>А что значат эти параметры?
>DotClock 75.75
Частота развертки
>HTimings 1024 1048 1128 1264
>
>VTimings 768 771 774 799
>
тайминги вертикальной и горизонтальной развертки
man xorg.conf
......
DotClock clock
is the dot (pixel) clock rate to be used for the mode.
HTimings hdisp hsyncstart hsyncend htotal
specifies the horizontal timings for the mode.
VTimings vdisp vsyncstart vsyncend vtotal
specifies the vertical timings for the mode.
Flags "flag" ...
specifies an optional set of mode flags, each of which is a separate string in double quotes. "Interlace" indicates that the mode is interlaced. "DoubleScan" indicates a mode where each scanline is doubled. "+HSync" and "-HSync" can be used to select the polarity of the HSync signal. "+VSync" and "-VSync" can be used to select the polarity of the VSync signal. "Composite" can be used to specify composite sync on hardware where this is supported. Additionally, on some hardware, "+CSync" and "-CSync" may be used to select the composite sync polarity.
HSkew hskew
specifies the number of pixels (towards the right edge of the screen) by which the display enable signal is to be skewed. Not all drivers use this information. This option might become necessary to override the default value supplied by the server (if any). "Roving" horizontal lines indicate this value needs to be increased. If the last few pixels on a scan line appear on the left of the screen, this value should be decreased.
VScan vscan
specifies the number of times each scanline is painted on the screen. Not all drivers use this information. Values less than 1 are treated as 1, which is the default. Generally, the "DoubleScan" Flag mentioned above doubles this value.
......
посмотрите в сторону xvidtune, он базово находиться в системе.
Еще посмотреть
https://www.opennet.ru/tips/info/832.shtml
Если найду сейчас забытый линк кину web-форму для расчета опций монитора под нужную частоту.