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PostPosted: Mon Jan 15, 2007 7:39 pm 
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Joined: Mon Aug 01, 2005 9:54 pm
Posts: 77
The cpu load from x.org for me was above 50% when watching high def channels. Since mythfrontend was using the other 50%, I was getting audio stuttering and other problems...

This worked for me on an nVidia 6200:

First, upgrade to the latest nVidia driver using instructions from here:
http://mysettopbox.tv/phpBB2/viewtopic. ... highlight=
(Note, read the whole thread first)

Then, edit the /etc/X11/xorg.conf file and add the line
Option "UseEvents" "True"
To the "Device" section.

I got the information from here: http://www.gossamer-threads.com/lists/m ... ts;#242186

Basically, the problem is that the older nVidia driver is doing a busy wait when waiting for v-sync. The new driver uses a different method that's not processor intensive.

Now, when watching HD content, my x.org hovers at around 7% cpu load.


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PostPosted: Mon Jan 15, 2007 9:27 pm 
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Joined: Fri Nov 18, 2005 9:22 am
Posts: 777
Location: spencerport, ny (USA)
It sounds great, but that nvidia thread scares the crap out of me!
Is there a way to do it without recompiling against the kernel sources?
And is there a reason that the newer nvidia drivers aren't already in R5E50?
It sure would be nice to have a 7% x.org....


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PostPosted: Tue Jan 16, 2007 10:20 am 
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Joined: Mon Aug 01, 2005 9:54 pm
Posts: 77
Downloading the kernel source is the only way I found to do it. If you find a faster way, please post it.

I didn't really have a choice though since I couldn't actually watch HD content unless I made this change. This would probably be a case of "if it ain't broke, don't fix it." If you can watch HD content without problems, then why bother trying this?


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PostPosted: Tue Jan 16, 2007 11:16 am 
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Joined: Mon Nov 28, 2005 9:05 pm
Posts: 200
MrFahrenheit, if you don't mind me asking, what deinterlacing method are you using for HD?

_________________
Knoppmyth 7.02 Kernel 2.6.39-LINHES
[MBE] SilverStone LC-10 HTPC Case, Asus M2NPV-VM, AMD X2 4200+, 1G RAM, Nvidia 9500 PCIe, PVR500 and a HD-PVR - Rockin VDPAU


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PostPosted: Tue Jan 16, 2007 1:30 pm 
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Joined: Fri Nov 18, 2005 9:22 am
Posts: 777
Location: spencerport, ny (USA)
MrFahrenheit wrote:
If you can watch HD content without problems, then why bother trying this?

I have pauses once in a while, especially when recording on all 3 tuners. I'd like to be able to run commflag.
Lower CPU may translate into less heat and noise.
Just a few. But none that make me want to risk having to re-build, and spend a day getting it all running again.


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PostPosted: Tue Jan 16, 2007 1:58 pm 
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Joined: Mon Aug 01, 2005 9:54 pm
Posts: 77
I found that using Kernel with libmpeg2 currently looks the best to me. All de-interlace methods had performance problems. Even turning de-interlace off, I had the same issue.


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PostPosted: Tue Jan 16, 2007 4:28 pm 
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Joined: Sat Mar 04, 2006 11:32 am
Posts: 23
thornsoft wrote:
It sounds great, but that nvidia thread scares the crap out of me!
Is there a way to do it without recompiling against the kernel sources?
And is there a reason that the newer nvidia drivers aren't already in R5E50?
It sure would be nice to have a 7% x.org....


I did the upgrade and it's really not very hard, even if it looks kinda scary.


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PostPosted: Tue Jan 16, 2007 8:21 pm 
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Joined: Wed Nov 16, 2005 8:55 pm
Posts: 1381
Location: Farmington, MI USA
MrFahrenheit wrote:
I found that using Kernel with libmpeg2 currently looks the best to me. All de-interlace methods had performance problems. Even turning de-interlace off, I had the same issue.

MrFahrenheit, what are your system specs? I need to get back to testing a new frontend (Asus M2NPV-VM, A64 3200+) and I don't believe I've tried that combination yet...

Thanks


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PostPosted: Tue Jan 16, 2007 9:09 pm 
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Joined: Mon Aug 01, 2005 9:54 pm
Posts: 77
I'm running a slightly modified version of a dragon v1.1. Same Mobo, proc, vid card, ram, soundcard, and tuner card.


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PostPosted: Tue Jan 16, 2007 9:30 pm 
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Joined: Wed Nov 16, 2005 8:55 pm
Posts: 1381
Location: Farmington, MI USA
MrFahrenheit wrote:
I'm running a slightly modified version of a dragon v1.1. Same Mobo, proc, vid card, ram, soundcard, and tuner card.

Many thanks, I will be sure to give kernel/libmpeg2 a try.


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PostPosted: Wed Jan 24, 2007 7:02 pm 
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Joined: Fri Nov 18, 2005 9:22 am
Posts: 777
Location: spencerport, ny (USA)
It's an awesome fix - thanks Farenheight!
My xorg is about 10% now, instead of 45.


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PostPosted: Tue Feb 06, 2007 9:53 pm 
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Joined: Sat Jan 27, 2007 3:31 pm
Posts: 40
Location: Chattanooga TN
I'm having the same issue (video and sound stopping and starting every 1- 3 seconds during HDTV). I added the statement to my xorg.conf and Nvidia drivers are 1.0.7184. I cannot see the usage during Mythtv but when I have a browser open to Bloackbuster.com is can see it then and it is running up to 90% when I scroll up / down the page.
PIV 2.8Ghz 1 G ram.
Thanks


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PostPosted: Wed Feb 07, 2007 9:03 am 
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Joined: Fri Nov 18, 2005 9:22 am
Posts: 777
Location: spencerport, ny (USA)
williammanda wrote:
I cannot see the usage during Mythtv


Alt+X should open a floating X window, which you should be able to see on top of the playback. Or, hop on another PC and telnet/ssh over to the mythbox.


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PostPosted: Wed Feb 07, 2007 12:08 pm 
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Joined: Sat Mar 04, 2006 11:32 am
Posts: 23
williammanda wrote:
I'm having the same issue (video and sound stopping and starting every 1- 3 seconds during HDTV). I added the statement to my xorg.conf and Nvidia drivers are 1.0.7184. I cannot see the usage during Mythtv but when I have a browser open to Bloackbuster.com is can see it then and it is running up to 90% when I scroll up / down the page.
PIV 2.8Ghz 1 G ram.
Thanks


As I understand, this option only works in conjunction with the 9xxx drivers.


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PostPosted: Wed Feb 07, 2007 1:41 pm 
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Joined: Sat Jan 27, 2007 3:31 pm
Posts: 40
Location: Chattanooga TN
I mis-read the posts for the version (thought the version was less than 1). I will try to upgrade the drivers.
Thanks


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