 128 and 256. The
default is 16MB.
Option "DmaMode" "string"
This option influences in which way DMA (direct memory access)
is used by the kernel and 3D drivers.
Any -- Try command DMA first, then vertex DMA (default)
Command -- Only use command DMA or don't use DMA at all
Vertex -- Only use vertex DMA or don't use DMA at all
None -- Disable DMA
Command and vertex DMA cannot be enabled at the same time. Which
DMA mode is actually used in the end also depends on the DRM
version (only >= 2.4.0 supports command DMA) and the hardware
(Savage3D/MX/IX doesn't support command DMA).
Option "DmaType" "string"
The type of memory that will be used by the 3D driver for DMA
(direct memory access).
PCI -- PCI memory (default on PCI cards)
AGP -- AGP memory (default on AGP cards)
"AGP" only works if you have an AGP card.
Option "BusType" "string"
The bus type that will be used to access the graphics card.
PCI -- PCI bus (default on PCI cards)
AGP -- AGP bus (default on AGP cards)
"AGP" only works if you have an AGP card. If you choose "PCI" on
an AGP card the AGP bus speed is not set and no AGP aperture is
allocated. This implies DmaType "PCI".
Xorg(1), xorg.conf(5), xorgconfig(1), Xserver(1), X(7)
Authors include Tim Roberts (firstname.lastname@example.org) and Ani Joshi
(email@example.com) for this version, and Tim Roberts and S. Marineau
for the original driver from which this was derived.
X Version 11 xf86-video-savage 2.1.2 SAVAGE(4)
Man(1) output converted with