dynamic HorizSync

[Stefan Drexleri]

Hi,

if i want to use my TFT flatscreen in mode 1280x1024 @75Hz i have to
write this to Screen section:

Option         "HorizSync" "80"
Option         "VertRefresh" "75"

Using second line alone doesn't work, i'll have to apply HotizSync
option, too or only 60 Hz are reached.

[xorg.conf]
Section "Screen"
    Identifier     "Screen0"
    Device         "Card0"
    Monitor        "Monitor0"
    DefaultDepth    16
    Option         "DPMS"
    Option         "HorizSync" "80"
    Option         "VertRefresh" "75"
    SubSection     "Display"
        Viewport    0 0
        Depth       16
        Modes      "1280x1024" "1024x768" "800x600"
    EndSubSection
[/xorg.conf]

Problem is, HorizSync of 80 is too high for modes 1024x768 and 800x600
(so i will have to comment it out that 1024x768 and 800x600 are
working). They use lower frequencies. So if i comment out both options
"HorizSync" and "VertRefresh", all modes are usable (working), but
1280x1024 only @ 60 Hz.

What can i do?

I want to use 1280x1024 @ 75Hz.

bye