From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 13170] Macbook 5,2 only boots with acpi=off, or nosmp, or
maxcpus=1
Date: Sat, 20 Aug 2011 12:30:04 GMT
Message-ID: <201108201230.p7KCU4bg027420@demeter2.kernel.org>
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https://bugzilla.kernel.org/show_bug.cgi?id=13170
--- Comment #66 from dentament 2011-08-20 12:30:02 ---
I've found out the cpu frequency scaling bug I mentioned in my comment is not a
bug (well, not a linux bug): it's a macbook "hardware feature" (or flaw?: I
can't understand why it's set up this way) to lock the 2 cpu cores to minimum
speed (1.60ghz) if the battery is not present, as in my case (I removed it
since I mostly use the laptop as a desktop and wanted to preserve it).
With the battery mounted, the frequency scaling behaves normally.
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