Bug#981696: plasma-desktop: Flickering on login screen and default panel when moving the mouse over icons

[gigelu]

Package: plasma-desktop
Version: 4:5.20.5-3
Severity: normal
X-Debbugs-Cc: bu...@gigelu.ro

Dear Maintainer,

On a fresh install of Debian 11 with KDE I have this display bug:
https://i.imgur.com/CaUUnvU.gif
https://i.imgur.com/VMfzVZo.gif

My desktop has an ASUS H170 PRO GAMING motherboard with an Intel Core
I7-6700K CPU and an NVIDIA GTX 1060 video card.

On the default configuration, with the Nvidia card, the bug is not
present.
I want to passthrough the Nvidia card to kvm, so I am using vfio to
disable it from the running system.

/etc/initramfs-tools/modules
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd

/etc/modprobe.d/vfio.conf
options vfio-pci ids=10de:1c03,10de:10f1

To use the CPU's integrated video I am using this configuration:

/etc/X11/xorg.conf.d/20-intel.conf
Section "Extensions"
Option "XVideo" "Disable"
EndSection
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
Option "TearFree" "true"
Option "DRI" "true"
EndSection

I have tried using the intel-media-va-driver or the
intel-media-va-driver-non-free or none of them with no change.

I used the same configuration on Debian versions 8 and 10 with no
problem.



-- System Information:
Debian Release: bullseye/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-2-amd64 (SMP w/8 CPU threads)
Locale: LANG=ro_RO.UTF-8, LC_CTYPE=ro_RO.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages plasma-desktop depends on:
ii accountsservice 0.6.55-3
ii breeze 4:5.20.5-2
ii kactivitymanagerd 5.20.5-1
ii kde-cli-tools 4:5.20.5-2
ii kded5 5.78.0-2
ii kio 5.78.0-2
ii kpackagetool5 5.78.0-3
ii libaccounts-qt5-1 1.16-2
ii libc6 2.31-9
ii libcrypt1 1:4.4.17-1
ii libglib2.0-0 2.66.4-1
ii libibus-1.0-5 1.5.23-2
ii libkaccounts2 4:20.12.1-1
ii libkf5activities5 5.78.0-2
ii libkf5activitiesstats1 5.78.0-2
ii libkf5authcore5 5.78.0-2
ii libkf5baloo5 5.78.0-2
ii libkf5codecs5 5.78.0-2
ii libkf5completion5 5.78.0-3
ii libkf5configcore5 5.78.0-3
ii libkf5configgui5 5.78.0-3
ii libkf5configwidgets5 5.78.0-2
ii libkf5coreaddons5 5.78.0-2
ii libkf5crash5 5.78.0-3
ii libkf5dbusaddons5 5.78.0-2
ii libkf5declarative5 5.78.0-2
ii libkf5globalaccel-bin 5.78.0-2
ii libkf5globalaccel5 5.78.0-2
ii libkf5guiaddons5 5.78.0-3
ii libkf5i18n5 5.78.0-2
ii libkf5iconthemes5 5.78.0-2
ii libkf5itemviews5 5.78.0-2
ii libkf5kcmutils5 5.78.0-3
ii libkf5kdelibs4support5 5.78.0-2
ii libkf5kiocore5 5.78.0-2
ii libkf5kiofilewidgets5 5.78.0-2
ii libkf5kiogui5 5.78.0-2
ii libkf5kiowidgets5 5.78.0-2
ii libkf5notifications5 5.78.0-2
ii libkf5notifyconfig5 5.78.0-2
ii libkf5package5 5.78.0-3
ii libkf5plasma5 5.78.0-3
ii libkf5plasmaquick5 5.78.0-3
ii libkf5quickaddons5 5.78.0-2
ii libkf5runner5 5.78.0-3
ii libkf5service-bin 5.78.0-2
ii libkf5service5 5.78.0-2
ii libkf5solid5 5.78.0-2
ii libkf5sonnetcore5 5.78.0-2
ii libkf5sonnetui5 5.78.0-2
ii libkf5wallet-bin 5.78.0-2
ii libkf5wallet5 5.78.0-2
ii libkf5widgetsaddons5 5.78.0-2
ii libkf5windowsystem5 5.78.0-2
ii libkf5xmlgui5 5.78.0-2
ii libkworkspace5-5 4:5.20.5-3
ii libnotificationmanager1 4:5.20.5-3
ii libphonon4qt5-4 4:4.11.1-3
ii libprocesscore9 4:5.20.5-1
ii libqt5concurrent5 5.15.2+dfsg-3
ii libqt5core5a 5.15.2+dfsg-3
ii libqt5dbus5 5.15.2+dfsg-3
ii libqt5gui5 5.15.2+dfsg-3
ii libqt5network5 5.15.2+dfsg-3
ii libqt5qml5 5.15.2+dfsg-3
ii libqt5quick5 5.15.2+dfsg-3
ii libqt5quickwidgets5 5.15.2+dfsg-3
ii libqt5sql5 5.15.2+dfsg-3
ii libqt5widgets5 5.15.2+dfsg-3
ii libqt5x11extras5 5.15.2-2
ii libqt5xml5 5.15.2+dfsg-3
ii libscim8v5 1.4.18-2.2
ii libstdc++6 10.2.1-6
ii libtaskmanager6abi1 4:5.20.5-3
ii libx11-6 2:1.7.0-2
ii libx11-xcb1 2:1.7.0-2
ii libxcb-keysyms1 0.4.0-1+b2
ii libxcb-record0 1.14-2.1
ii libxcb-xkb1 1.14-2.1
ii libxcb1 1.14-2.1
ii libxcursor1 1:1.2.0-2
ii libxi6 2:1.7.10-1
ii libxkbcommon0 1.0.3-2
ii libxkbfile1 1:1.1.0-1
ii oxygen-sounds 4:5.20.5-1
ii phonon4qt5 4:4.11.1-3
ii plasma-desktop-data 4:5.20.5-3
ii plasma-framework 5.78.0-3
ii plasma-integration 5.20.5-1
ii plasma-workspace 4:5.20.5-3
ii polkit-kde-agent-1 4:5.20.5-1
ii qml-module-org-kde-draganddrop 5.78.0-2
ii qml-module-org-kde-kcoreaddons 5.78.0-2
ii qml-module-org-kde-kquickcontrols 5.78.0-2
ii qml-module-org-kde-kquickcontrolsaddons 5.78.0-2
ii qml-module-org-kde-kwindowsystem 5.78.0-2
ii qml-module-org-kde-qqc2desktopstyle 5.78.0-2
ii qml-module-org-kde-solid 5.78.0-2
ii qml-module-qt-labs-folderlistmodel 5.15.2+dfsg-3
ii qml-module-qt-labs-settings 5.15.2+dfsg-3

