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Re: Monitor vertical refresh rate setting in X.



On Wed, 24 Nov 2010 13:59:32 +0700, Sthu Deus wrote:

> Thank You for Your time and answer, Camaleón:
> 
>> Have you tried with modeline+cvt?
>> 
>> cvt 1024 768 85
> 
>> Will output the Modeline stanza to add to your "xorg.conf" file (IIRC,
>> it goes under "Monitor" section).
> 
> How to use it? Can You bring post here an example? - After reading the
> manual it gave me almost no any info - for I do understand a lot of
> those circles-related parameters.

First, you have to run the above command (I'm using here the output I get 
just as sample, yours should be different):

sm01@stt008:~$ cvt 1024 768 85
# 1024x768 84.89 Hz (CVT 0.79M3) hsync: 68.68 kHz; pclk: 94.50 MHz
Modeline "1024x768_85.00"   94.50  1024 1096 1200 1376  768 771 775 809 -hsync +vsync

Which will tell the Modeline line you have then to add to your Monitor 
section of "/etc/X11/xorg.conf" (my Monitor stanza is quite simple):

Section "Monitor"
	Identifier	"Configured Monitor"
        Modeline        "1024x768_85.00"   94.50  1024 1096 1200 1376  768 771 775 809 -hsync +vsync
EndSection

After that, restart the X server (I never remember how does one restarts 
X server in Debian, but jumping to tty, falling into "init 1" and then 
running "startx" should do the trick)... or reboot O:-)

Additional data:

III.5. Forcing a preferred mode
http://wiki.debian.org/XStrikeForce/HowToRandR12

Note: be sure your monitor/VGA card is capable to handle that resolution/
frequency combo, if not you can get an "out-of-sync" message.

Greetings,

-- 
Camaleón


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