[Solved] Lightdm background Problem

I installed a new ISO of
Linux calculate 3.12.9-calculate #1 SMP PREEMPT Mon Feb 3 09:44:30 UTC 2014 x86_64 Intel® Core™ i5 CPU M 520 @ 2.40GHz GenuineIntel GNU/Linux

On my THinkpad T410 resolution 1440x900 8gb mem

Active lines in my lightdm-gtk-greeter.conf look like so

font-name=Droid Sans
As you can see I have the standard issued Wallpaper which I like…
This will appear on a logout.
BUT… on a New Boot an odd wallpaper which I can not find on the system appears.
Probably some xdm default wallpaper. Appears as black & white diagonal chess board type image.
The wallpaper listed in the light-gtk-greeter.conf /usr/share/wallpapers/ and many more are available.
However do not appear on a New boot.

What is the issue. I have traced scripts but can not seem to find a reference to the odd wallpaper.

More experimentation…
The problem above only occurs after a shutdown but not after a restart

OK, Maybe this will be of help to anyone looking at the thread.
Here is section of the Grub2 that actually boots Calculate and displays the lightdm logon screen.
Reference to the Calculate Theme is perhaps a clue. I don’t know other then the /usr/share/wallpapers where to find other references
BTW that is a single line from the word linux to the word quiet

@ _echo ‘Loading Linux 3.12.9-x86_64-CLDX …’
linux /boot/vmlinuz-3.12.9-x86_64-CLDX root=UUID=da710592-317c-45b7-81cd-91c005bdbdb3 ro video=uvesafb:ywrap,1440x900-32,mtrr:3,splash=silent,theme:calculate elevator=cfq doscsi calculate=video:nouveau console=tty1 udev quiet
echo ‘Loading initial ramdisk …’
initrd /boot/initramfs-3.12.9-x86_64-CLDX_ @

Well, I got the logo part solved. As I said, instead of the Calculate Logo on the Logon/Password Widget there is a large Yellow Smiley Face. I found this in My home dir /home/sqlpython. It is a hidden file named .face .
So, I moved it to another dir and lightdm could not find it and replaced it with Calculate Logo that I refrenced earlier in /etc/lightdm/light.conf

Now if I can find the location of that Ugly Black & White Wallpaper that the light-gtk-greeter has forced upon me. Then I can replace it.
Any Ideas ?

New Development…
When on the lightdm logon screen, If I choose another user like Guest, the wallpaper changes to the choosen wallpaper listed in /etc/lightdm/lightdm-gtk-greeter.conf
Why and How come not initially ?

Any errors in Xorg log files?

Here is the end of /var/log/Xorg.1.log and the error lines (EE)

Seems to be a refusal to switch to 1440x900 and also notice the line UnloadModule: "nouveau
Why would the nouveau module be unloaded ?

*[ 996.185] (**) using VT number 7

[ 996.185] (WW) xf86OpenConsole: setpgid failed: Operation not permitted
[ 996.185] (II) [drm] nouveau interface version: 1.1.1
[ 996.185] (II) Loading sub module “dri2”
[ 996.185] (II) LoadModule: “dri2”
[ 996.185] (II) Module “dri2” already built-in
[ 996.185] (EE) NOUVEAU (0): [drm] failed to set drm interface version.
[ 996.186] (EE) NOUVEAU (0): [drm] error opening the drm
[ 996.186] (EE) NOUVEAU (0): 835:
[ 996.186] (II) UnloadModule: “nouveau”
[ 996.186] (EE) Screen(s) found, but none have a usable configuration.
[ 996.186] (EE)
Fatal server error:
[ 996.186] (EE) no screens found(EE)
[ 996.186] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 996.186] (EE) Please also check the log file at “/var/log/Xorg.1.log” for additional information.
[ 996.186] (EE)
[ 996.502] (EE) Server terminated with error (1). Closing log file.*

Have you tried using the driver <<x11-drivers/nvidia-drivers>>?

I have given that much consideration.
However by reading the Gentoo Wiki

I see that as the Calculate kernel updates I could lose video connection due to the older Nvidia driver which I would have to wait weeks for an update. Not an update friendly situation and requires more system maintainance .
Somewhat of an annoyance every time the kernel changes and I must temporarily use nouveau.
I might as well only use nouveau and avoid the update annoyances.

So is there a better choice?

Meanwhile, lightdm has replaced the Calculate logo once again with the Smiley face. I see that .face png is back in my home directory. Although I have deleted it twice … grrrrrr !

Ok, Enough butting heads with lightdm.
I solved the problem by installing a New copy of CLD.
So, my Xfce with lightdm has been replaced by KDE with KDM

I haven’t run KDE in a few Years. I first installed it at version .99.
Downloaded it to 5 750mb diskettes in 1999. Yeah the CLD is a muted subdued KDE.
All the power but not showing on the surface.

Case solved, lightdm is buggy with nvidia.