[gnome-flashback] Gnome FB Meta on F22 fails to start locally

[Michael DePaulo <mikedep333 gmail com>]

Hi Gnome Flashback devs,

As previously mentioned, Yaakov Selkowitz and I are working on
packaging GNOME Flashback for Fedora.
https://copr.fedoraproject.org/coprs/yselkowitz/gnome-flashback/

http://pastebin.com/AKA2YuDu

Anyway, I installed Fedora 22 (GNOME 3.16) on my laptop and GNOME
Flashback Metacity 3.16.x is failing to start locally via GDM.
Surprisingly, it successfully starts remotely via TigerVNC on the
laptop and on an Amazon EC2 instance. I can also start regular GNOME,
or GNOME Classic, on the laptop locally.

Both outputs below are from `journalctl --user`. I am calling
gnome-flashback-metacity with --debug.

Output from a failed local session:
http://pastebin.com/uF162cR7

Output from a successful remote (TigerVNC) session on the same laptop:
http://pastebin.com/1ixSQt40

It seems that the gnome-flashback executable itself is failing. I can
even see gnome-panel for a split second after I dismiss the fail
whale.

In my ~/.vnc/.xstartup script, I have these 2 lines, which may be significant:
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS

Also,

GDM is reading from the xsession file, which contains this line:
DesktopNames=GNOME-Flashback;GNOME;

Whereas for TigerVNC, I have this line in ~/.Xclients
export XDG_CURRENT_DESKTOP=GNOME-Flashback;GNOME;

So those 2 lines should be equivalent.

And here is the list of packages and their versions on the laptop:
http://pastebin.com/AKA2YuDu

-Mike