Near 100% CPU in fullscreen

slight · 2008-04-03 18:23

Tried Warsow and it does use 100% CPU, but it does on my other box with a 6200 in it too.

**topfs2** · 2008-04-03 19:33

tslayer Wrote:Topfs2, I thought it was vsync too, but I'm pretty sure I have it enabled as well. I also have an 8600GT.

FYI, it uses one core at 100%. Not both.

topfs2 Wrote:Sounds like vsync issue.

I have 8800gts and 5600fx, never 100% nor the issue slight is having

But slight which programs have you tried that are more advanced and uses shaders?
Warsow, Nexquiz, Saurbraten or ET:QW?
The 3 first are free and should be available in repo and might prove if it's driver related? Still games tend too use up all cpu

Thx

I must excuse myself, I have the problem aswell Smile

I've too double checked and the applet tells me I have vsync on and such but I still believe it might be related somehow as video does bring the percentage down, anyone sure vsync work as intended on 8xxx series?

100% on one core applies seeing as XBMC only uses one thread for the rendering, and without vsync it prob. goes wild Smile

might be applet that cannot do vsync well, anyone tried it with xorg.conf?

BLKMGK · 2008-04-03 22:54

I appear to have 100% on both cores using an SVN from last night. This did NOT use to be a problem and in fact was fixed at one time Sad

MrDohnuts · 2008-05-02 12:03

Has anyone got any further with this issue?

I've tried all the suggested methods above, I'm certain that Vsync is enabled everywhere it can be.

Could someone with an 8600GT or similar that DOESN'T have the problem post there xorg.conf - I'd really like to compare.

Thanks

drewjacks0n · 2008-05-13 01:38

I am experiencing the same problem with a 8400GS card.

It only happens in fullscreen mode, I am using the build from 05/11/08 and the latest nvidia drivers - 169.12.

It is not a huge deal as videos work fine and use less cpu (on average) than XBMC does when idling.

slight · 2008-05-18 13:27

I think I've finally worked out why this was happening, for me at least.

Basically the vsync option in XBMC wasn't working (haven't tried recent builds), and although I thought I had the nVidia driver syncing, it wasn't.

So I have a little 'script' to launch XBMC like so:

Code:

#!/bin/bash

export set __GL_SYNC_DISPLAY_DEVICE=DFP-0

export set __GL_SYNC_TO_VBLANK=1

export set XBMC_HOME="/home/tolan/bin/XBMC/BUILD/"; 

cd /home/tolan/bin/XBMC/BUILD/; 

./XboxMediaCenter -fs -q &

You only need the "export set __GL_SYNC_DISPLAY_DEVICE=DFP-0" part if you're running multiple displays. Replace "DFP-0" with the X device that you actually watch on (I have a second little LCD panel on my media centre pc so I don't have to turn my projector on just to change music or whatever)

drewjacks0n · 2008-05-18 22:18

Now running XBMC with __GL_SYNC_TO_VBLANK=1.

One core is still at 100% CPU when xbmc is in fullscreen Sad

yellowman · 2008-05-19 13:08

Hi,

One thing that worked for me, Open Nvidia x server settings, go to Open gl settings, uncheck the box called "Allow flipping"(or similar).

No idea what it means, or if it´s bad... But it could be worth a try.

zAo_OSX · 2008-05-19 23:30

I don't have 100% CPU in Fullscreen, 'only' ~5%.

Machine:
AMD 3200+
Nvidia 6200 AGP
2GB

Ubuntu 8.04 Server
Xorg
XBMC from PPA Repro

I start Xorg (with nvidia module) and XBMC with a startscript. I did not use any WM or DM; maybe thats the problem?

drewjacks0n · 2008-05-21 07:26

yellowman Wrote:One thing that worked for me, Open Nvidia x server settings, go to Open gl settings, uncheck the box called "Allow flipping"(or similar).

This worked like a charm. I have edited my .nvidia-settings-rc file to read:

Code:

0/AllowFlipping=0

After some googling, it appears you can also add the following to your device section in your xorg.conf

Code:

Option "NoFlip" "1"

Thank You!

slight Junior Member Posts: 44 Joined: Mar 2008 Reputation: 0	2008-04-03 18:23 Post: #31 Tried Warsow and it does use 100% CPU, but it does on my other box with a 6200 in it too.
	find quote

BLKMGK Member+ Posts: 1,634 Joined: Jul 2006 Reputation: 3 Location: USA Virginia	2008-04-03 22:54 Post: #33 I appear to have 100% on both cores using an SVN from last night. This did NOT use to be a problem and in fact was fixed at one time Ubuntu 10.10, MCE USB receiver, ASROCK 330 (ION), DVDs fed from unRAID cataloged by DVD Profiler. HD-DVD encoding Added DiNovo Mini KBRD w/track
	find quote

MrDohnuts Junior Member Posts: 21 Joined: May 2008 Reputation: 0 Location: Colchester, UK	2008-05-02 12:03 Post: #34 Has anyone got any further with this issue? I've tried all the suggested methods above, I'm certain that Vsync is enabled everywhere it can be. Could someone with an 8600GT or similar that DOESN'T have the problem post there xorg.conf - I'd really like to compare. Thanks
	find quote

drewjacks0n Member Posts: 62 Joined: May 2008 Reputation: 0	2008-05-13 01:38 Post: #35 I am experiencing the same problem with a 8400GS card. It only happens in fullscreen mode, I am using the build from 05/11/08 and the latest nvidia drivers - 169.12. It is not a huge deal as videos work fine and use less cpu (on average) than XBMC does when idling.
	find quote

drewjacks0n Member Posts: 62 Joined: May 2008 Reputation: 0	2008-05-18 22:18 Post: #37 Now running XBMC with __GL_SYNC_TO_VBLANK=1. One core is still at 100% CPU when xbmc is in fullscreen NOW: AppleTV+CrystalHD PREVIOUS: HTPC and XBOX (both loudly running XBMC)
	find quote

zAo_OSX Junior Member Posts: 47 Joined: Jan 2008 Reputation: 0	2008-05-19 23:30 Post: #39 I don't have 100% CPU in Fullscreen, 'only' ~5%. Machine: AMD 3200+ Nvidia 6200 AGP 2GB Ubuntu 8.04 Server Xorg XBMC from PPA Repro I start Xorg (with nvidia module) and XBMC with a startscript. I did not use any WM or DM; maybe thats the problem?
	find quote