Mailinglist Archive: radeonhd (427 mails)

["David C. Rankin, J.D.,P.E." <drankinatty@xxxxxxxxxxxxxxxxxx>]

On or about Wednesday 20 May 2009 at approximately 15:35:32 Yang Zhao 
composed:
> 2009/5/20 David C. Rankin, J.D.,P.E. <drankinatty@xxxxxxxxxxxxxxxxxx>:
> >        The log now shows that ForceLowPowerMode was used to set the clock
> > at 100000 Mhz. The heat is reduced, but not by as much as I had hoped.
> > Originally I had tried to set "LowPowerModeEngineClock" "50000", but when
> > X started, the screen was wildly distorted and "stretched?" so that the
> > kdm login was at the far right side of the screen.
> >
> >        Can I just pick a number that isn't a direct multiple/factor of
> > the full power clock of say 70000?
>
> Any sensible value should work. The algorithm in AtomBIOS seems to
> automatically adjust it to a nearby possible value if the exact
> specified clock can't be achieved.
>
> --
> Yang Zhao
> http://yangman.ca

Yang,

        Here is a final bit of follow-up on this thread. In summary fashion:

"LowPowerModeEngineClock" "50000"

        X would start, but was unreadable with all information pushed off the 
right 
side of the display;

"LowPowerModeEngineClock" "100000"

        X starts and works fine with kdm. Heat load and fan noise were reduced, 
but 
not by very much. Notable slowness on compiz-fusion splash on compiz start 
and cube rotate. Laptop palmrest still uncomfortably warm compared to fglrx 
driver.

"LowPowerModeEngineClock" "200000"

        Heat load and fan noise increased, no perceptible slowness in compiz 
splash 
but slow cube rotation compared to full clock of 400000.

        Thank you for all your help. I am now set up to test the radeonhd 
driver and 
I'm happy to  do it. As mentioned before, if I can send or post anything 
else, just let me know. I have posted the latest Xorg.0.log at:

http://www.3111skyline.com/download/linux/radeonhd/downclock/Xorg.0.log.20220427

        Great driver and much needed now with the fglrx driver going away for 
so many 
users. 

-- 
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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