[F22] plasmashell & krunner crash instead of session starting; take out NV11, connect VGA to i865 port, and plasma works

[Felix Miata]

host gx270
http://fm.no-ip.com/Tmp/Linux/F/xorg.0.log-gx270-nv11-f22-1680x1050bad
Booting kernel 4.0.4 instead of 4.1.6 doesn't help.

Same machine's working plasma after removing nv11:
http://fm.no-ip.com/Tmp/Linux/F/xorg.0.log-gx270-i865G-f22-1680x1050OK
http://fm.no-ip.com/Tmp/Linux/F/xorg.0.log-gx270-i865G-f22-1440x900OK

I don't see an existing Fedora bug describing this. Would this be a KDE bug?
Nouveau driver bug? QT bug? Missing mesa or drm or dri package?

Same machine's F23's Plasma works normally with the NV11 and nouveau.
http://fm.no-ip.com/Tmp/Linux/F/xorg.0.log-gx270-nv11-f23-1680x1050OK

Partial list of installed F22 packages:
libdrm-2.4.61-3.fc22.i686
mesa-dri-drivers-10.6.3-1.20150729.fc22.i686
mesa-filesystem-10.6.3-1.20150729.fc22.i686
mesa-libEGL-10.6.3-1.20150729.fc22.i686
mesa-libgbm-10.6.3-1.20150729.fc22.i686
mesa-libGL-10.6.3-1.20150729.fc22.i686
mesa-libglapi-10.6.3-1.20150729.fc22.i686
mesa-libGLES-10.6.3-1.20150729.fc22.i686
mesa-libGLU-9.0.0-7.fc22.i686
mesa-libwayland-egl-10.6.3-1.20150729.fc22.i686
xorg-x11-drv-intel-2.99.917-15.20150729.fc22.i686
xorg-x11-drv-nouveau-1.0.11-2.fc22.i686
xorg-x11-server-Xorg-1.17.2-2.fc22.i686
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 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/