Date: Fri, 25 Feb 2005 21:55:10 +0100 From: Morten Rodal <morten@rodal.no> To: Nate Lawson <nate@root.org> Cc: current@freebsd.org Subject: Re: HEADSUP: cpufreq import complete, acpi_throttling changed Message-ID: <200502252155.17111.morten@rodal.no> In-Reply-To: <421E403E.7040804@root.org> References: <42068A5C.1030300@root.org> <200502241710.44321.morten@rodal.no> <421E403E.7040804@root.org>
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On Thursday 24 February 2005 21:59, Nate Lawson wrote:
> Morten Rodal wrote:
> > On Wednesday 23 February 2005 20:24, Nate Lawson wrote:
> > The issue is partly fixed. I now see the following frequency levels
> > if, and only if, I booted the laptop on battery power:
> >
> > # sysctl dev.cpu.0.freq_levels
> > dev.cpu.0.freq_levels: 1200/0 1050/0 900/0 787/0 750/0 656/0 600/0
> > 562/0 525/0 450/0 393/0 337/0 300/0 262/0 225/0 187/0 150/0 112/0
> > 75/0 37/0
> >
> > Note that the native processor speed (1700 MHz) is not listed, and
> > setting the speed below 150 hard-hangs/freezes the laptop.
>
> Not sure we can fix this one. It appears some very low clock rates
> hang some systems. Can you test with SCHED_4BSD?
>
This is with SCHED_4BSD. I have been using that since it became the=20
default again in -CURRENT.
> > When booting with AC-power the laptop does not report any
> > freq{,_levels}. It does not matter if I remove the AC-power once the
> > computer is up and running, I always get this:
> >
> > # sysctl dev.cpu.0.freq
> > dev.cpu.0.freq: -1
>
> I just committed a fix for this.
With sources from 18:56 CET I get this list:
# sysctl dev.cpu.0.freq_levels
dev.cpu.0.freq_levels: 1700/0 1487/0 1301/0 1275/0 1200/0 1115/0 1062/0=20
956/0 920/0 900/0 850/0 796/0 750/0 663/0 637/0 600/0 557/0 531/0 478/0=20
450/0 425/0 398/0 371/0 337/0 300/0 265/0 238/0 212/0 185/0 150/0 112/0=20
79/0 53/0 26/0
If I boot the computer using battery power I get the same frequencies as=20
posted earlier. I did however remember one thing about the ACPI support=20
on this Dell Inspiron (or maybe a bad hardware design), and that was=20
people complained that the CPU was stuck at a maximum of 1200 MHz if it=20
was started using battery power and then later have the power connected=20
again. So that might explain why I do not see 1700 MHz as a choice=20
unless I start it with the AC-power connected. Rebooting the computer=20
does solve the problem, so it might just be a minor problem with the=20
frequency levels only being read once (at boot).
=2D-=20
Morten Rodal
"A supercomputer is a device for turning compute-bound
problems into I/O bound problems." -- Ken Batcher (Goodyear Aerospace)
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