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#1 2010-01-23 23:10:26

johnrl
Member
Registered: 2010-01-23
Posts: 12

[ANSWERED] Fan speed on HD4890 with open source ATI drivers?

Hi everyone.
Is it possible to control the fan speed of my HD4890 card with the opensource ATI drivers (xf86-video-ati or xf86-video-radeonhd)?
My HD4890 fan is really loud with both for no apparent reason (the temp is not THAT high). The fan is silent with the fglrx driver as well as on Windows 7.

Greets,
John

Last edited by johnrl (2010-01-24 11:44:28)

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#2 2010-01-24 07:41:20

Dheart
Member
From: Sofia, Bulgaria
Registered: 2006-10-26
Posts: 956

Re: [ANSWERED] Fan speed on HD4890 with open source ATI drivers?

Initial power management support for xf86-video-ati should be coming with 2.6.33 kernel but untill that there's no way to control fan speed besides using fglrx


My victim you are meant to be
No, you cannot hide nor flee
You know what I'm looking for
Pleasure your torture, I will endure...

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#3 2010-01-24 11:43:07

johnrl
Member
Registered: 2010-01-23
Posts: 12

Re: [ANSWERED] Fan speed on HD4890 with open source ATI drivers?

Sounds good! I guess Ill have to degrade Xorg until the 2.6.33 kernel appears, or AMD releases a new fglrx - which I read probably won't happen until the next Ubuntu release.

Thanks for the answer.

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#4 2010-05-06 08:57:16

McFlow
Member
Registered: 2010-04-17
Posts: 58

Re: [ANSWERED] Fan speed on HD4890 with open source ATI drivers?

Sorry to dig that out. It's possible now.
You need the xf86-video-ati-git from aur.
Add the two options in xorg.conf to your device section

Option "ForceLowPowerMode" "true" 
Option "DynamicPM" "true"

If you have the git drivers installed you can check the man page for what exactly this two options do. With the xf86-video-ati my fan was always blowing at 100%, which is quite annoying especially for a laptop.
With this two options from the git driver it is better. Not as silent as on windows but much better than before.
I don't know what happens, when it gets suddenly load, from a game or something though.

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