Screen power saves and goes off and desktop is lost on power up

ianseeks bingmybong at
Fri Mar 3 09:43:56 GMT 2017

On Friday, 3 March 2017 02:33:00 GMT Duncan wrote:
> ianseeks posted on Thu, 02 Mar 2017 15:41:53 +0000 as excerpted:
> > On Thursday, 2 March 2017 09:34:13 GMT René J.V. Bertin wrote:
> >> On Thursday March 2 2017 09:20:25 ianseeks wrote:
> >> >Just done a zypper dup and a new kernel and kdm was installed, i'll
> >> >see how it works now.
> >> 
> >> I'd be curious to know what was changed in KDM and why.
> > 
> > Nothing changed according to changelog in Yast for KDM.  And the problem
> > still exists..
> FWIW...
> I had that problem this summer, but I was busy relocating and temporarily
> in a hotel at the time, and didn't have a chance to really trace it down
> as I wanted, and it seems to work properly again now, tho since I didn't
> have time to actually trace it down and I changed TV-as-monitors since
> then, it could just as easily be a different TV-as-monitor that works
> slightly different over idle-power-down as a change in code
> I was and am on kde-frameworks and plasma git, so there's a fair chance
> you're running the released code now that was giving me that problem last
> summer.
> After realizing that if I left firefox playing youtube, the problem
> wouldn't occur, and deciding that must be due to firefox inhibiting auto-
> locking (but /not/ screen blanking and power-down), I did investigate a
> bit...
> I ended up changing the xorg and plasma options so the screen didn't
> blank and the monitors didn't turn off (turning off the screen-blanking
> and screen-locking in plasma, and setting all dpms timeouts to 0/disabled
> in xorg.conf.d, simply setting dpms off didn't do it, plasma apparently
> turned it back on), and then used manual screen lock and/or poweroff when
> I wanted it, as a workaround.
> Again, note that /manual/ lock and monitor power-downs didn't trigger the
> issue, only /automatic/ ones.  And automatic screen-blanking and
> powerdown, without the auto-lock, seemed not to trigger it either.  But
> manual locking didn't trigger it, so it wasn't just the locking.  Which
> was why I was a bit frustrated not to have the time to investigate it
> properly, and figure out exactly what was going on.
> That was successful at working around the problem, but it obviously
> wasn't a fix.
> And when I relocated out of the hotel to my new house, I damaged one of
> the big-screen TVs I'd been using as a monitor, so had only one for
> awhile.  Then I got another, my first 4K (3840x2160, 65-inch =:^), and
> reconfigured to use both it and the remaining 48-inch full-HD
> (1920x1080), and I've not had the problem since.  But I'm not sure
> whether it was the way the one I damaged handled auto-power-down compared
> to the new 4K and the other older one (by a different manufacturer), or a
> plasma or frameworks fix during that time, that eliminated the problem.
> <shrug>
> Anyway, you can try the same workaround for now, disabling the automatic
> screen locking and/or automatic monitor blanking and powerdown, doing
> manual if you need to, and hopefully it'll work for you for the time
> being as well.  And hopefully it /was/ a code fix, and at some point in
> the future, a plasma or frameworks update will fix the problem for you as
> well.
Thanks for the explanation.  I don;t have any power savings or screen locking 
set on the system.  I've not found a way via the menus on the ASUS monitor to 
stop it powering itself down after a time period.  I don't know enough how to 
try and stop it unless there is a way to have something running in background 
to simulate screen activity to fool it.

Qt: 5.7.1
KDE Frameworks: 5.30.0
KDE Plasma: 5.9.2
kwin 5.9.2
kmail2 5.4.2
akonadiserver 5.4.2
Kernel:  4.10.1-1-default
Nouveau:  1.0.13_2.2

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