I have a weird issue for you.
I have a Laptop that I move between two work stations. One has a 4k (used at 2k) and 1080p monitors and the other (which has the issues) has 2 4k (also used at 2k) and 1080p monitors. For the first I use the laptop’s screen, for the second setup I don’t (laptop is closed).
Now when I configure 3 taskbars and start 2 programs like Slack and Terminal plasma freezes. The taskbars are unresponsive. Context menu on the background or taskbars doesn’t work anymore. And additionally everything lags visually. This only happens when the 3 taskbars are there during login. If I add then third one in operation everything is fine. Also having 3 taskbars on my other setup is completely fine.
I already have compositor disabled. So far it didn’t matter which 2 programs I started. Whenever the second window opens Plasma freezes. The programs continue to work, but it’s a slide show. From a while back I think in this state the CPU is at 100% (currently can’t confirm).
Working ~/.config/plasma-org.kde.plasma.desktop-appletsrc:
[ActionPlugins][0]
MiddleButton;NoModifier=org.kde.paste
RightButton;NoModifier=org.kde.contextmenu
wheel:Vertical;NoModifier=org.kde.switchdesktop
[ActionPlugins][1]
RightButton;NoModifier=org.kde.contextmenu
[Containments][1]
ItemGeometries-2560x1440=
ItemGeometriesHorizontal=
activityId=52fecab1-0316-44ae-a623-f1b817802be0
formfactor=0
immutability=1
lastScreen=0
location=0
plugin=org.kde.plasma.folder
wallpaperplugin=org.kde.image
[Containments][1][ConfigDialog]
DialogHeight=540
DialogWidth=720
[Containments][1][General]
ToolBoxButtonState=topcenter
ToolBoxButtonX=635
[Containments][1][Wallpaper][org.kde.image][General]
Image=file:///home/yannickschinko/Bilder/Nitrado Bildschirmhintergrund 2.jpg
SlidePaths=/usr/share/wallpapers
[Containments][10]
activityId=
formfactor=2
immutability=1
lastScreen=0
location=4
plugin=org.kde.plasma.private.systemtray
wallpaperplugin=org.kde.image
[Containments][10][Applets][11]
immutability=1
plugin=org.kde.plasma.printmanager
[Containments][10][Applets][12]
immutability=1
plugin=org.kde.plasma.manage-inputmethod
[Containments][10][Applets][13]
immutability=1
plugin=org.kde.plasma.volume
[Containments][10][Applets][14]
immutability=1
plugin=org.kde.plasma.notifications
[Containments][10][Applets][15]
immutability=1
plugin=org.kde.plasma.keyboardlayout
[Containments][10][Applets][16]
immutability=1
plugin=org.kde.plasma.vault
[Containments][10][Applets][17]
immutability=1
plugin=org.kde.plasma.nightcolorcontrol
[Containments][10][Applets][18]
immutability=1
plugin=org.kde.plasma.devicenotifier
[Containments][10][Applets][19]
immutability=1
plugin=org.kde.plasma.clipboard
[Containments][10][Applets][20]
immutability=1
plugin=org.kde.plasma.keyboardindicator
[Containments][10][Applets][23]
immutability=1
plugin=org.kde.plasma.battery
[Containments][10][Applets][24]
immutability=1
plugin=org.kde.plasma.networkmanagement
[Containments][10][General]
extraItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
knownItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
[Containments][2]
ItemGeometries-1440x2560=
ItemGeometriesVertical=
activityId=52fecab1-0316-44ae-a623-f1b817802be0
formfactor=0
immutability=1
lastScreen=6
location=0
plugin=org.kde.plasma.folder
wallpaperplugin=org.kde.image
[Containments][2][ConfigDialog]
DialogHeight=540
