light-locker locks the screen when Flash is running in (full-screened) Firefox. xfce4-power-manager 1.4.1 on Arch Linux.
Workaround is to edit /usr/bin/xflock4 and add: "light-locker-command -l" (with quotation marks) after for lock_cmd in \
xflock isn't part of xfce4-power-manager, but xfce4-session and I'm not sure what the bugreport is. Is it supposed to be a bug in light-locker because it locks the screen? Or a bug in xflock because it doesn't support light-locker?
(In reply to Simon Steinbeiss from comment #2) > xflock isn't part of xfce4-power-manager, but xfce4-session and I'm not sure > what the bugreport is. Is it supposed to be a bug in light-locker because it > locks the screen? > Or a bug in xflock because it doesn't support light-locker? I think it is because xflock doesn't support light-locker, consequently xfce4-power-manager's Presentation Mode doesn't work when Flash is running. I cannot reproduce the bug again because I uninstalled Flash and upgraded xfce4-power-manager since then.
Right, I cannot tell how Flash (or your browser for that matter) inhibits the screensaver – or tries to. All I can say is that the presentation mode in xfce4-power-manager handles the X11 builtin screensaver now so it should work fine. So either the presentation mode is working in general or it isn't working at all (it isn't app-specific). My next question would have been whether you maybe have other screensavers (like xscreensaver) installed/running, but since you say you cannot reproduce the bug and I cannot either, I'm closing this bugreport until someone can and reopens it.