I'm really not sure what changed to make 4K video so stuttery now in totem. The CPU is fairly low and goes through the roof only if I uninstall VAAPI. So VAAPI is working, and it works smoothly in mpv too.
Since I could last play 4K smoothly in totem there has been: * A mesa update 17.2 -> 18.0 * A Xorg update 1.19.5 -> 1.19.6 * Kernel updates * Hardware changes (I changed from a Haswell to Kaby Lake desktop) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to clutter-gtk in Ubuntu. https://bugs.launchpad.net/bugs/1698270 Title: Totem pauses and stutters during video playback even when CPU usage is low Status in GTK+: Fix Released Status in totem-pl-parser: Confirmed Status in clutter-1.0 package in Ubuntu: Won't Fix Status in clutter-gtk package in Ubuntu: Fix Released Status in gtk+3.0 package in Ubuntu: Fix Released Status in totem package in Ubuntu: Confirmed Status in totem-pl-parser package in Ubuntu: Fix Released Bug description: Totem pauses and stutters during video playback even when CPU usage is low. After figuring out how to play videos with full hardware accelerated decoding (e.g. <= 10% CPU), I was surprised to find Totem still pauses and stutters during playback. Other apps like Mplayer, VLC and even gst-play-1.0 never have this problem. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: totem 3.24.0-0ubuntu1 ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15 Uname: Linux 4.10.0-22-generic x86_64 ApportVersion: 2.20.5-0ubuntu4 Architecture: amd64 Date: Fri Jun 16 12:03:18 2017 InstallationDate: Installed on 2017-05-03 (44 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170502) SourcePackage: totem UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gtk/+bug/1698270/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp