Fedora 21: Dark login screen during and after install

[fedora]

Hi Jim
I am running xfce4 desktop. There I see tow processes:

1330 ?        Sl     0:01 xfce4-panel --display :0.0 --sm-client-id 
2909f5012-dacf-42fc-99fa-c7000a7211d3

  1427 ?        S      0:00 /usr/lib64/xfce4/panel/wrapper 
/usr/lib64/xfce4/panel/plugins/libsystray.so 6 25165855 systray 
Notification Area Area where notification icons appear

which apparently handle the panels, because, when I stop them, the 
panels are gone.
You may have something similar in your system. So in order to be armed 
when occasionally the panels desappear again, check to see which are the 
processes you will have to restart.

suomi

On 01/05/2015 07:55 PM, Jim Lewis wrote:
>
> Hello all,
>
>    This is pretty strange so I thought I better mention it. Here's the
> scenario:
>
> - Have already installed Fedora 21 Mate-Compiz Spin on a Lenovo T500
> laptop that I bought from IBM in 2009. Thanks to the help from this forum
> it seems to be running well.
>
> - Decided to install it on one of my newer T500s. It is a bit different as
> it has a fingerprint reader and built in camera. Using the same DVD as
> before, right at the first installation panel, something happens to the
> screen. At first it looks just fine, then it blacks out for about a second
> then comes back on but very dark. There is a prompt right in the center of
> the screen asking for a password. WTF? I don't remember this from the
> install on the other system. I press Enter a bunch of times, the screen
> goes back to normal, and proceeds with the next steps.
>
> - Every goes fine until the reboot. That same dark screen comes up. It
> will not accept my password (for guest1) until I leave it empty. The
> screen comes up with the Computer, Home, and Trash icons but no panels. I
> can find no way to add them.
>
> - Thinking that this is hopeless I decide to run a full update (yum -y
> update). It completes and I shutdown cold and then reboot. Damn thing
> comes up just fine, with panels too. It's been running fine for about 24
> hours now.
>
> -  I looked at dmesg on both systems. I see this on the newer one:
>
> [  2.885818] VGA switcheroo: detected switching method
> \_SB_.PCI0.VID_.ATPX handle
>
>   I also checked lspci on both but don't see anything relevant.
>
>
>      I am concerned that the dark screen will return someday and my panels
> will be lost again. If anyone has even a clue as to what is going on I
> sure would like to hear it. At this point I suspect Fedora 21 doesn't
> like something in the BIOS on this "newer" machine. Note that Fedora
> 20 installed with no issues and runs great on it.
>
>
> Jim Lewis
>
>
>
>
>