Re: Changing refresh rate
From: Dances With Crows (danSPANceswitTRAPhcrows_at_gmail.com)
Date: 03/21/05
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Date: 21 Mar 2005 18:38:10 GMT
On 21 Mar 2005 07:37:46 -0800, petermcmillan_uk@yahoo.com staggered into
the Black Sun and said:
> Dances With Crows wrote:
>> On 14 Mar 2005 13:00:55 -0800, petermcmillan_uk@yahoo.com staggered
>>> I've just installed Slackware 10.1. Both ran at a max of 85Hz.
>>> Even in the graphical refresh rate editor it only list upto 100Hz.
>>> I've edited the config file. I set the monitor refresh rates,
>> How? Did you put in a custom Modeline, or what? You should post
>> your xorg.conf to your webspace and follow up to this message with a
>> URL that points there, so everybody who's interested can look at it.
>> /var/log/Xorg.0.log may also be useful.
>>> My hardware is more than capable of 100Hz at the resolution, and
>>> Windows can do it anyway. Any ideas?
>>
>> X is conservative wrt the modes it uses to drive monitors. web-based
>> Modeline generator at
>> http://koala.ilog.fr/cgi-bin/nph-colas-modelines ;
>> Option "IgnoreEDID" "true"
>> in the Device section of your xorg.conf , because if that's not
>> there, it may not use the Modeline you define.
>>
>>> I'd like to use Linux as my main OS, but recently I've been having
>>> to use over VNC (85Hz is too flickery for me).
>> ? Whoa. You must have serious problems when you're using other
>> people's computers or watching TV and movies, then. (Back in the
>
> Argh, I just tried adding a modeline, and it messed up. It went to
> 1280x1024 @ almost 150Hz :-o. The vertical rate was fine, but the
> Horizontal was 134KHz, which is 2KHz more than my monitor can do. So
> I'm not sure what to do.
Comment out the Modeline you defined, go back to the generator, adjust
the values you entered for various things downward a bit, generate
another Modeline, try that one out. Iterate until you get something
that works. ISTR there's some way you can pull the Modeline data from
the Windows "monitor driver", but I've never tried that.
> My monitor didn't complain or anything though, and it was nice to see
> it not flickering for once. I obviously don't like to run it higher
The days of the "killer poke" are over, since modern monitors have a
cutoff circuit that kicks in if you try to drive the monitor over the
frequencies that it can handle. HTH,
-- Matt G|There is no Darkness in Eternity/But only Light too dim for us to see Brainbench MVP for Linux Admin / mail: TRAP + SPAN don't belong http://www.brainbench.com / Hire me! -----------------------------/ http://crow202.dyndns.org/~mhgraham/resume
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