Failed to open VDPAU backend libvdpau_nvidia.so

Failed to open VDPAU backend libvdpau_nvidia.so

how can i do?

First: explain what level of openSUSE you use.
Second: tell which Nvidia driver you use (did you install from the nvidia repo or not).
Third: explain when and where you get that message.
Fourth: if you still have a functioning graphics on your screen.
Fifth: all and everything you may think to be of interest to the volunteers here so that they can help you as good as possible.

We are not clairvoyant and our crystal balls have Pentecost holliday.

thank you very much.sorry i have not explain more about it.before i will call volunteers for help.
this error is say by shell when i run firefox in shell,suse 12.1(asparagus),kernel is 3.1.10-1.9-desktop,gnome 3.2.1.
My graphics card is intel G 41.

When you get an error message when you run in a shell, that is very good, because you then can post here the command and all output that you get (including the error message by copy/paste that in your post between CODE tags: http://forums.opensuse.org/english/information-new-users/advanced-how-faq-read-only/451526-posting-code-tags-guide.html That is uch more effective then “telling” that you got something when you did something because it shows all with one swoop of the mouse. For example, Ia mrunnig openSUSE 11.4 and KDE and when I runFF from the CLI, I get:

henk@boven:~> firefox
Xlib:  extension "GLX" missing on display ":0".
henk@boven:~>

A dfifferent message then you, but it is only to show you how you can very effective tell us what you do and what you get.

You also did not tell if FF then opens or not. (in my case above it does open normaly).