[CentOS] netbook screen suddenly goes black

[Fred Smith]

On Mon, Jun 20, 2016 at 07:02:35AM +0200, anax wrote:
> Try with CTRL-ALT-F2 (go to the console) and CTRL-ALT-F1 (go back to
> the X-Window). This may help...
> 
> suomi

oh, sorry, I did try that, but failed to mention it. No, it makes
no visible difference at all.

> 
> On 06/20/2016 03:10 AM, Fred Smith wrote:
> >Hi all!
> >
> >I'm running an up to date Centos-7 on my Acer Aspire One netbook. have
> >been for, well, ever since C7 was released.
> >
> >Just had an event today that also happened 2 or 3 times with earlier
> >systems installed, but I never pursued it.
> >
> >What happens is that suddenly while working away on the desktop the
> >display suddenly goes black... not black as in turned off, I can see
> >that the backlight is still on, but no image is displayed.
> >
> >Nothing I can do fixes it except a reboot. I've tried CTRL-ALT-BKSP,
> >CTRL-ALT-DEL, alt+printscreen+r+e+i+s+u+b. none of them do anything
> >noticeable.
> >
> >I've been looking at system logs and don't find anything that gives
> >me a clue what is going wrong when that happens.
> >
> >neither dmesg, /var/log/Xorg*, nor /var/log/messages contins much. I've
> >tried digging thru "man journalctl" and ultimately reading thru the
> >output of journalctl with no arguments.
> >
> >Can anyone of you provide further hints on what I should be looking
> >for or at?
> >
> >thanks!
> >
> >Fred
> >
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-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us -----------------------------
   "For the word of God is living and active. Sharper than any double-edged 
   sword, it penetrates even to dividing soul and spirit, joints and marrow; 
              it judges the thoughts and attitudes of the heart."  
---------------------------- Hebrews 4:12 (niv) ------------------------------