92 lines
3.9 KiB
Plaintext
92 lines
3.9 KiB
Plaintext
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What works:
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- Supports 8bpp, 15/16bpp, 24bpp and 32bpp. Heavy testing on ViRGE DX.
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- There is some known instability in ViRGE GX2, please report problems.
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- Silken Mouse is enabled by default, use the generic server option of
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-nosilk to disable it.
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XCONFIG options:
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The driver supports quite a few different XConfig options, which can
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be used to tune the driver and improve performance. Without any options,
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the driver will use conservative settings which should work on most
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hardware. Large improvements in performance are possible by selecting
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the proper options, which will probably work on most systems.
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Cursor:
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- "hwcursor" "off" behaves exactly like "swcursor". Default: "on"
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- "swcursor" will disable the HW Cursor. HW Cursor is used by default and
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no option is needed to enable it.
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Display:
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- "ShadowFB" Use shadow framebuffer. Disables HW acceleration. Default: off.
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- "Rotate" " cw "|" ccw " Rotate the screen CW - clockwise or CCW - counter
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clockwise. Disables HW Acceleration and HW Cursor, uses ShadowFB.
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Default: no rotation.
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- "XVideo" Disable XVideo support by using the off option. This changes FIFO
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settings which prevent screen noise for high-res modes. Default: on
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Video memory:
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- "slow_edodram" will switch the standard ViRGE to 2-cycle edo mode. Try this
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if you encounter pixel corruption on the ViRGE. Using this option will
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cause a large decrease in performance.
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- "fpm_vram" will switch the ViRGE/VX to fast page mode vram mode
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- "slow_dram " | " fast_dram" Change Trio 3D and 3D/2X memory options.
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Default: Use BIOS defaults.
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- "early_ras_precharge", "late_ras_precharge" adjust memory parameters. One
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of these will us the same settings as your video card defaults, and
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using neither in the config file does the same.
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- "set_mclk" sets the memory clock, format is:
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Option "set_mclk" "50000"
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in the XF86Config file. Valid values are any
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integer <= 100000, where 100000 == 100 MHz.
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- "set_refclk" sets the ref clock for ViRGE MX, format is:
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Option "set_refclk" "50000"
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Acceleration and graphic engine:
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- "NoAccel" turns off all acceleration
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- "fifo_aggressive", "fifo_moderate" and "fifo_conservative" alter the settings
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for the threshold at which the pixel FIFO takes over the internal
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memory bus to refill itself. The smaller this threshold, the better
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the acceleration performance of the card. You may try the fastest
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setting ("aggressive") and move down if you encounter pixel corruption.
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The optimal setting will probably depend on dot-clock and on color
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depth. Note that specifying any of these options will also alter other
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memory settings which should increase performance, so you should at
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least use "fifo_conservative" (this uses the chip defaults).
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- Common XAA acceleration options to disable primitives for test purposes:
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"XaaNoScreenToScreenCopy"
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"XaaNoSolidFillRect"
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"XaaNoColor8x8PatternFillRect"
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"XaaNoImageWriteRect"
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"XaaNoPixmapCache"
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PCI bus:
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- "pci_burst" will enable PCI burst mode. This should work on all but a
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few "broken" PCI chipsets, and will increase performance. Option may
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take a parameter "on", "off", "yes", etc...
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- "pci_retry" will allow the driver to rely on PCI Retry to program the
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ViRGE registers. "pci_burst" must be enabled for this to work.
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This will increase performance, especially for small fills/blits,
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because the driver does not have to poll the ViRGE before sending it
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commands to make sure it is ready. It should work on most
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recent PCI chipsets.
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ViRGE MX LCD options:
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- "lcd_center"
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- "set_lcdclk" allows setting the clock for a ViRGE MX LCD display. Format is:
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Option "set_lcdclk" "30000"
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in the config file. Valid values are ?
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Debug:
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- "ShowCache" Enable or disable viewing offscreen cache memory. A
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development debug option. Default: off.
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- "mx_cr3a_fix" Enable or disable a cr3a fix added for ViRGE MX.
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Default: on.
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$XFree86: xc/programs/Xserver/hw/xfree86/drivers/s3virge/README,v 1.9 2000/06/14 21:57:54 dawes Exp $
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