Mailinglist Archive: radeonhd (426 mails)

["Bridgman, John" <John.Bridgman@xxxxxxx>]

Does anyone know if radeonhd turns on clock gating for this chip, either by 
default or with an option ? 

-----Original Message-----
From: David C. Rankin [mailto:drankinatty@xxxxxxxxxxxxxxxxxx] 
Sent: Friday, May 29, 2009 12:58 PM
To: radeon
Subject: Re: [radeonhd] [PATCH] PM patches: logic fix, feature, cleaning, 
memory downclocking

Rafał Miłecki wrote:
> 2009/5/29 David C. Rankin, J.D.,P.E. <drankinatty@xxxxxxxxxxxxxxxxxx>:
> > Rafał,
> >
> >        That's what I needed to know. I'm am not familiar with 'git' 
> > and the
> >
> > git checkout -t -b downclocking origin/master git am 
> > ~/archlinux/radeonhd/patches/*patch
> >
> > parts were the parts I knew nothing about. I'll pull the patches, 
> > apply and report back. Something really has to give here. The heat is 
> > unbearable. To get the actual temp data, I have a digital multimeter 
> > with a great surface temperature probe on it ( Craftsman Model No. 
> > 82400 ) and I took the temperature readings on the left palm rest and 
> > left fan discharge of my laptop with the radeonhd driver active. The results:
> >
> > Left Palm Rest Temp: 96 Deg. F
> >
> > Left Fan Discharge: 147 Deg. F
> >
> >        The inside of this box is cooking.... That's with:
> >
> >  Option       "ForceLowPowerMode"
> >  Option       "LowPowerModeEngineClock" "140000"
> >
> >        I'll keep my fingers crossed and report back.
>
> Nice, tests with your multimeter would be absolutely great. You may 
> also try to reduce EngineClock later. For example change it from 
> 140000 to 120000. If it doesn't cause any corruptions you can still 
> try decreasing that. Don't worry about values you may use 139999, 
> 139998, 139997, end so on.AtomBIOS will round it to something 
> acceptable.

Rafał,

        I have created a baseline temperature comparison for testing purposes. 
It is located at:

http://www.3111skyline.com/download/linux/radeonhd/temp-comparison

        Here is the baseline:

                             Temperature Comparison
                          Between the ATI/fglrx driver
                            and OSS radeonhd driver

Hardware:

    Toshiba P205D; AMD Turion(tm) 64 X2 Mobile Technology TL-58
    ATI Technologies Inc RS690M [Radeon X1200 Series]
    RAM: 4G

Driver/Operating Systems:

    fglrx (Ver. 8.532; 8-9 Release) - openSuSE 11.0; KDE3; Compiz

    radeonhd - Archlinux; KDE3; Compiz

        git checkout -t -b downclocking origin/master
        git am patches/*patch
        vi src/rhd_pm.c (set: #if 1)
        Log confirmation:

            (II) RADEONHD: version 1.2.5, built from git branch downclocking, 
commit 0de8b484 + changes

Operating Temperatures:

    fglrx - openSuSE

        Left Palm Rest Temp: 89 Deg. F

        Left Fan Discharge: 122 Deg. F


    radeonhd - Archlinux

        Left Palm Rest Temp: 96 Deg. F

        Left Fan Discharge: 147 Deg. F



--
David C. Rankin, J.D.,P.E.
Rankin Law Firm, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
Telephone: (936) 715-9333
Facsimile: (936) 715-9339
www.rankinlawfirm.com
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