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My XBMC installation is not using the VDPAU acceleration despite of the option being selected in the settings menu.

This is what I have done so far:
1. Installed XBMC from XBMCLive Dharma beta 3 to my pc (Intel Core2 E4600 - nVidia 8600GT 256MB - 1GB RAM)

2. Installed the latest NVIDIA drivers (260.19.12) as described in this post:

Login - xbmc
password - xbmc or whatever you used at install

sudo apt-get update

sudo apt-get install wget
sudo apt-get install build-essential linux-headers-`uname -r`

download the NVIDIA driver

wget ftp://download.nvidia.com/XFree86/Linux-x86/260.19.12/NVIDIA-Linux-x86-260.19.12.run

sudo telinit 1

cd /home/xbmc

sudo sh NVIDIA-Linux-x86-260.19.12.run (say no to the first question then yes to the rest)

3. Turn ON the "Use VDPAU acceleration" setting

But I can see that the movie is not smooth.
Infact when I press 'o' during a playback of a BluRay backup (H264 1080p24): movie I see:
dc: ff-h264
CPU 0: 80% CPU 1: 84%

It looks like it's not using the VDPAU acceleration.
What I am supposed to do to make this working?
Maybe the installation instructions in step 2 were wrong somewhere?
Should I ever done the step 2, or the NVIDIA drivers were already installed?

Just to make a test , I have setup on the same PC a Windows installation with XBMC.
And when I press 'o' during the same bluray movie, I see:
dc: ff-h264-dxva2
CPU average: 20%

So this means that the card supports hardware acceleration but for some reason the LINUX version is not picking it up.

Any suggestion?
sudo apt-get install libvdpau1

If that don't make effects try

sudo nvidia-xconfig
That's a good tip...
I will try right now and get back.
Checking xbmc.log is usually a good thing to do Smile
Unfortunately it did not seem to work:

scalpel Wrote:Try:
sudo apt-get install libvdpau1

It's already installed.

scalpel Wrote:sudo nvidia-xconfig

Using X Configuration file: "/etc/X11/xorg.conf".

WARNING: No Layout specified, constructing implicid layout section using screen "screen",

WARNING: Unable to find CorePoint in X configuration; attempting to add new CorePointer section

WARNING: The CorePoint device was not specified explicitly in the layout; using the first mouse device.

WARNING: Unable to find CoreKeyboard in X configuration; attempting to add new CoreKeyboard

WARNING: the CoreKeyboard device was not specified explicitly in the layout; using the first keyboard device.

Backed up file '/etc/X11/xorg.conf' as '/etc/X11/xorg.conf.backup'
New X configuration file written to  '/etc/X11/xorg.conf'

Is there anything wrong with my installation?

tslayer Wrote:Checking xbmc.log is usually a good thing to do Smile

You are right. Where can I find it? [FOUND: will post shortly]
SOLVED: reinstalled everything from scratch, without upgrading manually the drivers and everything works out of the box.

Thanks to everybody for helping