SUMMARY I use archlinux, since plasma 5.17.0 I notice that after plasma has booted the panel doesn't appear immediately, the wallpaper and icons on desktop appear first, and the panel appears only after a delay of 5 seconds, this weird delay doesn't occur with the previous versions of plasma, I use hard disk (not SSD), STEPS TO REPRODUCE 1. Install plasma 5.17.0 OBSERVED RESULT - At cold boot you will notice that the panel is the last element to appear, after a long delay of 5 seconds - With the previous version this latency doesn't exist for the panel EXPECTED RESULT The panel should appear quickly after the boot, shortly after the display of desktop, SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: archlinux 64 bits, plasma 5.17.0 (available in About System) KDE Plasma Version: 5.17.0 KDE Frameworks Version: 5.63.0 Qt Version: 5.13.1
I'm also experiencing this delay... Two hardware identical machines (apart from storage drives), both running: Operating System: openSUSE Tumbleweed 20191016 KDE Plasma Version: 5.17.0 KDE Frameworks Version: 5.63.0 Qt Version: 5.13.1 Kernel Version: 5.3.5-1-default One machine has an HDD, the delay I'm seeing is similar to the OP, approx 4-5 seconds. The other machine has an SSD, the delay is considerably less, but nonetheless still noticeable.
I can confirm this issue specially when I have widgets placed on desktop. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.17.90 KDE Frameworks Version: 5.66.0 Qt Version: 5.14.1
Turns out all I had to do was clear the clipboard history.. Right click the klipper copy/paste manager icon and clear history. I wrote a page about this if you care to know how I stumbled across this. https://jordanpetersontech.wordpress.com/2022/11/18/solved-kde-desktop-plasma-panel-slow-to-load/
We can either make the panel appear quickly and load its contents later, or we can delay its appearance until it's ready, but we can't do both; see Bug 447476. If this was about the Panel generally loading slowly, is anyone still able to reproduce it in Plasma 5.27?
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!