DialogWidth=720
[Containments][2][General]
ToolBoxButtonState=topcenter
ToolBoxButtonX=320
[Containments][2][Wallpaper][org.kde.image][General]
Image=file:///home/yannickschinko/Bilder/Nitrado Bildschirmhintergrund 2.jpg
SlidePaths=/usr/share/wallpapers
[Containments][3]
ItemGeometries-1920x1200=
ItemGeometriesHorizontal=
activityId=52fecab1-0316-44ae-a623-f1b817802be0
formfactor=0
immutability=1
lastScreen=5
location=0
plugin=org.kde.plasma.folder
wallpaperplugin=org.kde.image
[Containments][3][ConfigDialog]
DialogHeight=540
DialogWidth=720
[Containments][3][Wallpaper][org.kde.image][General]
Image=file:///home/yannickschinko/Bilder/Nitrado Bildschirmhintergrund 2.jpg
SlidePaths=/usr/share/wallpapers
[Containments][4]
activityId=
formfactor=2
immutability=1
lastScreen=0
location=4
plugin=org.kde.panel
wallpaperplugin=org.kde.image
[Containments][4][Applets][21]
immutability=1
plugin=org.kde.plasma.digitalclock
[Containments][4][Applets][22]
immutability=1
plugin=org.kde.plasma.showdesktop
[Containments][4][Applets][25]
immutability=1
plugin=org.kde.plasma.taskmanager
[Containments][4][Applets][5]
immutability=1
plugin=org.kde.plasma.kickoff
[Containments][4][Applets][5][Configuration][General]
favoritesPortedToKAstats=true
[Containments][4][Applets][5][Configuration][Shortcuts]
global=Alt+F1
[Containments][4][Applets][6]
immutability=1
plugin=org.kde.plasma.pager
[Containments][4][Applets][8]
immutability=1
plugin=org.kde.plasma.marginsseparator
[Containments][4][Applets][9]
immutability=1
plugin=org.kde.plasma.systemtray
[Containments][4][Applets][9][Configuration]
PreloadWeight=55
SystrayContainmentId=10
[Containments][4][General]
AppletOrder=5;25;6;8;9;21;22
[Containments][48]
activityId=
formfactor=2
immutability=1
lastScreen=5
location=4
plugin=org.kde.panel
wallpaperplugin=org.kde.image
[Containments][48][Applets][49]
immutability=1
plugin=org.kde.plasma.kickoff
[Containments][48][Applets][49][Configuration][General]
favoritesPortedToKAstats=true
[Containments][48][Applets][49][Configuration][Shortcuts]
global=Alt+F1
[Containments][48][Applets][50]
immutability=1
plugin=org.kde.plasma.pager
[Containments][48][Applets][52]
immutability=1
plugin=org.kde.plasma.marginsseparator
[Containments][48][Applets][53]
immutability=1
plugin=org.kde.plasma.systemtray
[Containments][48][Applets][53][Configuration]
PreloadWeight=55
SystrayContainmentId=54
[Containments][48][Applets][65]
immutability=1
plugin=org.kde.plasma.digitalclock
[Containments][48][Applets][66]
immutability=1
plugin=org.kde.plasma.showdesktop
[Containments][48][Applets][69]
immutability=1
plugin=org.kde.plasma.taskmanager
[Containments][48][General]
AppletOrder=49;69;50;52;53;65;66
[Containments][54]
activityId=
formfactor=2
immutability=1
lastScreen=5
location=4
plugin=org.kde.plasma.private.systemtray
wallpaperplugin=org.kde.image
[Containments][54][Applets][55]
immutability=1
plugin=org.kde.plasma.printmanager
[Containments][54][Applets][56]
immutability=1
plugin=org.kde.plasma.manage-inputmethod
[Containments][54][Applets][57]
immutability=1
plugin=org.kde.plasma.volume
[Containments][54][Applets][58]
immutability=1
plugin=org.kde.plasma.notifications
[Containments][54][Applets][59]
immutability=1
plugin=org.kde.plasma.keyboardlayout
[Containments][54][Applets][60]
immutability=1
plugin=org.kde.plasma.vault
