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List:       netbsd-current-users
Subject:    Re: Horrible Screen Flashes
From:       Chris Tribo <t1345 () hopi ! dtcc ! edu>
Date:       2001-05-31 15:35:47
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On Thu, 31 May 2001, tiger shiao wrote:

> I'm using NetBSD 1.5 on a Dell OptiPlex GX110, with i810 
> video-on-motherboard. I'm using XFree86 4.0.2 with a package I got from this 
> list(agppart.o?). Recently, when i "startx", my screen "flashes" once a 
> while(it's like a lightening from inside my screen, with a sound,seems the 
> hardware is not funcationing well), then i return to text mode, but this 
> morning i found the same problem under text mode, i'm scared to death and 
> switched to linux &window nt(multiboot system), but all my stuff is really 
> on NetBSD, what should i do?
> 
> for the screen, i configured the frequency--vertical and horizontal 
> correctly, i believe.
> 
> save my life...

	This sounds like screen arcing, or your deflection circuitry is
about to bite the dust. Any monitor made within the last 5 years should
have oversync protection, and would not allow itself to be
oversync'd. It's more likely that this is a problem with the monitor and
having nothing to do with the computer or OS. That being the case, you
should probably have it inspected by a "qualified technician."


	Chris

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