I tried to watch tv yesterday and I just get a black window with no sound. It used to perfectly work last week.
I tried with an older kernel (4.4.0-28 instead of 4.4.0-31) but the problem is still there.
In the apt history I identified the upgrades made during the last week which may have break kaffeine:
Start-Date: 2016-07-16 19:04:55
Commandline: aptdaemon role='role-install-packages' sender=':1.85'
Install: librubberband2v5:amd64 (1.8.1-6ubuntu2, automatic), mpv:amd64 (0.14.0-1build1)
End-Date: 2016-07-16 19:04:58
Start-Date: 2016-07-18 18:14:35
Commandline: aptdaemon role='role-commit-packages' sender=':1.314'
Upgrade: unity-schemas:amd64 (7.4.0+16.04.20160526.1-0ubuntu1, 7.4.0+16.04.20160715-0ubuntu1), unity-control-center-faces:amd64 (15.04.0+16.04.20160413-0ubuntu3, 15.04.0+16.04.20160705-0ubuntu1), bamfdaemon:amd64 (0.5.3~bzr0+16.04.20160523-0ubuntu1, 0.5.3~bzr0+16.04.20160701-0ubuntu1), gstreamer1.0-plugins-good:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), unity:amd64 (7.4.0+16.04.20160526.1-0ubuntu1, 7.4.0+16.04.20160715-0ubuntu1), libgstreamer-plugins-good1.0-0:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), unity-control-center:amd64 (15.04.0+16.04.20160413-0ubuntu3, 15.04.0+16.04.20160705-0ubuntu1), gstreamer1.0-pulseaudio:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), adapta-gtk-theme:amd64 (3.21.3+git20160715-0ubuntu1~xenial1, 3.21.3+git20160717-0ubuntu1~xenial1), thunderbird-gnome-support:amd64 (1:38.8.0+build1-0ubuntu0.16.04.1, 1:45.2.0+build1-0ubuntu0.16.04.1), libbamf3-2:amd64 (0.5.3~bzr0+16.04.20160523-0ubuntu1, 0.5.3~bzr0+16.04.20160701-0ubuntu1), unity-services:amd64 (7.4.0+16.04.20160526.1-0ubuntu1, 7.4.0+16.04.20160715-0ubuntu1), libunity-core-6.0-9:amd64 (7.4.0+16.04.20160526.1-0ubuntu1, 7.4.0+16.04.20160715-0ubuntu1), thunderbird:amd64 (1:38.8.0+build1-0ubuntu0.16.04.1, 1:45.2.0+build1-0ubuntu0.16.04.1), libunity-control-center1:amd64 (15.04.0+16.04.20160413-0ubuntu3, 15.04.0+16.04.20160705-0ubuntu1), thunderbird-locale-fr:amd64 (1:38.8.0+build1-0ubuntu0.16.04.1, 1:45.2.0+build1-0ubuntu0.16.04.1)
End-Date: 2016-07-18 18:14:48
Start-Date: 2016-07-18 21:13:55
Commandline: apt upgrade
Requested-By: hadrien (1000)
Upgrade: libunity-settings-daemon1:amd64 (15.04.1+16.04.20160209-0ubuntu2, 15.04.1+16.04.20160701-0ubuntu1), libnm-glib4:amd64 (1.2.0-0ubuntu0.16.04.2, 1.2.0-0ubuntu0.16.04.3), gstreamer1.0-plugins-ugly-amr:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), gir1.2-networkmanager-1.0:amd64 (1.2.0-0ubuntu0.16.04.2, 1.2.0-0ubuntu0.16.04.3), gstreamer1.0-alsa:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), libnux-4.0-common:amd64 (4.0.8+16.04.20160209-0ubuntu2, 4.0.8+16.04.20160705-0ubuntu1), compiz-plugins-default:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), compiz-plugins:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), gstreamer1.0-plugins-base-apps:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), compiz-plugins-extra:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), update-notifier-common:amd64 (3.168, 3.168.1), libdecoration0:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), libsystemd0:amd64 (229-4ubuntu6, 229-4ubuntu7), gstreamer1.0-tools:amd64 (1.8.1-1~ubuntu1, 1.8.2-1~ubuntu1), libgstreamer1.0-0-dbg:amd64 (1.8.1-1~ubuntu1, 1.8.2-1~ubuntu1), binutils:amd64 (2.26.1-1ubuntu1~16.04, 2.26.1-1ubuntu1~16.04.1), unity-lens-applications:amd64 (7.1.0+16.04.20160217.2-0ubuntu1, 7.1.0+16.04.20160701-0ubuntu1), console-setup-linux:amd64 (1.108ubuntu15, 1.108ubuntu15.2), libpython3.5:amd64 (3.5.1-10, 3.5.2-2~16.01), python3.5:amd64 (3.5.1-10, 3.5.2-2~16.01), libnm-glib-vpn1:amd64 (1.2.0-0ubuntu0.16.04.2, 1.2.0-0ubuntu0.16.04.3), python3.5-minimal:amd64 (3.5.1-10, 3.5.2-2~16.01), compizconfig-settings-manager:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), gstreamer1.0-plugins-bad:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), udev:amd64 (229-4ubuntu6, 229-4ubuntu7), console-setup:amd64 (1.108ubuntu15, 1.108ubuntu15.2), metacity:amd64 (1:3.18.4-0ubuntu0.3, 1:3.18.5-0ubuntu0.1), gstreamer1.0-plugins-base:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), libnm0:amd64 (1.2.0-0ubuntu0.16.04.2, 1.2.0-0ubuntu0.16.04.3), libklibc:amd64 (2.0.4-8ubuntu1, 2.0.4-8ubuntu1.16.04.1), gstreamer1.0-plugins-bad-videoparsers:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), network-manager:amd64 (1.2.0-0ubuntu0.16.04.2, 1.2.0-0ubuntu0.16.04.3), apache2-data:amd64 (2.4.18-2ubuntu3, 2.4.18-2ubuntu3.1), libnux-4.0-0:amd64 (4.0.8+16.04.20160209-0ubuntu2, 4.0.8+16.04.20160705-0ubuntu1), libudev1:amd64 (229-4ubuntu6, 229-4ubuntu7), libudev1:i386 (229-4ubuntu6, 229-4ubuntu7), adapta-gtk-theme:amd64 (3.21.3+git20160717-0ubuntu1~xenial1, 3.21.4+git20160718-0ubuntu1~xenial1), libnm-util2:amd64 (1.2.0-0ubuntu0.16.04.2, 1.2.0-0ubuntu0.16.04.3), ubuntu-dev-tools:amd64 (0.155ubuntu1, 0.155ubuntu2), libudev-dev:amd64 (229-4ubuntu6, 229-4ubuntu7), metacity-common:amd64 (1:3.18.4-0ubuntu0.3, 1:3.18.5-0ubuntu0.1), libnss-myhostname:amd64 (229-4ubuntu6, 229-4ubuntu7), gstreamer1.0-plugins-bad-faad:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), systemd-sysv:amd64 (229-4ubuntu6, 229-4ubuntu7), libmetacity-private3a:amd64 (1:3.18.4-0ubuntu0.3, 1:3.18.5-0ubuntu0.1), libpam-systemd:amd64 (229-4ubuntu6, 229-4ubuntu7), libgstreamer-plugins-base1.0-0:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), gstreamer1.0-x:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), compiz-gnome:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), systemd:amd64 (229-4ubuntu6, 229-4ubuntu7), gir1.2-gst-plugins-base-1.0:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), libcompizconfig0:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), compiz:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), keyboard-configuration:amd64 (1.108ubuntu15, 1.108ubuntu15.2), gstreamer1.0-libav:amd64 (1.8.1-1~ubuntu1, 1.8.2-1~ubuntu1), python-ubuntutools:amd64 (0.155ubuntu1, 0.155ubuntu2), apache2-bin:amd64 (2.4.18-2ubuntu3, 2.4.18-2ubuntu3.1), unity-settings-daemon:amd64 (15.04.1+16.04.20160209-0ubuntu2, 15.04.1+16.04.20160701-0ubuntu1), gir1.2-gstreamer-1.0:amd64 (1.8.1-1~ubuntu1, 1.8.2-1~ubuntu1), libpython3.5-stdlib:amd64 (3.5.1-10, 3.5.2-2~16.01), python-compizconfig:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), compiz-core:amd64 (1:0.9.12.2+16.04.20160526-0ubuntu1, 1:0.9.12.2+16.04.20160714-0ubuntu1), apache2:amd64 (2.4.18-2ubuntu3, 2.4.18-2ubuntu3.1), libpython3.5-minimal:amd64 (3.5.1-10, 3.5.2-2~16.01), apache2-utils:amd64 (2.4.18-2ubuntu3, 2.4.18-2ubuntu3.1), klibc-utils:amd64 (2.0.4-8ubuntu1, 2.0.4-8ubuntu1.16.04.1), nux-tools:amd64 (4.0.8+16.04.20160209-0ubuntu2, 4.0.8+16.04.20160705-0ubuntu1), libgstreamer-plugins-bad1.0-0:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1), update-notifier:amd64 (3.168, 3.168.1), libgstreamer1.0-0:amd64 (1.8.1-1~ubuntu1, 1.8.2-1~ubuntu1), gstreamer1.0-plugins-ugly:amd64 (1.8.1-1ubuntu0.1, 1.8.2-1ubuntu0.1)
End-Date: 2016-07-18 21:14:46
Start-Date: 2016-07-18 21:19:39
Commandline: apt autoremove
Requested-By: hadrien (1000)
Remove: linux-image-4.4.0-22-generic:amd64 (4.4.0-22.40), linux-image-extra-4.4.0-22-generic:amd64 (4.4.0-22.40), linux-image-4.4.0-24-generic:amd64 (4.4.0-24.43), linux-headers-4.4.0-22:amd64 (4.4.0-22.40), linux-headers-4.4.0-24:amd64 (4.4.0-24.43), linux-image-extra-4.4.0-24-generic:amd64 (4.4.0-24.43), linux-headers-4.4.0-24-generic:amd64 (4.4.0-24.43), linux-headers-4.4.0-22-generic:amd64 (4.4.0-22.40)
End-Date: 2016-07-18 21:20:07
Start-Date: 2016-07-18 21:21:19
Commandline: apt-get install grub-customizer
Requested-By: hadrien (1000)
Install: libhd21:amd64 (21.23-1, automatic), grub-customizer:amd64 (5.0.6-0ubuntu1~ppa1x), hwinfo:amd64 (21.23-1, automatic), libx86emu1:amd64 (1.5-1, automatic)
End-Date: 2016-07-18 21:21:21
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: kaffeine (not installed)
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Jul 22 19:09:04 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-10-20 (1006 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: kaffeine
UpgradeStatus: Upgraded to xenial on 2016-04-21 (91 days ago)
Ubuntu 16.04 x64, kernel 4.4.0-31
Kaffeine 2.0.0
Using:
KDE Frameworks 5.18.0
Qt 5.5.1 (built against 5.5.1)
The xcb windowing system