Iain 2002-04-10 08:59
It was designed for a digital panel, so second mon only has 15Mhz pixel clock, and
nother important relationship is that between the resolution, the pixel clock (aka dot clock) and the vertical refresh rate:
RR = PCLK / (HFL * VFL)
In other words, the refresh rate (RR) is equal to the pixel clock (PCLK) divided by the total number of pixels: the horizontal frame length (HFL) multiplied by the vertical frame length (VFL) (note that these are the frame lengths, and not just the visible resolutions). As described in the XFree86 Video Timings HOWTO, the above formula can be rewritten as:
PCLK = RR * HFL * VFL
Given a maximum pixel clock, you can adjust the RR, HFL and VFL as desired, as long as the product of the three is consistent. The pixel clock is reported in the log file when you run X with verbose logging: `startx -- -logverbose 5`. Your XFree86.0.log should contain several lines like:
From nvidia readme.
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