Bug#757463: vlc unblanks X screen when paused

[sacrificial-spam-address at horizon.com]

Package: vlc
Version: 2.1.5-1
Architecture: i386

To reproduce:
1. Play any video in vlc
2. Pause playback
3. (optional) iconify VLC
4. xset dpms force off
5. Wait about 30 seconds

Expected: Screen stays off indefinitely
Observed: Screen unblanks in less than a minute

If VLC is not running, or is stopped, this doesn't happen.

(I know that VLC causes this and other X applications I have tested
do not, but it's possible it's am X server bug in response to some
message that's not supposed to unblank the screen.)

Given that "xset dpms force off" is essentially what the default
laptop lid-close  script does, the fact that the backlight comes back
on is rather annoying.  It achieves nothing but draining the
battery and wearing out the backlight,

This is an up-to-date Debian unstable i386 machine, using Intel
945 integrated graphics with the xserver-xorg-video-intel driver.

This might be related to my earlier bug about vlc keeping busy during
pause, but I'm not sure so I'm submitting them as two spearate issues.

Thank you very much!