<html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> Hi all- I'm looking through bugs on Launchpad but haven't seen anything related to this yet, and I wanted to bring this to everyone's attention ASAP. I'm running Kubuntu Bionic on my laptop: a 3rd-gen Thinkpad X1 Carbon, and `lspci` tells me that my video hardware is a "VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09)". After installing some updates on the 21st or 22nd, I found that my Kubuntu installation had terrible video performance: graphical animations were choppy, there was noticeable stutter when moving windows around the screen, and the "blur" effect was initially disabled for the taskbar and application launcher menu. I use btrfs, and my systems are configured to take snapshots of all available subvolumes on every boot, so I could easily roll back my root subvolume to the previous state -- I kept the subvolume for the "bad" state so I could examine the apt log, though. One or more of these updates seems to have caused this (directly from apt.log): """ Start-Date: 2018-02-20 19:52:00 Commandline: apt full-upgrade Requested-By: mruffalo (1000) Upgrade: libdrm-nouveau2:amd64 (2.4.89-1, 2.4.90-1), libdrm-nouveau2:i386 (2.4.89-1, 2.4.90-1), libdrm-amdgpu1:amd64 (2.4.89-1, 2.4.90-1), libdrm-amdgpu1:i386 (2.4.89-1, 2.4.90-1), libdrm2:amd64 (2.4.89-1, 2.4.90-1), libdrm2:i386 (2.4.89-1, 2.4.90-1), libdrm-intel1:amd64 (2.4.89-1, 2.4.90-1), libdrm-intel1:i386 (2.4.89-1, 2.4.90-1), libdrm-radeon1:amd64 (2.4.89-1, 2.4.90-1), libdrm-radeon1:i386 (2.4.89-1, 2.4.90-1), libdrm-common:amd64 (2.4.89-1, 2.4.90-1) End-Date: 2018-02-20 19:52:12 Start-Date: 2018-02-21 10:38:15 Commandline: apt full-upgrade Requested-By: mruffalo (1000) Install: libegl1:amd64 (0.2.999+git20170802-2, automatic), libglvnd0:amd64 (0.2.999+git20170802-2, automatic) Upgrade: milou:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), python3-distro-info:amd64 (0.17, 0.18), libkwinglutils11:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-workspace:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libtaskmanager6:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libplasma-geolocation-interface5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), liboxygenstyle5-5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libksignalplotter7:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), gtk3-engines-breeze:amd64 (5.12.1-0ubuntu1, 5.12.2-0ubuntu1), libqt5test5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), libpowerdevilui5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kde-cli-tools:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kde-config-gtk-style:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), bluedevil:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), qt5-gtk-platformtheme:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), kde-config-gtk-style-preview:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), breeze-cursor-theme:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-nm:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-pa:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libpam-kwallet-common:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-dataengines-addons:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libprocesscore7:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kwin-style-breeze:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kwin-data:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), ksshaskpass:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-wallpapers-addons:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libkf5sysguard-bin:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), systemsettings:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-discover-common:amd64 (5.12.1-0ubuntu2, 5.12.2-0ubuntu1), kde-style-breeze:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5dbus5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), kmenuedit:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5sql5-sqlite:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), khotkeys:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-discover:amd64 (5.12.1-0ubuntu2, 5.12.2-0ubuntu1), python-cairo:amd64 (1.15.4-2, 1.16.2-1), libqt5widgets5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), breeze:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kde-style-oxygen-qt5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-desktop:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kactivitymanagerd:amd64 (5.12.1-0ubuntu1, 5.12.2-0ubuntu1), libkdecorations2-5v5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), initramfs-tools-bin:amd64 (0.130ubuntu2, 0.130ubuntu3), user-manager:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kde-style-breeze-qt4:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libkwineffects11:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-desktop-data:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), powerdevil-data:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libksgrd7:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5xml5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), libkworkspace5-5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5printsupport5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), kwin-addons:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kde-cli-tools-data:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5concurrent5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), plasma-runners-addons:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), oxygen-sounds:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5gui5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), kde-config-sddm:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libkscreenlocker5:amd64 (5.12.1-0ubuntu1, 5.12.2-0ubuntu1), libpam-kwallet4:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libpam-kwallet5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kgamma5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), sddm-theme-breeze:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kwayland-integration:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kinfocenter:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libgcrypt20:amd64 (1.8.1-4, 1.8.1-4ubuntu1), libgcrypt20:i386 (1.8.1-4, 1.8.1-4ubuntu1), libkf5screen-bin:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kwrited:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libkf5screen7:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kwin:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libcolorcorrect5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5core5a:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), plasma-integration:amd64 (5.12.1-0ubuntu1, 5.12.2-0ubuntu1), kwin-x11:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), drkonqi:amd64 (5.12.1-0ubuntu1, 5.12.2-0ubuntu1), ksysguard-data:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libkwin4-effect-builtins1:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5opengl5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), ksysguardd:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), python3-cairo:amd64 (1.15.4-2, 1.16.2-1), libkfontinstui5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kscreen:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5network5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), libkfontinst5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), polkit-kde-agent-1:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libkf5sysguard-data:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kde-config-screenlocker:amd64 (5.12.1-0ubuntu1, 5.12.2-0ubuntu1), khotkeys-data:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kdeplasma-addons-data:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), liboxygenstyleconfig5-5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libkwinxrenderutils11:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-look-and-feel-org-kde-breezedark-desktop:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), breeze-gtk-theme:amd64 (5.12.1-0ubuntu1, 5.12.2-0ubuntu1), powerdevil:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libpowerdevilcore2:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libprocessui7:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libkdecorations2private5v5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), ksysguard:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), initramfs-tools-core:amd64 (0.130ubuntu2, 0.130ubuntu3), kwin-common:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), initramfs-tools:amd64 (0.130ubuntu2, 0.130ubuntu3), qml-module-qtquick-controls-styles-breeze:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libqt5sql5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), plasma-widgets-addons:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libssl1.0.0:amd64 (1.0.2n-1ubuntu2, 1.0.2n-1ubuntu3), libqt5sql5-mysql:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4), libweather-ion7:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1) End-Date: 2018-02-21 10:42:56 """ I haven't yet narrowed down exactly which package(s) may have caused this, but if I had to guess, I would probably lean toward 'libdrm-intel1'. I also booted my laptop from today's (2018-02-23) daily Kubuntu desktop-amd64 ISO, and saw exactly the same poor graphical performance. (It seemed worth it to rule out some oddity in my configuration, since I think this Linux installation on my laptop dates back to the early development version of Artful.) I haven't yet had a chance to boot today's daily Ubuntu ISO, but it would be interesting to see whether or not this is specific to Kubuntu vs. Ubuntu. Thank you, MMR... </body> </html>