Option 34HWCursor34 34boolean34
Option 34SWCursor34 34boolean34
These two options interact to specify hardware or software cursor. If the
SWCursor option is specified, any HWCursor setting is ignored. Thus, either
34HWCursor off34 or 34SWCursor on34 will force the use of the software
cursor. On Savage/MX and Savage/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 cursor.
Option 34NoAccel34 34boolean34 |
Disable or enable acceleration. Default: acceleration is enabled.
Option 34AccelMethod34 34string34 |
Chooses between available acceleration architectures. Valid options are
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, but the rendering code for it is newer and
possibly unstable. The default is
Option 34Rotate34 34CW34
Option 34Rotate34 34CCW34
Rotate the desktop 90 degrees clockwise or counterclockwise.
This option forces the ShadowFB option on, and disables acceleration and
the RandR extension.
Default: no rotation.
Option 34ShadowFB34 34boolean34 |
Enable or disable use of the shadow framebuffer layer.
This option disables acceleration.
Option 34LCDClock34 34frequency34 |
Override the maximum dot clock. Some LCD panels produce incorrect 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 34CrtOnly34 34boolean34 |
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
Option 34UseBIOS34 34boolean34 |
Enable or disable use of the video BIOS to change modes. Ordinarily, 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 operation.
Default: on (use the BIOS).
Option 34IgnoreEDID34 34boolean34 |
Do not use EDID data for mode validation, but DDC is still used
for monitor detection. This is different from NoDDC option.
The default value is
Option 34ShadowStatus34 34boolean34 |
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 34on34 (use shadow status), otherwise
the default is 34off34 (use normal status register).
Option 34DisableCOB34 34boolean34 |
Disables the COB (Command Overflow Buffer) on savage4 and newer chips.
There is supposedly a HW cache coherency problem on certain 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: 34off34 (use COB).
Option 34BCIforXv34 34boolean34 |
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. On some combinations of chipsets and video players,
BCI formatting might actually be slower than software formatting (34AGPforXv34
might help in this case). BCI formatting can only be used on video data with
a width that is a multiple of 16 pixels (which is the vast majority of videos).
Other widths are handled through software formatting. Default: on for prosavage
and twister (use BCI for Xv); off for savage4 (do not use the BCI for Xv).
Option 34AGPforXv34 34boolean34 |
Instructs the BCI Xv pixel formatter to use AGP memory as a scratch buffer.
Ordinarily the BCI formatter uses a an area in framebuffer memory to hold
YV12 planar data to be converted for display. This requires a somewhat expensive
upload of YV12 data to framebuffer memory. The 34AGPforXv34 option causes the BCI
formatter to place the YV12 data in AGP memory instead, which can be uploaded
faster than the framebuffer. Use of this option cuts upload overhead by 25%
according to benchmarks. This option also smooths out most of the shearing
present when using BCI for pixel conversion. Currently this option is
experimental and is disabled by default. Video width restrictions that apply to 34BCIforXv34
also apply here. Only valid when 34DRI34 and 34BCIforXv34 are both active,
and only on AGP chipsets. Default: 34off34.
If 34AccelMethod34 is set to 34EXA34 and 34AGPforXv34 is enabled, then the
driver will also attempt to reuse the AGP scratch buffer for UploadToScreen
Option 34AGPMode34 34integer34 |
Set AGP data transfer rate.
(used only when DRI is enabled)
1 -- x1 (default)
2 -- x2
4 -- x4
others -- invalid
Option 34AGPSize34 34integer34 |
The amount of AGP memory that will allocated for DMA and textures in
MB. Valid sizes are 4, 8, 16, 32, 64, 128 and 256. The default is
Option 34DmaMode34 34string34 |
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 dont use DMA at all
Vertex -- Only use vertex DMA or dont 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
doesnt support command DMA).
Option 34DmaType34 34string34 |
The type of memory that will be used by the 3D driver for DMA (direct
PCI -- PCI memory (default on PCI cards)
AGP -- AGP memory (default on AGP cards)
34AGP34 only works if you have an AGP card.
Option 34BusType34 34string34 |
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)
34AGP34 only works if you have an AGP card. If you choose 34PCI34
on an AGP card the AGP bus speed is not set and no AGP aperture is
allocated. This implies
Option 34DRI34 34boolean34 |
Enable DRI support. This option allows you to enable or disable the DRI.
Default: 34on34 (enable DRI).