framebuffer console

Orlando Andico (orly@mozcom.com)
Sat, 6 Mar 1999 19:05:39 +0800 (JST)

I'm using the framebuffer console with a vesa-2.0 compatible video card.
I've downloaded fbset-2.0(1998-10-28) but I can't change the mode timings
from the defaults in the vesa bios. I would like to do this because the
vesa bios defaults have really low refresh rates which are killing my
eyes (I'm using the XF86_FBDev as well).

Here's my /etc/fb.modes (set to use 800x600, 32bit, 72hz refresh):

# video mode for frame-buffer console
mode "800x600x16m"
geometry 800 600 800 600 32
timings 20000 44 64 27 45 120 6
endmode

this is what I try to do to change the mode:

$ fbset --verbose 800x600x16m
Linux Frame Buffer Device Configuration Version 2.0-pre (28/10/1998)
(C) Copyright 1995-1998 by Geert Uytterhoeven

Opening frame buffer device `/dev/fb0'
Reading mode database from file `/etc/fb.modes'
Using video mode `800x600x16m'
Setting video mode to `/dev/fb0'

However, I do not see anything changing. The refresh rate is as low as
ever. fbset without options gives the following:

$ fbset

mode "name"
# D: 48.001 MHz, H: 46.876 kHz, V: 75.121 Hz
geometry 800 600 800 600 32
timings 20833 96 32 16 4 96 4
endmode

Actually it's not 75Hz refresh because my monitor does not support 46.7kHz
hsync, only 37.8 and 48.0, so i suspect it's running at 56Hz. even without
fluorescent lighting i can see the flicker.

Any ideas owuld be much appreciated.

-------------------------------------------------------------------
Orlando Andico <orly@mozcom.com>
Mosaic Communications, Inc.
Phone: +63 (2) 937-2293 Mobile: +63 (0912) 800-8262

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