Versions of packages plasma-desktop recommends:
ii bluedevil 4:5.20.5-1
ii breeze-gtk-theme 5.20.5-1
ii fonts-hack 3.003-3
ii fonts-noto 20201225-1
ii ibus-data 1.5.23-2
ii kde-config-gtk-style 4:5.20.5-2
ii kde-config-screenlocker 5.20.5-1
ii kde-config-sddm 4:5.20.5-1
ii kde-style-oxygen-qt5 4:5.20.5-1
ii kgamma5 5.20.5-1
ii khelpcenter 4:20.12.0-1
ii khotkeys 4:5.20.5-1
ii kinfocenter 4:5.20.5-1
ii kio-extras 4:20.12.0-1
ii kmenuedit 4:5.20.5-1
ii kscreen 4:5.20.5-1
ii ksshaskpass 4:5.20.5-1
ii ksysguard 4:5.20.5-2
ii kwin-x11 [kwin] 4:5.20.5-1
ii kwrited 4:5.20.5-1
ii libpam-kwallet5 5.20.5-1
ii plasma-discover 5.20.5-2
ii plasma-disks 5.20.5-1
ii plasma-pa 4:5.20.5-1
ii powerdevil 4:5.20.5-2
ii systemsettings 4:5.20.5-2

plasma-desktop suggests no packages.

-- no debconf information

[bu...@gigelu.ro]

Removing /etc/X11/xorg.conf.d/20-intel.conf fixes the issue.

[Lisandro Damián Nicanor Pérez Meyer]

Hi!

On Mon, 29 Mar 2021 at 07:21, <bu...@gigelu.ro> wrote:
>
> Removing /etc/X11/xorg.conf.d/20-intel.conf fixes the issue.

Thisis by no means a KDE bug but some configuration issue, as you just
discovered by removing that file. I sincerely don't know if it should
be reassigned to some X package or not....

--
Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/

[Norbert Preining]

Hi

> Removing /etc/X11/xorg.conf.d/20-intel.conf fixes the issue.

Since this is not a file that is normally shipped with Debian - at least
I don't see it in the archive - I guess it has been created by you.

In this case, I guess the bug should be closed.

Best

Norbert

--
PREINING Norbert https://www.preining.info
Fujitsu Research Labs + IFMGA Guide + TU Wien + TeX Live + Debian Dev
GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13