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Old 10-02-07, 11:19 AM   #1
fredericva
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Default Performance issues with 8400M GS

I'm having performance issues similar to those described in this thread: http://www.nvnews.net/vbulletin/showthread.php?t=96778

However, the .19 driver did not fix it for me.

When compiz is running, 3D performance deteriorates quickly until I perform some action that uses 3D for a few seconds, which resets the performance to what it should be. When I stop doing anything 3D intensive, performance drops quickly again.

I can run quake4 at full settings fluently, so my 3d acceleration seems to be ok. Maybe the Powermizer function is messing up here?
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File Type: log nvidia-bug-report.log (118.6 KB, 259 views)
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Old 10-02-07, 01:03 PM   #2
fredericva
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Default Re: Performance issues with 8400M GS

Ok, I found out that GPUCurrentClockFreqs decreases to GPU2DClockFreqs when no intensive 3D is taking place. When some 3D processing is required, it jumps up to GPU3DClockFreqs again, but for compiz, it sometimes lags behind a few seconds, or doesn't increase at all.

Is there a way to circumvent this behavior until it's properly fixed in the driver?
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Old 10-10-07, 09:32 AM   #3
taqti
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Default Re: Performance issues with 8400M GS

Quote:
Originally Posted by fredericva
I'm having performance issues similar to those described in this thread: http://www.nvnews.net/vbulletin/showthread.php?t=96778

However, the .19 driver did not fix it for me.

When compiz is running, 3D performance deteriorates quickly until I perform some action that uses 3D for a few seconds, which resets the performance to what it should be. When I stop doing anything 3D intensive, performance drops quickly again.

I can run quake4 at full settings fluently, so my 3d acceleration seems to be ok. Maybe the Powermizer function is messing up here?
I'm having the exact problem as you on my 8400M G. And i also think that this guy's first problem is the same.

Moreover, in my inquiry on the compiz-forums another one seems to have the same problem.

More examples:
http://ubuntuforums.org/showthread.php?p=3507606
http://ubuntuforums.org/showthread.php?p=3463466


So it seems this is a general problem with the 8-series in linux?

To anyone from NVIDIA:
Will this be fixed in a driver update? Is there a temporary solution which we can make?

Thank you in advance

/taqti
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Old 10-10-07, 07:35 PM   #4
fredericva
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Default Re: Performance issues with 8400M GS

I installed XP on my system today after being a bit too annoyed by the vista performance problems I still have (stutter/ridiculously low fps in *all* games), and in the XP nvidia control panel I can now disable powermizer. Will this functionality come to the linux driver/cpanel too?
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Old 10-12-07, 09:11 PM   #5
taqti
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Default Re: Performance issues with 8400M GS

*bump*

It would be nice if someone from NVIDIA at least confirms the problem..
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Old 10-13-07, 10:46 PM   #6
starcannon
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Unhappy Re: Performance issues with 8400M GS

Same problem here on HP Pavilion dv2600 Notebook.
Hope they fix it soon, or that vendors would offer 7xxx series cards in the mean time.
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Old 10-19-07, 01:02 PM   #7
taqti
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Default Re: Performance issues with 8400M GS

Yeah I hope so too..


@NVIDIA
Help please...

Oh, and I updated BIOS and drivers, still the same...
Attaching the bug-report too..
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File Type: log nvidia-bug-report.log (109.1 KB, 250 views)
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Old 10-28-07, 07:31 AM   #8
theophane
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Default Re: Performance issues with 8400M GS

Hello folks,

I having the same problems as you guys. Compiz Fusion runs slow with an Nvidia 8400m GS on an Acer Aspire 7720G.
Installing the latest nvidia driver (100.14.23) didn't make it any better.

I'm pissed, because this graphic card is the reason why I purchased my laptop, I wanted Compiz Fusion to be kickass, which is -unfortunately- not the case.

If someone has a solution, well, post it !

Cheers
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Old 12-14-07, 02:57 PM   #9
livincali
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Default Re: Performance issues with 8400M GS

Possible solution?

This problem also occurs in Windows Vista. There are three performance states, and as soon as the system is idle for a short period of time, the performance state drops, and drops. The aero interface goes to crap until clocks come back to speed.

There is a solution in windows, using RivaTuner, you can set it to "Enable Force Constant Performance Level" After doing so, you can view nvmonitor and it will show the clocks remaining at 400/600, or whatever you have it OC'd to. This completely fixes the lag after idle.

The question is, how to enable this feature in Linux. I'm no linux expert but I can imagine, that if you are, you would be able to use the information to replicate its function under the linux driver, assuming the driver isn't TOO different.

This is as much information as I could find in regards to the RivaTuner Windows solution. If it is not enough please ask for more, or try RivaTuner yourself, I would really appreciate some worth while compiz fusion performance and with your help this may be possible.


Driver:
Vista 32-bit 169.12.
*Note, this driver is different than its predecessor. Overclocking has been enabled in this driver, and prior to this, the only drivers which had such a function were 158.36 and below. Also independent shader clock control was added to the driver. I do believe, however, that the older drivers (158.36 and below) can still enable "Force Constant Performance Level" using RivaTuner.

The registry key where this function is located:
HKEY_LOCAL_MACHINE\Software\Unwinder\RivaTuner\NVI DIA\Overclocking

KeyName:
EnablePerfLevelForcing

RivaTuner Documentation for key:
Default value : 0x0 (0 decimal, 0.000000 float)
Set this entry to 1 to unlock 'Force constant performance level' option.

My Hardware and OS:
Dell XPS M1330, Nvidia 8400M GS, Vista Ultimate 32-bit

How to Access EnablePerfLevelForcing in RivaTuner:
Main window, click the Power User tab. Then find RivaTuner\NVIDIA\Overclocking. This, for obvious reasons, can also be done directly to the registry with regedit.

Thanks for reading,
John
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Old 12-15-07, 02:39 PM   #10
Sayonara
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Default Re: Performance issues with 8400M GS

try this:

in terminal run:
# while true; do nvidia-settings -q all > /dev/null; sleep 25; done

this seems to stick PowerMizer at maximal performance level
I have no time to track this down yet.

card: Quadro 1600M
driver: x86_64-169.04

watch out do not burning your gpu
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Old 12-16-07, 03:28 AM   #11
theophane
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Default Re: Performance issues with 8400M GS

Quote:
Originally Posted by Sayonara
try this:

in terminal run:
# while true; do nvidia-settings -q all > /dev/null; sleep 25; done

this seems to stick PowerMizer at maximal performance level
I have no time to track this down yet.

card: Quadro 1600M
driver: x86_64-169.04

watch out do not burning your gpu
Man, I've been looking around for a hack over the last 3 without any luck.
This seems to fix the whole thing for me.

Thank you !
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Old 12-16-07, 06:22 PM   #12
epsilon72
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Default Re: Performance issues with 8400M GS

Won't something like this adversely affect battery life though? (assuming you're not plugged into the wall?)

I ordered a Dell Vostro 1400 with a 8400M GS that should be here around the new year. Is this a problem only with compiz/beryl?

I don't use fancy composite wm's really that much (I use fluxbox most of the time) - but I do use wine to play games occasionally when I don't want to boot into windows. Will 3D performance in wine be hindered without this workaround?
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