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Date:      Fri, 28 Oct 2005 02:38:35 -0700
From:      Colin Percival <cperciva@freebsd.org>
To:        Alexander Leidinger <Alexander@Leidinger.net>
Cc:        current@freebsd.org
Subject:   Re: TSC instead of ACPI: powerd doesn't work anymore (to be expected?)
Message-ID:  <4361F19B.5090902@freebsd.org>
In-Reply-To: <20051028112833.7vs98zpvy808s04k@netchild.homeip.net>
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Alexander Leidinger wrote:
> I switched the timecounter used to use the TSC instead of the ACPI one
> (/etc/sysctl.conf). After rebooting powerd refused to start. I removed the
> line which changes the timecounter in sysctl.conf and powerd starts again.

I haven't been keeping track of cpufreq lately, but I added a check into
my est driver a long time ago to make it return EBUSY if the TSC is being
used as a timecounter.  This is important because otherwise all sorts of
Bad Things could happen when the clock stops running at the expected rate.

Colin Percival
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