Thanks for that idea. I tried changing from screen blanking to a screen
saver but it didn't seem to help. I then tried just restarting X with
ctrl-alt-backspace when it had happened, with no help - I still got no
display on virtual terminal under F1, and F2 etc had a text terminal
until I rebooted.
As this has followed me across computers with the shared home dir, I
think it must be something in my account - I just really can't think of
what user settings would affect X in this way...
James Pulver
CLASSE Computer Group
Cornell University
On 09/13/2016 10:48 AM, Howard, Chris wrote:
Sounds like a problem with the screen saver
Instead of a reboot, you could restart X with a control-alt-backspace
I think.
But I would investigate changing your screen saver, either
turning it off or making it do something graphical and not
just black out.
-----Original Message-----
From: owner-scientific-linux-us...@listserv.fnal.gov
[mailto:owner-scientific-linux-us...@listserv.fnal.gov] On Behalf Of James M.
Pulver
Sent: Tuesday, September 13, 2016 8:42 AM
To: scientific-linux-users@fnal.gov
Subject: Re: X stopping displaying on SL7.2
I have now determined that it seems specific to my turning off the
monitor. If I leave it on even overnight, X keeps working as expected.
The problem is that the monitor is not turned off - so the backlight is
going on a black screen all the time.
James Pulver
CLASSE Computer Group
Cornell University
On 09/12/2016 09:27 AM, James M. Pulver wrote:
Cross posted from serverfault:
I'm having the weirdest issue. We use SL7.2 and have a network home
directory and AD + SSSD for auth. This means I can go to different
computers and get a consistent home dir as well as UID/GID etc. I have a
physical KVM to set up computers more easily.
I started having an issue where my workstation would stop displaying X
to my monitor. The monitor will say "No Signal" It would work fine until
I switched away via the KVM to another computer, when I switched back X
would not display. I could connect via Bomgar and see my X session, it
was fine. I could ctrl-alt-F3 and the virtual terminal would display,
but the only way to get X back was to reboot.
I thought it might be the KVM, so I connected the monitor via DVI
directly to the workstation. No change.
I thought it was an issue with the hardware or the OS install, so I set
up a brand new Lenovo P510 with a new SL7.2 install. Now it will loose X
if I just don't use it for a while (I think it's the screen locking?).
I thought it might be the monitor - maybe it's old and loosing signal,
or the new Display port to DVI adapter can be funky, so I installed a
brand new BENQ GW2765, connected directly via Display Port to the nVidia
card (this card only has Display Port connectors - 4x). No change.
However, this last time Bomgar could not show the X session...
So now I'm thinking - it HAS to be software, and it has to be something
in my configuration. But I don't really even know where to start looking
- /var/log/messages and /var/log/Xorg.0.log don't show anything that's
obvious to me.
How can I fix X not coming back?
