Created attachment 108483 [details]
Xorg.0.log

This is not a useful report (yet). I'm sorry: I don't know the right terms to
use and this is a hard-to-describe situation.

Nouveau X server comes up but text sometimes doesn't: on my xdm login the
"Welcome to ..." appears, and the Login text, but entering my username the
cursor just moves right and a few (2-3) pixel-sized dots appear where letters
should.

Emacs, with this in .Xdefaults:

    Emacs.font: DejaVu Sans Mono-14

...comes up but blank: no menus, no mode bar, no "This buffer is for" in my
*scratch* buffer. Grabbing the windowmanager titlebar and dragging the window
just a pixel or two makes all text appear, until I change virtual desktops and
come back again. Then all text is gone just like the start.

xterms, using:

    *font: -misc-fixed-medium-r-normal-*-20-*-*-*-*-*-iso10646-1

...are all fine. No problems ever.

Dell M4800 
    # d ~ # lspci |grep VGA
    01:00.0 VGA compatible controller: NVIDIA Corporation GK106GLM [Quadro
K2100M] (rev a1)

    # uname -r
    3.16.6-gentoo

Xorg.0.log attached but I doubt it shows anything useful. I have no idea what
*would* be useful but I'd love to offer what I may. I am highly motivated to
use this over the proprietary nvidia driver.