kern/77805: Boot hangs with ACPI enabled
Nate Lawson
nate at root.org
Sun Feb 27 03:05:50 GMT 2005
Ron Johnson wrote:
> Any help would be appreciated! dmesg output and ASL are in the bug
> report.
>
> http://www.freebsd.org/cgi/query-pr.cgi?pr=77805
>
> With ACPI enabled, boot fails at "hw.acpi.cpu.cx_lowest: C1 -> C3". This
> statement is not in sysctl.conf or loader.conf and appears to be changed
> automatically. No issue in all previous 5.X versions. 5.3-STABLE
> downloaded from CVS on 2/19/2005 around 3pm EST.
You want to change the performance/economy settings in rc.conf. Man 5
rc.conf
The defaults were changed between 5.2.1 and 5.3:
src/etc/defaults/rc.conf:revision 1.206
date: 2004/05/29 04:52:37; author: njl; state: Exp; lines: +1 -1
Throw the switch and enable use of the lowest idle states while online in
addition to offline. This can be overridden in /etc/rc.conf if it causes
trouble although this has been stable since 2003/12.
I have no idea why C3 is unstable on your machine. Please try
overriding this with something like this and see if it helps:
performance_cx_state=HIGH
economy_cx_state=HIGH
--
Nate
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