flat monitor help needed

manniac · n00b Joined: 17 Jul 2002 Posts: 40 Location: California

Recently i got a viewsonic viewpanel (VA800) and it works very good with gentoo but i have this behaviour when x starts that i cannot fix. hence i submit to you, gurus of the hardware forum.

when x starts it displays this pattern made of black and white dots, like a lattice, then x comes up. whenever this "lattice" pattern is displaying the monitor shows like static, that's for lack of better words the best way i can describe it.

if i attempt to use let's say xterm, which has a lattice patterned scrolbar i can see the same effect only on the scrollbar area. same when i use vmware to run windows and i shut down the session and windows displays this kind of pattern.

i have a laptop also running gentoo and i doesn't do the same.

how do i get read of this? is it timings? bad freqs on the XF86Config?

any help is appreciated.

-Manniac

Carlos · Posted: Fri Feb 07, 2003 2:07 am Post subject:

It definitely sounds like timing/freq settings. Where are you getting the frequency and timing info?

For starters, I'd suggest trying smaller resolutions and more conservative frequency ranges and see if the problem persists.
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manniac · n00b Joined: 17 Jul 2002 Posts: 40 Location: California

thanks for your reply, Carlos.

I took the configuration from the monitor manual, then tryied the more conservative Horizotal and Vertical values that xf86config recommends for flat pannels.
HorizSync was 30-82 (as per the manual) then 31.5-64.3 as per xf86config.
VertRefresh was 50-75 on the manual and remained that way, even as xf86config recommends 50-70.

At any rate the "static" still persists with both configurations.

I run the monitor on it's native resolution of 1280x1024. It actually looks better after making the change to the recomended-by-xf86config value of HorizSync.

Unfortunately there is no info on google about this monitor and a working XF86Config.

-Manniac

krt · Posted: Fri Feb 07, 2003 12:10 pm Post subject:

you might want to try setting your VertRefresh to 60hz only. Most panels are only hitting that anyways (they work differently than tubes, 60hz refresh isnt bad on a panel..)

I have this same issue on an nvidia based box.. using analog for the input versus dvi. Ill play with the timings and see what happens.
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