In recent X servers gnome-screensaver's fade-to-screensaver has lost the ability to be interrupted. Tim Taiwanese Liim's analysis on the Fedora bug¹ lead to an edge case in the SYNC extension.
If the WakeupHandler is called exactly on the threshold of a NegativeTransition trigger then SyncComputeBracketValues can unset the upper bracket bound, resulting in the idle counter not being updated past the threshold. Since a NegativeTransition is only triggered in the transition from strictly greater than to below the threshold, this results in the NegativeTransition not firing. Bug references: [1] Fedora: https://bugzilla.redhat.com/show_bug.cgi?id=612620 about Ubuntu: http://bugs.launchpad.net/bugs/595555 _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
