I made an installation without DE, installing a WM.
nemo, pluma and pasystray don't have icons.
I have world/adwaita-icon-theme installed.
I recently had some similar issue on my laptop with xfce DE.
I had both no icons and my screensaver was black (floating xue would not appear) and xfce4-screensaver would throw some pango error.
Turns out it was my own stupidity, it was because of either LD_LIBRARY_PATH specified in my shell .rc or library paths /etc/ld.so.conf.
I removed all mentions of LD_LIBRARY_PATH and ld.so.conf, reinstalled every package and icons and screensaver appeared back.
pasystray no icon empty space in the tray.
nemo and pluma have some fallback icons.
How do I check if icons are set correctly?
neofetch didn't show any icon theme I set one with lxappearance-gtk3 and now it shows `Icons: Adwaita [GTK2/3]` but no icon.