4k video fails after update

[Steve Underwood]

On 10/20/2014 10:17 PM, D. Hugh Redelmeier wrote:
> | From: D. Hugh Redelmeier <hugh at mimosa.com>
>
> | I have a Seiki "4k" monitor that I'm using on my Fedora 20 system.  I'm
> | using the nvidia proprietary driver with a Geforce GTX 650 video card.  It
> | has been working well for a while.
>
> | After updates from the last week or so, when I boot, I no longer see
> | anything on the screen.
>
> Now it works.  I have no idea why.  Since I wrote the previous
> message, the monitor shut down due to inactivity.  When I turned it on
> again, it worked -- the desktop display is visible as it should be.
For the last few days sometimes my FC20 boots to a black screen. I use a 
Samsung 4k TV and the internal GPU of a Haswell processor. If I get a 
black screen a reboot usually brings things back to normal. I haven't 
noticed a pattern to this behaviour.

Steve