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Date:      Wed, 15 Jul 1998 08:40:44 -0700 (PDT)
From:      david.myers@Corp.Sun.COM
To:        freebsd-smp@FreeBSD.ORG
Subject:   PCI Write Combining?
Message-ID:  <199807151540.IAA15522@concord.Corp.Sun.COM>

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Folks:

Anybody notice that enabling PCI write combining (the so-called
"fastvid" hack) causes the SMP kernel to lock up solid once X is
running?  In text mode, the kernel seems stable, but once X is started,
it's like a counter starts ticking, and within about five minutes, it
freezes.

Disabling write combining lets X run without any difficulties.

Known bug?  I'm running SNAP-980523 on a Tyan 1662 with 5.01(?) BIOS. 

-David.



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