[mythtv-users] Mythtv screensaver behaviour

Wed Dec 30 15:45:03 UTC 2015

On Wed, Dec 30, 2015 at 7:03 AM, Lawrence Rust <lvr at softsystem.co.uk> wrote:

> On Wed, 2015-12-30 at 12:02 +0000, Another Sillyname wrote:
> > On 30 December 2015 at 04:20, HP-mini <blm-ubunet at slingshot.co.nz>
> wrote:
> > > On Sun, 2015-12-27 at 09:47 +0000, Lawrence Rust wrote:
> > >> On Sun, 2015-12-27 at 13:30 +1300, HP-mini wrote:
> > >> > On Sat, 2015-12-26 at 17:49 +0100, Jonatan Lindblad wrote:
> > >
> > > <snip>
> > >> >
> > >> > That still might not be enough.. I have qtdbus enabled in master
> build
> > >> > but logs show "ScreenSaverDBus: Could not connect to dbus: " etc
> and so
> > >> > mate desktop screensaver does not inhibit during playback. Could
> this be
> > >> > dbus namespace problem?
> > >> >
> > >> > The xscreensaver works correctly.
> > >>
> > >> I also note that on my Ubuntu 12.04 LTS based BE/FE the recent patches
> > >> to fixes/0.27 to use the DBus based screensaver inhibit have no effect
> > >> although the system suspend inhibit does work.  E.g.:
> > >>
> > >> 2015-12-27 09:24:56.479151 W  ScreenSaverDBus: Could not connect to
> dbus: The name org.freedesktop.ScreenSaver was not provided by any .service
> files
> > >> 2015-12-27 09:24:56.479690 W  ScreenSaverDBus: Could not connect to
> dbus: The name org.freedesktop.PowerManagement.Inhibit was not provided by
> any .service files
> > >> 2015-12-27 09:24:56.480211 W  ScreenSaverDBus: Could not connect to
> dbus: The name org.mate.SessionManager was not provided by any .service
> files
> > >> 2015-12-27 09:24:56.482108 I  ScreenSaverDBus: Created for DBus
> service: org.gnome.SessionManager
> > >>
> > >> I ran foul of similar problems a couple of years ago after this patch
> > >> was added to 0.27: "5e13d41 Remove support for GNOME screensaver".
> > >>
> > >> I have a combined BE/FE that runs 0.27 on Ubuntu 12.04 LTS and has
> > >> xscreensaver installed to display a slideshow while idle.  Prior to
> that
> > >> patch I was using a wrapper around the gnome-screensaver-command that
> > >> trapped the obsolete --poke option.  I had this
> > >> in /usr/local/bin/gnome-screensaver-command:
> > >>
> > >> #!/bin/sh
> > >> set -e
> > >>
> > >> Poke() {
> > >>     dbus-send --session --dest=org.gnome.ScreenSaver
> --type=method_call\
> > >>         /org/gnome/ScreenSaver
> org.gnome.ScreenSaver.SimulateUserActivity
> > >> }
> > >>
> > >> case "${1:-}" in
> > >>     --poke) Poke ;;
> > >>     *) /usr/bin/gnome-screensaver-command "$@" ;;
> > >> esac
> > >>
> > >> Following the removal of support for Gnome screensaver I wrote my own
> > >> patch that replaced the "gnome-screensaver-command --poke" call with a
> > >> call to "dbus-send...".  This restored the behaviour that you are
> > >> seeking.
> > >>
> > >> If you are interested, the patch is named
> > >> "0171-Screensaver-Add-DB-settings-for-the-detection-and-de.patch"
> > >> and is available in my MythTV patch archive:
> > >> http://www.softsystem.co.uk/download/mythtv/mythbuild-CURRENT.zip
> > >>
> > >> If necessary, you can configure the system command issued to disable
> the
> > >> Gnome screensaver from 'TV settings/Playback/General Playback/
> > >>
> > >> HTH
> > >>
> > >> -- Lawrence Rust
> > >>
> > > Hi Lawrence,
> > > Here mythtv fails to work with mate-screensaver (fine with
> > > xscreensaver).
> > > I should try to figure out the root cause. Your script gives some
> > > insight..
> > > I recall switching to xscreensaver when gnome-screensaver stopped
> > > working as well.
> > >
> > > I've been using your playback seek recovery patch (PTS AV jiggle) for
> > > some years, the default behaviour is very annoying especially with near
> > > instant seeking.. Thanks.
> > > Brett.
> > >
> > >
> > >
> > > _______________________________________________
> > > mythtv-users mailing list
> > > mythtv-users at mythtv.org
> > > http://lists.mythtv.org/mailman/listinfo/mythtv-users
> > > http://wiki.mythtv.org/Mailing_List_etiquette
> > > MythTV Forums: https://forum.mythtv.org
> >
> >
> > Guys
> >
> > Sorry to be a bit anal but a number have people have posted along the
> > lines of "....xscreensaver just works.....".
> >
> > This is an imprecise statement as I'd already stated that while
> > xscreensaver screen blanking does appear to work as required the power
> > management element of it is NOT working correctly, so people posting
> > that xscreensaver "just works" may not be using power management or
> > it's settings may be either not turned on or set for such a long time
> > window that they don't 'see' the problem.
> >
> > Could users possibly try the following.....
> >
> > In xscreensaver settings
> >
> > advanced settings
> >
> > Display Power Management
> >
> > Turn on >> Power Management Enabled
> >
> > Set "Standby After" for say two minutes
> >
> > In the 'Display Modes" setting set "Blank After" for say 5 minutes
> > (any value larger then the period set in "Standby After" above works
> > here)
> >
> > exit the settings
> >
> > start mythfrontend and start playing a video and leave it running with
> > no further key presses or remote inputs
> >
> > see if the screen goes into power save mode after the period set in
> > "Standby After" even though a video is running.
> >
> > I'd be interested to hear if people are surprised to find that Power
> > Save kicks in even though a video is running.....this is not the
> > desired behaviour but is what I'm seeing.
>
> Confirmed.  On my Ubuntu 12.04 LTS FE/BE if Power Management is enabled
> then the video output powers down while Myth is playing a video.  The
> relevant settings in ~/.xscreensaver are:
>
> timeout:        0:03:00  # time to screensaver start
> dpmsEnabled:    True
> dpmsStandby:    0:04:00  # time to black screen
> dpmsSuspend:    0:04:00  # time to DPMS power saving
> dpmsOff:        0:05:00  # time to DPMS off
>
> These override any DPMS settings in xorg.conf.
>
> So it would appear that the X server requires real keyboard input or
> stimulating in a different way.  DPMS can be disabled with 'xset -dpms'.
> Alternatively use xsendkey or xdotool to simulate a key-press every
> minute.
>
> FWIW I have DPMS disabled and use Myth's idle timeout and mythshutdown
> to put the system into 'Suspend To RAM'.
>

I played a little with xscreensaver's DPMS but it didn't work correctly (it
may have been the same symptoms but I don't recall), but I did use DPMS via
`xset dpms 120 240 300` in my .xinitrc (very short timeouts) and it worked
great on a remote frontend through the VGA port. It never blanked the
screen while a video/recording was playing, but while paused or in the
menus it followed the timeouts. This was a 0.27+ frontend.

Karl
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