[Containments][54][Applets][61]
immutability=1
plugin=org.kde.plasma.nightcolorcontrol
[Containments][54][Applets][62]
immutability=1
plugin=org.kde.plasma.devicenotifier
[Containments][54][Applets][63]
immutability=1
plugin=org.kde.plasma.clipboard
[Containments][54][Applets][64]
immutability=1
plugin=org.kde.plasma.keyboardindicator
[Containments][54][Applets][67]
immutability=1
plugin=org.kde.plasma.networkmanagement
[Containments][54][Applets][68]
immutability=1
plugin=org.kde.plasma.battery
[Containments][54][General]
extraItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
knownItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
Broken ~/.config/plasma-org.kde.plasma.desktop-appletsrc:
[ActionPlugins][0]
MiddleButton;NoModifier=org.kde.paste
RightButton;NoModifier=org.kde.contextmenu
wheel:Vertical;NoModifier=org.kde.switchdesktop
[ActionPlugins][1]
RightButton;NoModifier=org.kde.contextmenu
[Containments][1]
ItemGeometries-2560x1440=
ItemGeometriesHorizontal=
activityId=52fecab1-0316-44ae-a623-f1b817802be0
formfactor=0
immutability=1
lastScreen=0
location=0
plugin=org.kde.plasma.folder
wallpaperplugin=org.kde.image
[Containments][1][ConfigDialog]
DialogHeight=540
DialogWidth=720
[Containments][1][Wallpaper][org.kde.image][General]
Image=file:///home/yannickschinko/Bilder/Nitrado Bildschirmhintergrund 2.jpg
SlidePaths=/usr/share/wallpapers
[Containments][10]
activityId=
formfactor=2
immutability=1
lastScreen=0
location=4
plugin=org.kde.plasma.private.systemtray
wallpaperplugin=org.kde.image
[Containments][10][Applets][11]
immutability=1
plugin=org.kde.plasma.printmanager
[Containments][10][Applets][12]
immutability=1
plugin=org.kde.plasma.manage-inputmethod
[Containments][10][Applets][13]
immutability=1
plugin=org.kde.plasma.volume
[Containments][10][Applets][14]
immutability=1
plugin=org.kde.plasma.notifications
[Containments][10][Applets][15]
immutability=1
plugin=org.kde.plasma.keyboardlayout
[Containments][10][Applets][16]
immutability=1
plugin=org.kde.plasma.vault
[Containments][10][Applets][17]
immutability=1
plugin=org.kde.plasma.nightcolorcontrol
[Containments][10][Applets][18]
immutability=1
plugin=org.kde.plasma.devicenotifier
[Containments][10][Applets][19]
immutability=1
plugin=org.kde.plasma.clipboard
[Containments][10][Applets][20]
immutability=1
plugin=org.kde.plasma.keyboardindicator
[Containments][10][Applets][23]
immutability=1
plugin=org.kde.plasma.battery
[Containments][10][Applets][24]
immutability=1
plugin=org.kde.plasma.networkmanagement
[Containments][10][General]
extraItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
knownItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
[Containments][2]
ItemGeometries-1440x2560=
ItemGeometriesVertical=
activityId=52fecab1-0316-44ae-a623-f1b817802be0
formfactor=0
immutability=1
lastScreen=6
location=0
plugin=org.kde.plasma.folder
wallpaperplugin=org.kde.image
[Containments][2][ConfigDialog]
DialogHeight=540
DialogWidth=720
[Containments][2][General]
ToolBoxButtonState=topcenter
ToolBoxButtonX=320
[Containments][2][Wallpaper][org.kde.image][General]
Image=file:///home/yannickschinko/Bilder/Nitrado Bildschirmhintergrund 2.jpg
SlidePaths=/usr/share/wallpapers
[Containments][26]
activityId=
formfactor=2
immutability=1
lastScreen=6
location=4
plugin=org.kde.panel
wallpaperplugin=org.kde.image
[Containments][26][Applets][27]
