NVIDIA driver doesn't dynamically change power source

I'm using the NVIDIA driver on an MSI laptop, and I've noticed that it doesn't dynamically detect my power source. The result of this is that if I boot the computer on battery power, then plug it in, the video card will continue to perform at less-than-maximum performance until I reload the driver with modprobe (of course, this is annoying because I have to exit from X11 first, then restart X11 after). This goes the other way, as well; that is, I can boot the machine on AC power, then unplug it and the video card will continue to run as if it were still on AC power. I have the "PowerMizer" configured to "Adaptive" in the settings.
Has anyone else experienced this issue? Any ideas on how to solve it?
Thanks.
Arch x86_64
NVIDIA 195.36.15
MSI MS-1651 laptop
NVIDIA GeForce 9600M GT

Took me a bit to work out why my nvidia card wouldn't behave the way I wanted it to on battery / AC.
I've just achieved the behaviour you're describing working on my Dell laptop (I wanted adaptive on battery, full performance on AC in X).
What works for me is:
Option "RegistryDwords" "PowerMizerEnable=0x1; PerfLevelSrc=0x3322; PowerMizerDefaultAC=0x1"
... in xorg.conf and making sure you have installed acpid and starting it at boot.
It seems the nvidia driver uses acpid to detect if the cable has been pulled or not -- if you don't have acpid running it will always stay at max performance with my xorg.conf device settings listed above.
All I did was install acpid, started it at boot in rc.conf, no acpid configuration at all (i.e. I didn't touch a file except for rc.conf after I installed it), then I found the nvidia driver was able to detect the AC state.
If you want to tweak the settings for an on boot scenario (e.g. runlevel 3, no X), I'm pretty sure you can pass module parameters to get what you want -- however I haven't bothered with that as I'm always in X anyway.
Hope this helps, cheers.
References:
http://tutanhamon.com.ua/technovodstvo/ … IX-driver/
http://wiki.archlinux.org/index.php/Acpid
Last edited by pezz (2010-06-02 16:35:28)

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Hello,
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640 x 480 @ 75Hz (VESA)
640 x 480 @ 72Hz (VESA)
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720 x 400 @ 70Hz (IBM, VGA)
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1024 x 768 @ 75Hz (VESA)
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1024 x 768 @ 60Hz (VESA)
832 x 624 @ 75Hz (Apple, Mac II)
800 x 600 @ 75Hz (VESA)
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Message was edited by: damiensturdy

Hi
>was wondering if Toshiba could explain their choice here.
If you want to hear anything from Toshiba then you have to contact them. This forum is only a user to user forum and unfortunately you will not find anyone from Toshiba here.
But maybe you want to hear my opinion;
>My laptop recently got sent in for repair because it burnt itself out due to me using Nvidias own drivers on my p100-240 (pspa3e).
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As mentioned above the original GPU drivers are not designed for the notebook usage.
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NVIDIA driver doesn't dynamically change power source

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