xorg.conf and VESA modes

Dark_Helmet · 12-28-2004, 09:57 PM

Ok, reasonably simple question. I see this in my Xorg.0.log file:

Code:

(**) NVIDIA(0): Validated modes for display device CRT-0:
(**) NVIDIA(0):      Default mode "1024x768": 78.8 MHz, 60.1 kHz, 75.1 Hz
(**) NVIDIA(0):      Default mode "1024x768": 75.0 MHz, 56.5 kHz, 70.1 Hz
(**) NVIDIA(0):      Default mode "1024x768": 65.0 MHz, 48.4 kHz, 60.0 Hz

So, my question is, how can I tell xorg to use the 60Hz refresh instead of the 75.1, or vice versa?

My screen section is:

Code:

Section "Screen"
	Identifier "Screen0"
	Device     "Card0"
	Monitor    "Monitor0"
	DefaultDepth 16
	SubSection "Display"
		Viewport   0 0
		Depth     16
		Modes "1024x768"
	EndSubSection
EndSection

I've tried changing the "Modes" line to 1024x768@60 (just grasping at straws), and xorg didn't like that.

My monitor documentation doesn't list and I can't find online what the dot/pixel clock is frequency is, or any of the other spiffy horizontal and vertical timings to define my own video mode. Or is the information reported from the log file above enough to define a new mode? The documentation leads me to believe you need four horizontal timings and four vertical (rather than the single numbers the log displays).

Any suggestions?

cs-cam · 12-28-2004, 10:04 PM

You could try having a play with xvidtune

Dark_Helmet · 12-28-2004, 10:16 PM

I wasn't aware of that utiliy.

Unless I'm missing something, I can't adjust the vertical refresh rate. There are controls for just about everything else though. Maybe I missed something scanning over the man page...

EDIT:
Errr... I'm a moron. Use the xvidtune to produce the modeline, and then manually edit the vertical refresh...