dino99, Are you using integrated Intel graphics or some other card? Can you provide output from this command?
lspci -k -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to totem in Ubuntu. https://bugs.launchpad.net/bugs/1745672 Title: Watching mp4 videos is broken Status in totem package in Ubuntu: Incomplete Bug description: Totem was well able to display mp4 video some days ago (local mp4 files on hdd); but now when one of these mp4 video is selected, totem start as expected, set the sound normally, but the 'video' part is fully broken: get a black screen with some colored rectangles and multicolored pixels on top of the screen. Starting totem into a terminal and playing a video, i get that output: oem@ubuntu:~$ totem DtsGetHWFeatures: Create File Failed DtsGetHWFeatures: Create File Failed Running DIL (3.22.0) Version DtsDeviceOpen: Opening HW in mode 0 DtsDeviceOpen: Create File Failed Totem 3.26.0-0ubuntu2 was working as expected. But the last changelog seems related to that problem: totem (3.26.0-0ubuntu3) bionic; urgency=medium * Drop patches that provided old-style decorations and menus for Unity7. This conveniently also fixes LP: #1502476. LP: #1719322 -- Daniel van Vugt <daniel.van.v...@canonical.com> Thu, 25 Jan 2018 05:42:51 +0800 note: the same mp4 videos can be smoothly played with vlc without problem at all. The session is a gnome-shell one under xorg. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: totem 3.26.0-0ubuntu3 ProcVersionSignature: Ubuntu 4.13.0-30.33-generic 4.13.13 Uname: Linux 4.13.0-30-generic x86_64 ApportVersion: 2.20.8-0ubuntu6 Architecture: amd64 CurrentDesktop: GNOME Date: Fri Jan 26 20:42:39 2018 EcryptfsInUse: Yes ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: totem UpgradeStatus: No upgrade log present (probably fresh install) XorgLog: Error: [Errno 2] No such file or directory: '/var/log/Xorg.0.log' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1745672/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp