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VLC and xscreensaver problem
Posted: 26 May 2015 10:44
by aitte
VLC didn't block xscreensaver.
Advanced Settings - Video - Disable Screensaver - activated
VLC version 2.2.1, xscreensaver version 5.32.
Re: VLC and xscreensaver problem
Posted: 26 May 2015 11:07
by Rémi Denis-Courmont
This is usually caused by one of those:
- the desktop environment providing a non-working D-Bus screensaver object,
- xdg-screensaver (xdg-utils) missing, or
- a buggy version of xdg-screensaver installed.
Re: VLC and xscreensaver problem
Posted: 26 May 2015 11:17
by aitte
This is usually caused by one of those:
- the desktop environment providing a non-working D-Bus screensaver object,
- xdg-screensaver (xdg-utils) missing, or
- a buggy version of xdg-screensaver installed.
xdg-utils is installed 1.1.0~rc1-2ubuntu7.1 on ubuntu 14.04. screensaver blocking worked with gnome-screensaver (but I switched to xscreensaver for security reasons). Also xscreensaver is blocking nicely when using smplayer(sorry for mention it here)
The following utilities are included:
xdg-screensaver
the desktop environment providing a non-working D-Bus screensaver object
How to check that?
Re: VLC and xscreensaver problem
Posted: 26 May 2015 11:34
by Rémi Denis-Courmont
Any D-Bus debugger will do. I use d-feet.
Re: VLC and xscreensaver problem
Posted: 26 May 2015 13:07
by aitte
![Image](http://s7.postimg.org/cg1iznwc9/tmp.png)
All is ok with dbus.
Re: VLC and xscreensaver problem
Posted: 27 May 2015 07:57
by aitte
xscreensaver not support dbus. And it'll never be implemented for security reasons.
http://www.jwz.org/xscreensaver/toolkits.html
Maybe vlc support command execution, like here:
http://www.jwz.org/xscreensaver/faq.html#dvd
Xscreensaver is historically most used and first screensaver for Xorg. Should I fill bug report on vlc bug tracker?
Re: VLC and xscreensaver problem
Posted: 27 May 2015 09:36
by Rémi Denis-Courmont
No. VLC checks if D-Bus screensaver API is available. If it is not, then it falls back to (actually much less safe) command line execution.
From my PoV, this is a bug in your system. The D-Bus API should not be shown if it does not work.
Re: VLC and xscreensaver problem
Posted: 27 May 2015 11:33
by aitte
No. VLC checks if D-Bus screensaver API is available. If it is not, then it falls back to (actually much less safe) command line execution.
From my PoV, this is a bug in your system. The D-Bus API should not be shown if it does not work.
Dbus is working, but there is no actual dbus support in xscreensaver. For example when gnome-screensaver is activated gnome-screensaver report events to dbus, and vlc know what to do. But since xscreensaver has no build in dbus support, vlc detect dbus in system but don't know screensaver state since xscreensaver don't support dbus and reports no information to dbus. And as result vlc dot block screensaver at all, since vlc wait for dbus screensaver state thats never reported.
Re: VLC and xscreensaver problem
Posted: 27 May 2015 13:22
by Rémi Denis-Courmont
That's what I'm saying: your system is broken. It exposes a nonoworking DBus screensaver object.
Re: VLC and xscreensaver problem
Posted: 27 May 2015 14:24
by aitte
That's what I'm saying: your system is broken. It exposes a nonoworking DBus screensaver object.
I inspected that org.freedesktop.Screensaver and find pid, it was /usr/lib/unity-settings-daemon/unity-settings-daemon that exist like one of gnome-flashback dependencies. I removed libscreensaver-proxy.so and screensaver-proxy.gnome-settings-plugin files from /usr/lib/unity-settings-daemon-1.0/, restart session and now org.freedesktop.Screensaver object not exist under session bus. But looks like vlc still don't fall back to command line execution mode.
Re: VLC and xscreensaver problem
Posted: 27 May 2015 14:47
by Rémi Denis-Courmont
VLC falls back to xdg-utils if it cannot find a D-Bus screensaver.
Re: VLC and xscreensaver problem
Posted: 27 May 2015 16:34
by aitte
xdg-screensaver status
enabled
xdg-screensaver lock
xscreensaver locks screen
Looks like xdg-screensaver is working.
I checked all bus names under system and session bus, no mention of screensaver or something like that this time.