I'm sorry to say this, but the bug is still there, it comes at goes at random
between reboots.

Now I am running:
kernel 3.15.0
xorg-xf86-video-nouveau 1.0.11

And mplayer -vo xv was working fine a minute ago.  Then I rebooted the computer
and now the video plays (can hear audio), but a black screen again.

I tested again several times after restarting X, and still get a black window.
Unfortunately I can't test rmmod nouveau, because I built it in the kernel.

I see this in my Xorg log:

bash$ egrep 'WW|EE' /var/log/Xorg.0.log.old 
[  1057.575] Current Operating System: Linux hostname 3.15.0 #8 SMP PREEMPT Thu
Nov 20 10:00:10 JST 2014 x86_64
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[  1057.576] (WW) The directory "/usr/share/fonts/X11/OTF/" does not exist.
[  1057.577] (EE) systemd-logind: failed to get session: The name
org.freedesktop.login1 was not provided by any .service files
[  1057.746] (EE) NOUVEAU(0): [COPY] failed to allocate class.
[  1117.476] (EE) Server terminated successfully (0). Closing log file.

What	Removed	Added
Status	RESOLVED	REOPENED
Resolution	FIXED	---