Blinking windows when viewing all kde windows.

ganrob · 2024-12-25 11:15:46

Strange blinking of windows when viewing all windows on the desktop. Played only in this mode. wayland+nvidia.

seth · 2024-12-25 15:14:46

How "strange"? On/off, normal/black, funky colors, …?
For clarification: do you mean when entering the window overview mode in KDE or do all KDE clients blink all the time?

qdbus6 org.kde.KWin /KWin supportInformation

ganrob · 2025-06-04 22:17:26

seth wrote:

How "strange"? On/off, normal/black, funky colors, …?
For clarification: do you mean when entering the window overview mode in KDE or do all KDE clients blink all the time?
qdbus6 org.kde.KWin /KWin supportInformation

Hi, thank you for your answer. I find that it is a bug in KDE.... Waiting.
https://bugs.kde.org/show_bug.cgi?id=495791

seth · 2025-06-04 22:46:39

Try to add

export KWIN_FORCE_SW_CURSOR=1

somewhere in /etc/profile*

ganrob · 2025-06-05 11:23:56

seth wrote:

Try to add
export KWIN_FORCE_SW_CURSOR=1
somewhere in /etc/profile*

Unfortunately, it didn't works for me.

 # /etc/profile

# Append "$1" to $PATH when not already in.
# This function API is accessible to scripts in /etc/profile.d
append_path () {
    case ":$PATH:" in
        *:"$1":*)
            ;;
        *)
            PATH="${PATH:+$PATH:}$1"
    esac
}

# Append our default paths
append_path '/usr/local/sbin'
append_path '/usr/local/bin'
append_path '/usr/bin'

# Force PATH to be environment
export PATH

#
# Load profiles from /etc/profile.d
if test -d /etc/profile.d/; then
        for profile in /etc/profile.d/*.sh; do
                test -r "$profile" && . "$profile"
        done
        unset profile
fi

# unset GLOBSORT, before anything else is sourced
# This variable will be part of bash => 5.3
# The rationale is that the user should always be able
# to expect that the snippets be processed in a deterministic order.
unset -v GLOBSORT

# Unload our profile API functions
unset -f append_path

# Source global bash config, when interactive but not posix or sh mode
if test "$BASH" &&\
   test "$PS1" &&\
   test -z "$POSIXLY_CORRECT" &&\
   test "${0#-}" != sh &&\
   test -r /etc/bash.bashrc
then
        . /etc/bash.bashrc
fi

# Termcap is outdated, old, and crusty, kill it.
unset TERMCAP

# Man is much better than us at figuring this out
unset MANPATH

export KWIN_FORCE_SW_CURSOR=1

Last edited by ganrob (2025-06-05 11:52:34)

seth · 2025-06-05 14:24:08

Just to be sure, you did re-login afterwards?
The video in the linked bug looks like some windows are simply skipped on individual frames - there're no artifacts or so, the windows just disappear and then show up on the next frame.
This cannot even be explained w/ EGL_BUFFER_AGE_EXT …

Do you get different behavior w/ "export QSG_RHI_BACKEND=opengl" and "export QSG_RHI_BACKEND=vulkan"?

ganrob · 2025-06-05 14:49:33

seth wrote:

Just to be sure, you did re-login afterwards?
The video in the linked bug looks like some windows are simply skipped on individual frames - there're no artifacts or so, the windows just disappear and then show up on the next frame.
This cannot even be explained w/ EGL_BUFFER_AGE_EXT …
Do you get different behavior w/ "export QSG_RHI_BACKEND=opengl" and "export QSG_RHI_BACKEND=vulkan"?

I should write it "export QSG_RHI_BACKEND=opengl" or "export QSG_RHI_BACKEND=vulkan" in /etc/profile* ?

seth · 2025-06-05 14:55:41

The idea is to test one and then to other value to see whether either of them has any impact.

ganrob · Yesterday 15:45:01

seth wrote:

The idea is to test one and then to other value to see whether either of them has any impact.

Both of them not working.

seth · Yesterday 18:37:13

Does "export QSG_RHI_BACKEND=software"? (Don't use that as solution, you'll render stuff in software - the question is whether this is because of the QtQuick SceneGraph at all)

Arch Linux

#1 2024-12-25 11:15:46

Blinking windows when viewing all kde windows.

#2 2024-12-25 15:14:46

Re: Blinking windows when viewing all kde windows.

#3 2025-06-04 22:17:26

Re: Blinking windows when viewing all kde windows.

#4 2025-06-04 22:46:39

Re: Blinking windows when viewing all kde windows.

#5 2025-06-05 11:23:56

Re: Blinking windows when viewing all kde windows.

#6 2025-06-05 14:24:08

Re: Blinking windows when viewing all kde windows.

#7 2025-06-05 14:49:33

Re: Blinking windows when viewing all kde windows.

#8 2025-06-05 14:55:41

Re: Blinking windows when viewing all kde windows.

#9 Yesterday 15:45:01

Re: Blinking windows when viewing all kde windows.

#10 Yesterday 18:37:13

Re: Blinking windows when viewing all kde windows.

Board footer