Created attachment 169224 [details] This image shows the SDDM background chooser without a choose file button. SUMMARY I cannot change the sddm background. STEPS TO REPRODUCE 1. Go to the main system settings application. 2. Go to the "Login Screen (SDDM)" section. 3. Click on the change background button for a SDDM theme. OBSERVED RESULT First the window becomes somewhat unresponsive then after several mouse clicks of key presses within the window, the background picture popup appears, but it lacks the choose file button. EXPECTED RESULT The background picture popup should appear immediately with a choose file button at the bottom. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Kubuntu 24.04 LTS (available in About System) KDE Plasma Version: 5.27.11 KDE Frameworks Version: 5.115.0 Qt Version: 5.15.13 ADDITIONAL INFORMATION
Just to rule out the effect of any visual or functional customizations you've made, does the issue reproduce in a new clean user account?
No the problem persists in a new user with default settings, and themes.
Ok. Unfortunately (or fortunately?) I can't reproduce it myself in Plasma 6.0, and at this point 5.27 is out of support from KDE itself. So it's a "ask Kubuntu to investigate and fix it" situation. Ideally they have people capable of doing this, thereby giving that "LTS" branding meaning.