Hello, it's a GPU modules issue, by all means; I experienced the very same
the first time I booted into the live environment to install Fedora.
You need to find a workaround, maybe by adding the needed parameters in
your kernel boot line.
Regards.

On Sat, Mar 7, 2015 at 9:45 AM, <linuxnuts...@videotron.ca> wrote:

> Greetings,
>
> I previously posted that since a fedup to fedora 21, I intermittently boot
> up to a blank screen. I'm using akmod-nvidia-340xx, but reverting back to
> nouveau did not solve the issue. One out of every 3 boot results in the
> problem. I pressed ctrl+alt+F2 and logged in and attempted the startx
> command. The resulting error message said to check xorg.1.log.
>
> The nvidia console ( nvidia xserver settings ) clearly indicates my screen
> type ( Ancor communications Asus VH196. Would the "no screens found" be the
> possible source of my headache?
>
> This is the error log from /var/log/Xorg.1.log:
>
> [   359.396] (II) FBDEV: driver for framebuffer: fbdev
> [   359.396] (II) VESA: driver for VESA chipsets: vesa
> [   359.396] (++) using VT number 2
>
> [   359.396] (WW) Falling back to old probe method for modesetting
> [   359.396] (II) Loading sub module "fbdevhw"
> [   359.396] (II) LoadModule: "fbdevhw"
> [   359.396] (II) Loading /usr/lib64/xorg/modules/libfbdevhw.so
> [   359.397] (II) Module fbdevhw: vendor="X.Org Foundation"
> [   359.397]    compiled for 1.16.3, module version = 0.0.2
> [   359.397]    ABI class: X.Org Video Driver, version 18.0
> [   359.397] (EE) open /dev/fb0: No such file or directory
> [   359.397] (WW) Falling back to old probe method for fbdev
> [   359.397] (II) Loading sub module "fbdevhw"
> [   359.397] (II) LoadModule: "fbdevhw"
> [   359.397] (II) Loading /usr/lib64/xorg/modules/libfbdevhw.so
> [   359.397] (II) Module fbdevhw: vendor="X.Org Foundation"
> [   359.397]    compiled for 1.16.3, module version = 0.0.2
> [   359.397]    ABI class: X.Org Video Driver, version 18.0
> [   359.397] (EE) open /dev/fb0: No such file or directory
> [   359.397] vesa: Ignoring device with a bound kernel driver
> [   359.397] (WW) Falling back to old probe method for vesa
> [   359.397] (EE) Screen 0 deleted because of no matching config section.
> [   359.397] (II) UnloadModule: "modesetting"
> [   359.397] (EE) Screen 0 deleted because of no matching config section.
> [   359.397] (II) UnloadModule: "fbdev"
> [   359.397] (II) UnloadSubModule: "fbdevhw"
> [   359.397] (EE) Screen 0 deleted because of no matching config section.
> [   359.397] (II) UnloadModule: "vesa"
> [   359.397] (EE) Device(s) detected, but none match those in the config
> file.
> [   359.397] (EE)
> Fatal server error:
> [   359.397] (EE) no screens found(EE)
> [   359.397] (EE)
> Please consult the Fedora Project support
>          at http://wiki.x.org
>  for help.
> [   359.397] (EE) Please also check the log file at "/var/log/Xorg.1.log"
> for additional information.
> [   359.397] (EE)
> [   359.398] (EE) Server terminated with error (1). Closing log file.
> --
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-- 
-Martin
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