[Linux-fbdev-users] tuning a set of fbdev timings

[Brian J. M. <508...@in...>]

I have a set of timings for the Linux FB that I want to tune a bit,
but don't really want to start from scratch designing a new set of
timings.  The fb.modes entry:

#
#  From the teletux (teletux.sf.net) project's syncfb
#
#       640x480, 59.94 Hz, Non-Interlaced (25.175 MHz dotclock)
#       
#                               Horizontal      Vertical
#       Resolution              640             480
#       Scan Frequency          31.469 kHz      59.94 Hz
#       Sync Width              3.813 us        0.064 ms
#                               12 chars        2 lines
#       Front Porch             0.636 us        0.318  ms
#                               2 chars         10 lines
#       Back Porch              1.907 us        1.048  ms
#                               6 chars         33 lines
#       Active Time             25.422 us       15.253 ms
#                               80 chars        480 lines
#       Blank Time              6.356 us        1.430 ms
#                               20 chars        45 lines
#       Polarity                negative        negative
#

mode "640x480-NTSC-TV"
    # D: 25.175 MHz, H: 31.469 kHz, V: 59.94 Hz
    geometry 640 480 640 480 16
    timings 39722 48 16 33 10 96 2
endmode

The problem is that on my Matrox G400, the picture is not wide enough
and thusly leaves black bars on the sides.  I want to stretch the
picture to the edges of the screen.  How hard/simple would this be to
do?  Any hints on which values to tweak?

b.

-- 
Brian J. Murrell