CentOS - Jul 2016 - CentOS-7 Screen black after boot

Hello,

I have the same problem again today with CentOS-7.

I re-installed with GNOME Desktop and also configured two VMs in it, all
was working fine and i left the system locked overnight. When i tried to
unlock the next day morning, screen only shows up black. Again, i cannot
see the GUI. I can login to the system though.

Any help would be appreciated here.

Thanks,
VB

On Thu, Jun 30, 2016 at 3:03 PM, Venkata Balaji N <nag1010 at gmail.com>
wrote:
>
>
> On Thu, Jun 30, 2016 at 11:41 AM, Earl A Ramirez <earlaramirez at
gmail.com>
> wrote:
>
>> On 30 Jun 2016 09:34, "Venkata Balaji N" <nag1010 at
gmail.com> wrote:
>> >
>> > Hello Community,
>> >
>> > This is my first ever email to CentOS community. Firstly, CentOS
is a
>> great
>> > open-source operating system. I have been using it for years and
>> > recommending the same for production use to our customers.
>> >
>> > I have installed CentOS-7 operating system couple of days ago and
>> > everything was working fine. Yesterday, the screen got struck and
the
>> whole
>> > system was unresponsive, after a long wait, i have restarted the
system.
>> > Since, then, i can only see the black screen and GUI is not coming
up.
>> >
>> > I can remotely login to the system from Putty and can operate
without
>> any
>> > issues, the only issue is that GUI is not coming up.
>> >
>> > I have installed CentOS-7 server-GUI. Any help would be
appreciated
>> here.
>> >
>> > Regards,
>> > Venkata B N
>> > _______________________________________________
>> > CentOS mailing list
>> > CentOS at centos.org
>> > https://lists.centos.org/mailman/listinfo/centos
>>
>> Are you seeing the same behaviour if you choose the diagnostic kernel
>> which
>> has very basic display support? What types or graphic card are you
using?
>>
>
> Sorry, i am not sure what graphic card, i am using. But, all i could say
> is that, it was working absolutely fine and all-of-a-sudden displaying a
> blank screen.
>
> If this was the problem right from when i installed the software, that is
> understandable. Not sure, why it worked before and not after.
>
> By googling, i found out that it could be a problem with configuration of
> some files in /etc/X11/ location ??
>
> Below are the messages from /var/log/Xorg.0.log file, does these mean
> anything ?
>
>  753 [    27.979] (II) No input driver specified, ignoring this device.
>     754 [    27.979] (II) This device may have been added with another
> device file.
>     755 [    27.979] (II) config/udev: Adding input device HDA Intel PCH
> Line Out CLFE (/dev/input/event16)
>     756 [    27.979] (II) No input driver specified, ignoring this device.
>     757 [    27.979] (II) This device may have been added with another
> device file.
>     758 [    27.979] (II) config/udev: Adding input device HDA Intel PCH
> Line Out Side (/dev/input/event17)
>     759 [    27.979] (II) No input driver specified, ignoring this device.
>     760 [    27.979] (II) This device may have been added with another
> device file.
>     761 [    27.979] (II) config/udev: Adding input device PC Speaker
> (/dev/input/event6)
>     762 [    27.979] (II) No input driver specified, ignoring this device.
>     763 [    27.979] (II) This device may have been added with another
> device file.
>     764 [    27.983] reporting 6 9 18 141
>     765 [    28.132] reporting 6 9 18 141
>     766 [    28.183] reporting 6 9 18 141
>
>
>
> Regards,
> Venkata B N
>

On Thu, 7 Jul 2016 10:16:23 +1000
Venkata Balaji N wrote:
> i left the system locked overnight. 
What are you using to lock the screen?  Some of the screensavers can be bad news
on certain video cards (as I've learned the hard way) and can cause just
exactly that to happen.  In that case, the screensaver has locked up your video
card.

If this is the case, try a different screensaver.  I suggest "black screen
only" for testing purposes.

-- 
MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com

On Thu, Jul 7, 2016 at 10:31 AM, Frank Cox <theatre at
melvilletheatre.com>
wrote:
> On Thu, 7 Jul 2016 10:16:23 +1000
> Venkata Balaji N wrote:
>
> > i left the system locked overnight.
>
> What are you using to lock the screen?  Some of the screensavers can be
> bad news on certain video cards (as I've learned the hard way) and can
> cause just exactly that to happen.  In that case, the screensaver has
> locked up your video card.
>
> If this is the case, try a different screensaver.  I suggest "black
screen
> only" for testing purposes.
>
I did the following and rebooted, all worked fine. I am not sure if that is
the solution.

[root at buildhost ~]# systemctl set-default graphical.target

Regards,
VB