immutability=1
plugin=org.kde.plasma.kickoff
[Containments][26][Applets][27][Configuration][General]
favoritesPortedToKAstats=true
[Containments][26][Applets][27][Configuration][Shortcuts]
global=Alt+F1
[Containments][26][Applets][28]
immutability=1
plugin=org.kde.plasma.pager
[Containments][26][Applets][30]
immutability=1
plugin=org.kde.plasma.marginsseparator
[Containments][26][Applets][31]
immutability=1
plugin=org.kde.plasma.systemtray
[Containments][26][Applets][31][Configuration]
PreloadWeight=55
SystrayContainmentId=32
[Containments][26][Applets][43]
immutability=1
plugin=org.kde.plasma.digitalclock
[Containments][26][Applets][44]
immutability=1
plugin=org.kde.plasma.showdesktop
[Containments][26][Applets][47]
immutability=1
plugin=org.kde.plasma.taskmanager
[Containments][26][ConfigDialog]
DialogHeight=84
DialogWidth=1440
[Containments][26][General]
AppletOrder=27;47;28;30;31;43;44
[Containments][3]
ItemGeometries-1920x1200=
ItemGeometriesHorizontal=
activityId=52fecab1-0316-44ae-a623-f1b817802be0
formfactor=0
immutability=1
lastScreen=5
location=0
plugin=org.kde.plasma.folder
wallpaperplugin=org.kde.image
[Containments][3][ConfigDialog]
DialogHeight=540
DialogWidth=720
[Containments][3][Wallpaper][org.kde.image][General]
Image=file:///home/yannickschinko/Bilder/Nitrado Bildschirmhintergrund 2.jpg
SlidePaths=/usr/share/wallpapers
[Containments][32]
activityId=
formfactor=2
immutability=1
lastScreen=6
location=4
plugin=org.kde.plasma.private.systemtray
wallpaperplugin=org.kde.image
[Containments][32][Applets][33]
immutability=1
plugin=org.kde.plasma.printmanager
[Containments][32][Applets][34]
immutability=1
plugin=org.kde.plasma.manage-inputmethod
[Containments][32][Applets][35]
immutability=1
plugin=org.kde.plasma.volume
[Containments][32][Applets][36]
immutability=1
plugin=org.kde.plasma.notifications
[Containments][32][Applets][37]
immutability=1
plugin=org.kde.plasma.keyboardlayout
[Containments][32][Applets][38]
immutability=1
plugin=org.kde.plasma.vault
[Containments][32][Applets][39]
immutability=1
plugin=org.kde.plasma.nightcolorcontrol
[Containments][32][Applets][40]
immutability=1
plugin=org.kde.plasma.devicenotifier
[Containments][32][Applets][41]
immutability=1
plugin=org.kde.plasma.clipboard
[Containments][32][Applets][42]
immutability=1
plugin=org.kde.plasma.keyboardindicator
[Containments][32][Applets][45]
immutability=1
plugin=org.kde.plasma.networkmanagement
[Containments][32][Applets][46]
immutability=1
plugin=org.kde.plasma.battery
[Containments][32][General]
extraItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
knownItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
[Containments][4]
activityId=
formfactor=2
immutability=1
lastScreen=0
location=4
plugin=org.kde.panel
wallpaperplugin=org.kde.image
[Containments][4][Applets][21]
immutability=1
plugin=org.kde.plasma.digitalclock
[Containments][4][Applets][22]
immutability=1
plugin=org.kde.plasma.showdesktop
[Containments][4][Applets][25]
immutability=1
plugin=org.kde.plasma.taskmanager
[Containments][4][Applets][5]
immutability=1
plugin=org.kde.plasma.kickoff
[Containments][4][Applets][5][Configuration][General]
favoritesPortedToKAstats=true
[Containments][4][Applets][5][Configuration][Shortcuts]
global=Alt+F1
[Containments][4][Applets][6]
immutability=1
plugin=org.kde.plasma.pager
[Containments][4][Applets][8]
