Kris Kennaway wrote:
On Mon, Mar 13, 2006 at 09:03:35AM -0800, Nate Lawson wrote:
I finally managed to test this in RELENG_6. The system performance is
not obviously bad, but sound playback is distorted (e.g. the 'bell' in
KDE is much higher pitched than it should be, and on the console it is
low pitched and lasting about 3 seconds). Nothing is logged on
console.
There may be other problems that I didn't notice right away, but the
sound problems were enough to make me turn it off again.
Are you sure that's the cause? (Does setting cx_lowest to C1 fix it?)
Absolutely sure: the system worked at C1 after boot, then I set it to
C2, observed that beeping was broken, then set it back to C1 and
observed that it worked again.
Ok, good to know. This looks like a different failure mode where
occasionally the system is waking up from the idle too often, but not
enough to affect system performance.
Can you send the output of sysctl hw.acpi so we can see how often each
cx type is being run?
hw.acpi.cpu.cx_supported: C1/0 C2/1
hw.acpi.cpu.cx_lowest: C1
hw.acpi.cpu.cx_usage: 100.00% 0.00%
I'd like to see it after you've set it to C2 for a few minutes. I'm
looking to see what happens with cx_usage.
--
Nate
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