Created attachment 167290 [details] display problems screenshot SUMMARY On our KDE Plasma 5 (KDEP5) personal computers (PCs) icons no longer display on toolbars nor for preset/'places' (just custom) Dolphin entries/files/directories/folders--see screenshot--and a Konsole display problem (you can see but I should report separately next) is cursor & selection are offset from actual text location. STEPS TO REPRODUCE 1. Run standard programs like Konsole, Dolphin, KATE. 2. Edit toolbars to set 'text under icons' (or any icons). 3. Look for error/missing display aspects. OBSERVED RESULT There are no icons (screenshot Dolphin directory/folder shown is symbolic link to user-owned /user/share/doc normally showing all as directory/folder icons) with exception of Dolphin custom-icon entries/files/directories/folders. You can also see on Konsole (I don't use toolbars but tested and no longer have icons) a display problem is cursor & selection are offset from actual text position... in screenshot Konsole I didn't press spaces, but initially and when I type, cursor is at least a tab's length past actual text location, and when I select text, highlighted range is similarly offset (confusing/impossible to copy correctly). All this persists on updates & reboots, though seemingly-universal display problem is no standard icons; I should report Konsole text display problem separately. EXPECTED RESULT Display normally (icons). SOFTWARE/OS VERSIONS UNIX/GNU/Linux/KDE Plasma: GNU/Linux Mint 21.3 (XFCE variant) KDE Plasma Version: 5.24.7 KDE Frameworks Version: 5.92.0 Qt Version: 5.15.3 HARDWARE SSD: OS (after KDE Neon 6, quick-formatted for GNU/Linux Mint 21.3) HDD: /home (kept from KDE Neon 6 but deleted KDE configuration) ADDITIONAL INFORMATION We had KDE Neon 6 which critically broke on 2/3 our family PCs (one unusable) and someone on Libera IRC #kde said Neon is 'almost rolling release' so we switched back to Mint with same /home hard disc drives (HDDs). I deleted ~/.kde , KDE files/directories/folders in ~/.config , ~/.local/share , and was extremely thorough (think I got all not starting with k)--deleted much I didn't need to--only stuff I know is left. We prefer Oxygen (detailed desktop-oriented) over Breeze (over-simple/-dull pad/tab(let)-oriented) and use other themes (GTK Clearlooks* & Greybird*) for specific settings (colours, icons/widgets) so don't know avoiding Breeze has to do with this... where Breeze is better for things (like newer startup/loading screen style) we occasionally use it. There's a small chance I missed deleting some configuration and--since reinstall apparently 'quick formatted'--small chance some package/theme data was leftover on OS' solid state drives (SSD)... wondering if we need to zero SSDs or delete more configuration...
Note, when I say only Dolphin custom-icon entries/files/directories/folders display, I don't mean chosen from KDE's available (I did some but they don't display) rather than only images/icons that have previews or I manually added such as to /usr/share/pixmaps (such as you can see Mount Olympus in my Dolphin information panel was the last image I hovered over, and similarly, only directories/folders I added my own images for custom icons display those as icons, you can see in the folders panel).
Looking at the screenshot, this is clearly an integration problem. Perhaps you're missing plasma-integration, or perhaps you're using qt5ct (which shouldn't be used). Maybe you're missing breeze-icons. Could be any number of things. But seems that you've assembled your system from bits and pieces, which means you're responsible for making sure all the integration gets done properly. Good luck! If fixing this proves impossible, I'd recommend using a KDE-focused distro whose job is to do all this work for you. If you've soured on Neon, some other good options are Fedora KDE and Kubuntu.
Problem was qt5ct, not 'assembling our systems from bits and pieces'--GNU/Linux Mint isn't Linux From Scratch.