VLC launches xdg-screensaver as /bin/sh /usr/bin/xdg-screensaver suspend 0x050006a4 but that doesn't prevent the gnome-screensaver from locking the screen while VLC is playing. See also http://forum.videolan.org/viewtopic.php?f=13&t=84488&p=279127 , linked from https://bugzilla.rpmfusion.org/show_bug.cgi?id=829 . xdg-utils-1.0.2-21.20101028.fc14.noarch vlc-1.1.5-1.fc14.i686
Bug still there in Fedora 15 / Gnome 3. By the way a bug has been also filed in Ubuntu's Launchpad. It's about KDE4 but it could maybe help. A patch is provided: https://bugs.launchpad.net/xdg-utils/+bug/805386 xdg-utils-1.1.0-0.8.20110510.fc15.noarch vlc-1.1.12-1.fc15.x86_64
Running xdg-screensaver manually on a VLC window doesn't help: xdg-screensaver suspend 0x3000013
Bug still there in Fedora 16 / Gnome 3.2.1. xdg-utils-1.1.0-0.9.20110714.fc16.noarch vlc-1.1.12-1.fc16.x86_64
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