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savage - S3 Savage video driver


Section "Device"
  Identifier "devname"
  Driver "savage"


savage is an XFree86 driver for the S3 Savage family video accelerator chips. The savage driver supports PCI and AGP boards with the following chips:
(8a20 and 8a21)
(8c10 and 8c11)
(8c12 and 8c13)
ProSavage PM133
ProSavage KM133

Configuration Details

Please refer to XF86Config(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 cursor. 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 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 "NoAccel" "boolean"
Disable or enable acceleration. Default: acceleration is enabled.
Option "Rotate" "CW"
Option "Rotate" "CCW"
Rotate the desktop 90 degrees clockwise or counterclockwise. This option forces the ShadowFB option on, and disables acceleration. 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 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 "UseBIOS" "boolean"
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 XF86Config 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. Default: on (use the BIOS). Option "ShadowStatus" q*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. 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. Default: off (use normal status register).



See Also

XFree86(1) , XF86Config(5) , xf86config(1) , Xserver(1) , X(7)


Authors include Tim Roberts ( and Ani Joshi ( for the 4.0 version, and Tim Roberts and S. Marineau for the 3.3 driver from which this was derived.

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