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Date:      Fri, 10 Sep 2010 12:06:35 +0930
From:      "Daniel O'Connor" <doconnor@gsoft.com.au>
To:        freebsd-stable Stable <freebsd-stable@freebsd.org>
Cc:        "John H. Baldwin" <jhb@freebsd.org>
Subject:   Enabling MCA causes system hangs
Message-ID:  <E0962551-398E-49C7-BFB6-496AB58B2779@gsoft.com.au>

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Hi,
I recently tried enabling MCA (ie w.mca.enabled=3D1 in loader.conf) on =
an 8.0-STABLE system and found that it would cause the system to hang =
after a few minutes of uptime.

The screen would go black and the monitor would turn off (regardless of =
wether it was in X or not) and only a hard reset would bring it back.

Also I found that quite often I had to power cycle the whole PC or the =
BIOS wouldn't detect the hard disks on boot(!) after a hang.

uname is..
FreeBSD midget.dons.net.au 8.0-STABLE FreeBSD 8.0-STABLE #6 r202903M: =
Sun Jan 24 13:45:11 CST 2010     =
darius@midget.dons.net.au:/usr/obj/usr/src/sys/MIDGET  amd64

The motherboard is a Gigabyte GA-MA785GM-US2H with an Athlon II X2 240 =
CPU & 4Gb of RAM.

--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C









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