Date: Sun, 18 Dec 2005 20:46:49 +0100 From: martinko <martinkov@pobox.sk> To: Kevin Oberman <oberman@es.net> Cc: martinko <martinkov@pobox.sk>, Melvyn Sopacua <freebsd.stable@melvyn.homeunix.org>, freebsd-stable@freebsd.org Subject: Re: HEADS UP: Release schedule for 2006 Message-ID: <43A5BCA9.3090105@pobox.sk> In-Reply-To: <20051218001359.46E495D07@ptavv.es.net> References: <20051218001359.46E495D07@ptavv.es.net>
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Kevin Oberman wrote: >>Date: Sat, 17 Dec 2005 18:14:01 +0100 >>From: martinko <martinkov@pobox.sk> >> >>Kevin Oberman wrote: >> >> >>>>Date: Fri, 16 Dec 2005 14:29:39 -0600 >>>>From: Craig Boston <craig@feniz.gank.org> >>>>Sender: owner-freebsd-stable@freebsd.org >>>> >>>> >>>> >>>> >>>>>-cpu0: <ACPI CPU (4 Cx states)> on acpi0 >>>>>+cpu0: <ACPI CPU> on acpi0 >>>>> >>>>>Q: Guessing that's a formatting difference, rather then 6.x not recognizing >>>>>the states (sysctl hw.acpi.cpu.cx_supported confirms 4 states) >>>>> >>>>> >>>>Not sure on this, but you're probably better off using EST anyway as I >>>>think it gives you more control over the processor frequency. >>>> >>>> >>>No. There is no conflict between Cx states and EST. Cx states specifies >>>how deeply the CPU will sleep when idle. EST controls processor speed >>>and voltage. In most cases, your REALLY want to use both of these. They >>>are very significant in saving power. (Of course, USB tends to limit the >>>effectiveness of Cx states. I need to run without USB to get really good >>>battery life and to make suspend (S3) really ut power drain. >>> >>> >>Kevin, >> >>I used to have 3 Cx states supported when I started with FreeBSD on >>version 5.3. Since I upgraded to 5.4 and recently to 6.0, all I can see >>is just one supported Cx state. I much wonder why. (?) >> >> > >What value do you have in /etc/rc.conf (if any) for >performance_cx_lowest? It defaults to HIGH which will limit you to only >the most power hungry sleep state (simple halt). This was made the >default because some hardware was breaking when this was defaulted to >LOW. T0 get other Cx states to be utilized, add >'performance_cx_lowest="LOW"' to /etc/rc.conf. > > i see. anyway: # grep cx /etc/rc.conf.local economy_cx_lowest="LOW" performance_cx_lowest="LOW" still: # sysctl hw.acpi.cpu hw.acpi.cpu.cx_supported: C1/1 hw.acpi.cpu.cx_lowest: C1 hw.acpi.cpu.cx_usage: 100.00% and, imho, cx_supported should list all available states, doesn't matter what is in rc.conf. (well, at least i reckon it's supposed to work that way.) but: i already had 3 Cx states back on 5.3. and when i had them, C2 was used most often (and C3 wasn't at all iirc). so what has changed in the system please and how am i to get back my states please ?? many thanks, martin
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