Date: Wed, 5 Sep 2012 10:41:20 -0700 From: Kevin Oberman <kob6558@gmail.com> To: Andriy Gapon <avg@freebsd.org> Cc: freebsd-acpi@freebsd.org Subject: Re: improve cx_lowest logic Message-ID: <CAN6yY1ts=%2BRmyL5LkNMxaaanr2ffgnSXweakSaByACFhVjdAhA@mail.gmail.com> In-Reply-To: <50477E9F.7030604@FreeBSD.org> References: <4FF95F79.30309@FreeBSD.org> <1341935370.4493.4.camel@powernoodle> <4FFFD891.2060109@FreeBSD.org> <CAL409Kye_8t6pG3_XxeQrEt5Oe2Mqd9Verxc6167f=eg3EcCng@mail.gmail.com> <5046F105.80706@FreeBSD.org> <CAN6yY1uq%2BzRWyBNEpsdRAKE-vq9JoFd-0YVQsB-U%2BN6POOyGJA@mail.gmail.com> <504779D8.4030909@FreeBSD.org> <CAN6yY1uE%2BCyHBnGwBpiur1hrKz3ZEfg1eku=i8_1diZYhPzXcw@mail.gmail.com> <50477E9F.7030604@FreeBSD.org>
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On Wed, Sep 5, 2012 at 9:32 AM, Andriy Gapon <avg@freebsd.org> wrote: > on 05/09/2012 19:23 Kevin Oberman said the following: >> On Wed, Sep 5, 2012 at 9:12 AM, Andriy Gapon <avg@freebsd.org> wrote: >>> on 05/09/2012 18:17 Kevin Oberman said the following: >>>> Thanks so much! This should finally make Cx states work on my >>>> ThinkPad! I really appreciate it. Guess it's time to do my weekly >>>> upgrade of this system. >>> >>> I haven't sneaked in that other commit :-( >> >> Oops! :-( >> >> Oh, well. At least it should make it to /base/stable/9 soon. Right??? >> (I only run release/ or releng/ or for an occasional test.) >> > > It's already in stable/9 :) Ahh! I now see C3/109, but I see some strange behavior. When on AC power, only C1/1 and C2/104 are available, but cx_lowest is C3, even though C3 is not available. If I switch to battery, C1/1, C2/80 and C3/109 are available (???), but cx_lowest is set to C2. I find the Cx value sets a bit odd, but the setting of cx_lowest appears to be a bug, at least to me. I can manually set cx_lowest to C3 and I actually use C3. My suspicion is that there is either a race or a logic issue where x_lowest is reset to the lowest value before the available Cx values are set, so cx_lowest is always set the the lowest Cx state from the previous power configuration. (This is a guess, but it fits what I am seeing very well.) -- R. Kevin Oberman, Network Engineer E-mail: kob6558@gmail.com
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