Date: Sun, 18 Apr 2010 09:32:45 +0000 From: Andreas Nilsson <andrnils@gmail.com> To: Dan Lukes <dan@obluda.cz>, freebsd-acpi@freebsd.org Subject: Re: C-states on core-i7m Message-ID: <p2he31a2e1004180232ra36a0b97sa1983666955db33@mail.gmail.com> In-Reply-To: <4BCAD073.30503@obluda.cz> References: <o2me31a2e1004180152oe15684ffxc39e7d0e0ea6f4d@mail.gmail.com> <4BCAD073.30503@obluda.cz>
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On Sun, Apr 18, 2010 at 9:27 AM, Dan Lukes <dan@obluda.cz> wrote: > Andreas Nilsson wrote: > > my new laptop has a core-i7 620m and I expected it to have support for > > C3-state. > > > dev.cpu.0.cx_supported: C1/3 C2/245 > > My notebook announce the C3 state support only running on batteries, but > not on AC. I assume it's not bug, it's "by design" behavior. > > Dan > > I grabbed that output while running on batteries, having booted the laptop on batteries. Do you ever see it actually use a lower C-state? I guess it might be a bios-issue too, this is a Lenovo t510 which seems to have a pretty screwed up bios so far. Andreas
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