immutability=1
plugin=org.kde.plasma.marginsseparator
[Containments][4][Applets][9]
immutability=1
plugin=org.kde.plasma.systemtray
[Containments][4][Applets][9][Configuration]
PreloadWeight=55
SystrayContainmentId=10
[Containments][4][General]
AppletOrder=5;25;6;8;9;21;22
[Containments][48]
activityId=
formfactor=2
immutability=1
lastScreen=5
location=4
plugin=org.kde.panel
wallpaperplugin=org.kde.image
[Containments][48][Applets][49]
immutability=1
plugin=org.kde.plasma.kickoff
[Containments][48][Applets][49][Configuration][General]
favoritesPortedToKAstats=true
[Containments][48][Applets][49][Configuration][Shortcuts]
global=Alt+F1
[Containments][48][Applets][50]
immutability=1
plugin=org.kde.plasma.pager
[Containments][48][Applets][52]
immutability=1
plugin=org.kde.plasma.marginsseparator
[Containments][48][Applets][53]
immutability=1
plugin=org.kde.plasma.systemtray
[Containments][48][Applets][53][Configuration]
PreloadWeight=55
SystrayContainmentId=54
[Containments][48][Applets][65]
immutability=1
plugin=org.kde.plasma.digitalclock
[Containments][48][Applets][66]
immutability=1
plugin=org.kde.plasma.showdesktop
[Containments][48][Applets][69]
immutability=1
plugin=org.kde.plasma.taskmanager
[Containments][48][General]
AppletOrder=49;69;50;52;53;65;66
[Containments][54]
activityId=
formfactor=2
immutability=1
lastScreen=5
location=4
plugin=org.kde.plasma.private.systemtray
wallpaperplugin=org.kde.image
[Containments][54][Applets][55]
immutability=1
plugin=org.kde.plasma.printmanager
[Containments][54][Applets][56]
immutability=1
plugin=org.kde.plasma.manage-inputmethod
[Containments][54][Applets][57]
immutability=1
plugin=org.kde.plasma.volume
[Containments][54][Applets][58]
immutability=1
plugin=org.kde.plasma.notifications
[Containments][54][Applets][59]
immutability=1
plugin=org.kde.plasma.keyboardlayout
[Containments][54][Applets][60]
immutability=1
plugin=org.kde.plasma.vault
[Containments][54][Applets][61]
immutability=1
plugin=org.kde.plasma.nightcolorcontrol
[Containments][54][Applets][62]
immutability=1
plugin=org.kde.plasma.devicenotifier
[Containments][54][Applets][63]
immutability=1
plugin=org.kde.plasma.clipboard
[Containments][54][Applets][64]
immutability=1
plugin=org.kde.plasma.keyboardindicator
[Containments][54][Applets][67]
immutability=1
plugin=org.kde.plasma.networkmanagement
[Containments][54][Applets][68]
immutability=1
plugin=org.kde.plasma.battery
[Containments][54][General]
extraItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
knownItems=org.kde.plasma.printmanager,org.kde.plasma.manage-inputmethod,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.plasma.mediacontroller,org.kde.plasma.notifications,org.kde.plasma.keyboardlayout,org.kde.plasma.vault,org.kde.plasma.nightcolorcontrol,org.kde.plasma.battery,org.kde.plasma.devicenotifier,org.kde.plasma.networkmanagement,org.kde.plasma.clipboard,org.kde.plasma.keyboardindicator
System info:
Operating System: Fedora Linux 35
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.2
Kernel Version: 6.0.12-100.fc35.x86_64 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 15.2 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: LENOVO
Product Name: 20N2004AGE
System Version: ThinkPad T490
I’m very aware that Fedora 35 is EOL, however I currently cannot upgrade. Also this issue existed before it went EOL.