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Date:      Thu, 12 Feb 1998 23:57:30 -0500 (EST)
From:      cgull+usenet-887345169@smoke.marlboro.vt.us (john hood)
To:        "Andrew Atrens" <atrens@nortel.ca>
Cc:        hackers@FreeBSD.ORG
Subject:   pci-ide-dma side effects
Message-ID:  <199802130457.XAA07319@smoke.marlboro.vt.us>
In-Reply-To: <199802101859.KAA19606@hub.freebsd.org>
References:  <199802101859.KAA19606@hub.freebsd.org>

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Andrew Atrens writes:
 > launched X, then ran `Bonnie'. 
 > 
 > What happened next is hard to describe. :)
 > 
 > My X screen was filled with (for want of a better description) `marching ants'.

Mmm.  Quite.

I don't have much information from your report here.  Several
questions:

1) Can I get a full description of your FreeBSD-current variant,
hardware, boot -v log, and copy of your kernel config for this
experiment?  And your XF86 startup messages, too, for good measure?

2) If your machine's PCI bus is overclocked (i.e., system bus is at 75
or 83 MHz), try it within manufacturer and PCI specifications.

3) These "marching ants"-- are they transient, or do they leave trails
in your screen buffer when disk activity ceases?

3) What happens if you try this without X?

  --jh

-- 
Mr. Belliveau said, "the difference was the wise,       John Hood,     cgull
intelligent look on the face of the cow."  He was      	                   @
*so* right.  --Ofer Inbar                               smoke.marlboro.vt.us

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