Clock selection problems with some ET4000 boards

Information for Tseng Chipset Users : Clock selection problems with some ET4000 boards
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## 4. Clock selection problems with some ET4000 boards

XFree86 has some problems getting the clock selection right with some ET4000 boards when the server is started from a high-resolution text mode. The clock selection is always correct when the server is started from a standard 80x25 text mode.

This problem is indicated when the reported clocks are different when the server is started from the high-resolution text mode from what they are when it is started from the 80x25 text mode. To allow the server to work correctly from the high-resolution text mode, there are some Option flags that may be set in `XF86Config`. To find out which flags to set, start the server with the -probeonly flag from an 80x25 text mode and look at the information printed by the server. If the line:

      VGAXXX: ET4000: Initial hibit state: low

is printed, put the following in the SVGA, VGA16 and VGA2 sections of your `XF86Config`:

      Option "hibit_low"

If the line:

      VGAXXX: ET4000: Initial hibit state: high

is printed, put the following in the SVGA, VGA16 and VGA2 sections of your `XF86Config`:

      Option "hibit_high"

Information for Tseng Chipset Users : Clock selection problems with some ET4000 boards
Previous: ET6000 driver features
Next: Basic configuration