[elrepo] el7 multiple nvidia cards

[Steve Cleveland]

Hi all,

I'm trying to setup a multiple display system in centos 7.2.
I'm trying to setup a workstation with two nvidia cards and four 
displays.  On el6 (running CentOS), I believe it used Xinerama to make 
it one big display.  In el7, if I enable Xinerama in the nvidia settings 
control panel, I get a sad face saying something has gone wrong.

These packages are installed:

kmod-nvidia-367.57-1.el7.elrepo.x86_64
nvidia-detect-367.44-1.el7.elrepo.x86_64
nvidia-x11-drv-32bit-367.57-1.el7.elrepo.x86_64
nvidia-x11-drv-367.57-1.el7.elrepo.x86_64
pcp-pmda-nvidia-gpu-3.10.6-2.el7.x86_64
yum-plugin-nvidia-1.0.2-1.el7.elrepo.noarch

# nvidia-detect -v
Probing for supported NVIDIA devices...
[10de:107c] NVIDIA Corporation GF119 [NVS 315]
This device requires the current 367.44 NVIDIA driver kmod-nvidia
[10de:0ff3] NVIDIA Corporation GK107GL [Quadro K420]
This device requires the current 367.44 NVIDIA driver kmod-nvidia

Using the built-in display control panel, it only sees the first card 
and two monitors.

Using the nouveau driver, I'm able to use built-in display control panel 
to drive all four displays and it works great with xinerama.

Has anyone tried to use the nvidia drivers in el7 with multiple nvidia 
cards?  Or with xinerama in general?

Another slightly unrelated issue.  Using the nvidia control panel, one 
time it added these lines to the xorg.conf:

Section "Files"
      FontPath        "/usr/share/fonts/default/Type1"
EndSection

With that there, Xorg appeared to ignore the "Files" section from 
/etc/X11/xorg.conf.d/99-nvidia.conf, breaking the ModulePath.  Is that 
the intended behavior merging xorg.conf.d files?

Thanks,
  - Steve