[elrepo] Update to kmod-nvidia-331.20-1.el6.elrepo.x86_64 breaks 3D support

[B.J. McClure]

On 11/13/2013 05:21 PM, B.J. McClure wrote:
> My home office workstation with fully updated CentOS 6.4 and dual 
> monitors has been working well with kmod-nvidia for a few years. The 
> recent update to the subject driver broke 3D support according to the 
> error message I get when I try to reconfigure desktop effects from the 
> GUI.  Previously working desktop effects failed to work as soon as the 
> new driver loaded.
>
> [bmcclure at office2 ~]$ sudo nvidia-detect
> Probing for supported NVIDIA devices...
> [10de:1040] NVIDIA Corporation GF119 [GeForce GT 520]
> This device requires the current 331.20 NVIDIA driver kmod-nvidia
> [bmcclure at office2 ~]$ rpm -q kmod-nvidia
> kmod-nvidia-331.20-1.el6.elrepo.x86_64
>
> [bmcclure at office2 ~]$ rpm -qa | grep nvidia
> nvidia-detect-331.20-1.el6.elrepo.x86_64
> nvidia-x11-drv-331.20-1.el6.elrepo.x86_64
> kmod-nvidia-331.20-1.el6.elrepo.x86_64
>
> [bmcclure at office2 ~]$ lspci | grep VGA
> 01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce 
> GT 520] (rev a1)
>
> Is this a known bug?  If necessary, I can always downgrade to previous 
> driver or compile from source.
>
> Any hints appreciated.
>
> Cheers,
> B.J.
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>
Replying to my own post, looking at /var/log/Xorg.0.log shows glx module 
is not loading and the sim link to 
/usr/lib64/xorg/modules/extensions/nvidia/libglx.so.331-20 is broken. 
Repairing the symlink should fix it.