[mythtv-users] Mythbuntu 10.10 is loading the wrong nvidia driver -- I think?

[Ryan]

I have an Asus P5N7A-VM MB and I just recently "upgraded" a perfectly
working myth set up.
I cant get HDMI sound, there is no iec958 in alsamixer.

Also, I noticed this message in the front end log:
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object
file: No such file or directory
2010-11-03 21:32:28.344 VDPAU Error: Error at mythrender_vdpau.cpp:1478
(#1, Unknown)
2010-11-03 21:32:28.344 VDPAU Error: Failed to create VDPAU device.
2010-11-03 21:32:28.344 VDPAU Error: No VDPAU device
2010-11-03 21:32:28.344 Failed to create VDPAU render device.

Hua.  I know my video card supports VDPAU, thats why I bought this MB:
03:00.0 VGA compatible controller: nVidia Corporation C79 [GeForce 9300 /
nForce 730i] (rev b1)

So in the Xorg.log file I see xorg is loading the NOUVEAU driver.  It's
logs indicate it's not for the 9x series:

[    11.512] (II) NOUVEAU driver Date:   Thu Aug 5 00:40:40 2010 +0200
[    11.512] (II) NOUVEAU driver for NVIDIA chipset families :
[    11.512]    RIVA TNT    (NV04)
[    11.512]    RIVA TNT2   (NV05)
[    11.512]    GeForce 256 (NV10)
[    11.512]    GeForce 2   (NV11, NV15)
[    11.512]    GeForce 4MX (NV17, NV18)
[    11.512]    GeForce 3   (NV20)
[    11.512]    GeForce 4Ti (NV25, NV28)
[    11.512]    GeForce FX  (NV3x)
[    11.512]    GeForce 6   (NV4x)
[    11.512]    GeForce 7   (G7x)
[    11.512]    GeForce 8   (G8x)

What driver should I be using?  How do I go about changing XOrg to use a
different driver, and where is libvdpau_nvidia.so??

Am I supposed to install the proprietary driver from Nvidia?  I am under
the impression that is not the right thing to do.

Help!!

-- Ryan