*- On 1 Jul, Matthew Gregan wrote about "X modeline conversions" > Hi everyone. > > I'm trying to work out a good modeline for X for 1152x864. The reason I'm > doing this is because I was installing some new drivers for my video card > under Windows and discovered that my monitor can do 1152x864 at an acceptable > refresh rate... > > I've got the figures from Windows, but I only vaguely understand how they > relate to the X modelines, and I can't figure out how to convert them over. > Hopefully someone with more experience can point me in the right direction... > > Under Windows, this is the info I have about the mode: > Pixel clock: 112320kHz > > Horizontal: > Frequency: 70kHz > Front porch: 64 pixels > Sync: 128 pixels > Back porch: 256 pixels > Negative sync polarity > > Vertical: > Frequency: 78Hz > Front porch: 1 line > Sync: 3 lines > Back porch: 2 lines > Negative sync polarity > > I've tried reading through ESR's XF86 video timings howto, but it wasn't > really helpful to my problem. From what I understand, the front/back porch is > the time of the rise and fall of the signal, but I don't know how to relate > the numbers I have back to anything useful for X. > > I've found a modeline already existing in the XF86 config which is very close > to what I want (1152x864 at 78Hz, but it's 70.8kHz horizontal frequency is > just too much for my monitor to handle). > > If anybody can help, or point me in the right direction, I would be very > happy. Thanks. :-) > > Oh, those Windows figures are from the Matrox monitor customization utility, > if that matters...
You can give Colas' XFree Modeline Generator at http://www.inria.fr/cgi-bin/nph-colas-modelines a try. It will give you a whole range of modelines. You could also us xvidtune to fine tune a mode that is close to what you want. -- Brian --------------------------------------------------------------------- Mechanical Engineering [EMAIL PROTECTED] Purdue University http://www.ecn.purdue.edu/~servis ---------------------------------------------------------------------
