Re: [CentOS] CentOS-7 Screen black after boot

[Hersh]

Thanks.

I have tried the commands which you have suggested but, unfortunately they
did not work for me. I just reinstalled the server.

Regards
Hersh

On 7 July 2016 at 10:31, Venkata Balaji N  wrote:

> On Thu, Jul 7, 2016 at 2:00 PM, Hersh  wrote:
>
> > Hi Venkata,
> >
> > Can you please let me know the steps which you have followed for
> > re-installing the GNOME? I am having a similar problem on one of our
> > system.
> >
>
> To my understanding, when you install centos-7 with options ServerGUI or
> GNOME Desktop and leave the system for long time locked, you will notice
> that CentOS slips into textual interface mode and you will not be able to
> get GUI which means, you can login to the system and cannot see GUI screen.
>
> I have found the following steps on google, which helped me get through
> this problem
>
> systemctl disable gdm.service
> systemctl enable lightdm.service
> systemctl set-default graphical.target
>
> First command was successful, second one error'd out. Not sure what to do,
> i reverted back the first command and executed the third command and
> rebooted. All worked fine !
>
> Below is the log -
>
> [root@buildhost ~]# systemctl disable gdm.service
> Removed symlink /etc/systemd/system/display-manager.service.
>
> [root@buildhost ~]# systemctl enable lightdm.service
> Failed to execute operation: Access denied
>
> [root@buildhost ~]# systemctl disable gdm.service
>
> [root@buildhost ~]# systemctl enable gdm.service
> Created symlink from /etc/systemd/system/display-manager.service to
> /usr/lib/systemd/system/gdm.service.
>
> [root@buildhost ~]# systemctl set-default graphical.target
> Removed symlink /etc/systemd/system/default.target.
>
> I think, the last command made sense to me.
>
> Regards,
> VB
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Re: [CentOS] CentOS-7 Screen black after boot

[Venkata Balaji N]

On Thu, Jul 7, 2016 at 2:00 PM, Hersh  wrote:

> Hi Venkata,
>
> Can you please let me know the steps which you have followed for
> re-installing the GNOME? I am having a similar problem on one of our
> system.
>

To my understanding, when you install centos-7 with options ServerGUI or
GNOME Desktop and leave the system for long time locked, you will notice
that CentOS slips into textual interface mode and you will not be able to
get GUI which means, you can login to the system and cannot see GUI screen.

I have found the following steps on google, which helped me get through
this problem

systemctl disable gdm.service
systemctl enable lightdm.service
systemctl set-default graphical.target

First command was successful, second one error'd out. Not sure what to do,
i reverted back the first command and executed the third command and
rebooted. All worked fine !

Below is the log -

[root@buildhost ~]# systemctl disable gdm.service
Removed symlink /etc/systemd/system/display-manager.service.

[root@buildhost ~]# systemctl enable lightdm.service
Failed to execute operation: Access denied

[root@buildhost ~]# systemctl disable gdm.service

[root@buildhost ~]# systemctl enable gdm.service
Created symlink from /etc/systemd/system/display-manager.service to
/usr/lib/systemd/system/gdm.service.

[root@buildhost ~]# systemctl set-default graphical.target
Removed symlink /etc/systemd/system/default.target.

I think, the last command made sense to me.

Regards,
VB
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Re: [CentOS] CentOS-7 Screen black after boot

[Hersh]

Hi Venkata,

Can you please let me know the steps which you have followed for
re-installing the GNOME? I am having a similar problem on one of our
system.

Regards
Hersh

On 7 July 2016 at 06:26, Venkata Balaji N  wrote:

> On Thu, Jul 7, 2016 at 10:31 AM, Frank Cox 
> 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@buildhost ~]# systemctl set-default graphical.target
>
> Regards,
> VB
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Re: [CentOS] CentOS-7 Screen black after boot

[Venkata Balaji N]

On Thu, Jul 7, 2016 at 10:31 AM, Frank Cox 
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@buildhost ~]# systemctl set-default graphical.target

Regards,
VB
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Re: [CentOS] CentOS-7 Screen black after boot

[Frank Cox]

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
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Re: [CentOS] CentOS-7 Screen black after boot

[Venkata Balaji N]

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  wrote:

>
>
> On Thu, Jun 30, 2016 at 11:41 AM, Earl A Ramirez 
> wrote:
>
>> On 30 Jun 2016 09:34, "Venkata Balaji N"  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@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
>
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Re: [CentOS] CentOS-7 Screen black after boot

[Venkata Balaji N]

On Thu, Jun 30, 2016 at 11:41 AM, Earl A Ramirez 
wrote:

> On 30 Jun 2016 09:34, "Venkata Balaji N"  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@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
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Re: [CentOS] CentOS-7 Screen black after boot

[Earl A Ramirez]

On 30 Jun 2016 09:34, "Venkata Balaji N"  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@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?
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[CentOS] CentOS-7 Screen black after boot

[Venkata Balaji N]

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
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