SUMMARY I have a GTK3 program, where I wanted to set a symbolic weather icon somewhere. What happened is instead I got a white square in its place. I have made a small program to test every single icon, and I got a full list of which does show up that way. I also tested papirus icons, to see if it is some common feature that is missing from GTK3, but there was no icons there to show up this way. The icons work in GTK4, however. STEPS TO REPRODUCE 1. Open an app designer app, like Glade 2. Make a design 3. Add a GTKWindow 4. Add a GTKImage to it 5. Set the icon name property to weather-clear-night-symbolic OBSERVED RESULT The icon shows up as a white rectangle EXPECTED RESULT That the icon displays correctly, as many others SOFTWARE/OS VERSIONS Operating System: Artix Linux KDE Plasma Version: 6.3.5 KDE Frameworks Version: 6.14.0 Qt Version: 6.9.0 Kernel Version: 6.14.6-artix1-1 (64-bit) Graphics Platform: Wayland Processors: 12 × 11th Gen Intel® Core™ i5-11400F @ 2.60GHz Memory: 15.5 GiB of RAM Graphics Processor: AMD Radeon RX 6600 XT Manufacturer: ASUS ADDITIONAL INFORMATION One more thing to mention is some show up as 16x16, some as 22x22. some as 32x32. The whole list of icons, that show up this way (ignore the number on the end of them and .png, those are artifacts from the app rendering them): ``` akonadi-symbolic1006.png kleopatra-symbolic785.png preferences-system-bluetooth-activated-symbolic659.png weather-freezing-rain-night-symbolic1076.png weather-showers-scattered-symbolic851.png akonadi-symbolic1029.png kleopatra-symbolic987.png preferences-system-bluetooth-activated-symbolic894.png weather-freezing-rain-night-symbolic829.png weather-showers-symbolic1079.png akonadi-symbolic737.png klipper-symbolic1004.png preferences-system-bluetooth-activated-symbolic899.png weather-freezing-rain-symbolic1095.png weather-showers-symbolic472.png akonadi-symbolic759.png klipper-symbolic1060.png preferences-system-bluetooth-activated-symbolic906.png weather-freezing-rain-symbolic848.png weather-showers-symbolic832.png akonadi-symbolic782.png klipper-symbolic1063.png preferences-system-bluetooth-battery-symbolic653.png weather-freezing-scattered-rain-day-symbolic1117.png weather-snow-day-symbolic1111.png akonadi-symbolic984.png klipper-symbolic757.png preferences-system-bluetooth-battery-symbolic900.png weather-freezing-scattered-rain-day-symbolic870.png weather-snow-day-symbolic864.png amarok-symbolic1008.png klipper-symbolic813.png preferences-system-bluetooth-inactive-symbolic650.png weather-freezing-scattered-rain-night-symbolic1116.png weather-snow-night-symbolic1088.png amarok-symbolic1035.png klipper-symbolic816.png preferences-system-bluetooth-inactive-symbolic897.png weather-freezing-scattered-rain-night-symbolic869.png weather-snow-night-symbolic841.png amarok-symbolic743.png kmail-symbolic1024.png vlc-symbolic1013.png weather-freezing-scattered-rain-storm-day-symbolic1114.png weather-snow-rain-symbolic1107.png amarok-symbolic761.png kmail-symbolic732.png vlc-symbolic721.png weather-freezing-scattered-rain-storm-day-symbolic867.png weather-snow-rain-symbolic860.png amarok-symbolic788.png kmail-symbolic777.png vlc-symbolic766.png weather-freezing-scattered-rain-storm-night-symbolic1069.png weather-snow-scattered-day-symbolic1073.png amarok-symbolic990.png kmail-symbolic979.png vlc-symbolic968.png weather-freezing-scattered-rain-storm-night-symbolic822.png weather-snow-scattered-day-symbolic826.png cantata-symbolic1011.png konversation-symbolic1042.png weather-clear-night-symbolic1085.png weather-freezing-scattered-rain-storm-symbolic1080.png weather-snow-scattered-night-symbolic1109.png cantata-symbolic1039.png konversation-symbolic749.png weather-clear-night-symbolic502.png weather-freezing-scattered-rain-storm-symbolic833.png weather-snow-scattered-night-symbolic862.png cantata-symbolic746.png konversation-symbolic795.png weather-clear-night-symbolic838.png weather-freezing-scattered-rain-symbolic1092.png weather-snow-scattered-storm-day-symbolic1118.png cantata-symbolic764.png konversation-symbolic996.png weather-clear-symbolic1071.png weather-freezing-scattered-rain-symbolic845.png weather-snow-scattered-storm-day-symbolic871.png cantata-symbolic792.png kopete-symbolic1022.png weather-clear-symbolic431.png weather-freezing-storm-day-symbolic1099.png weather-snow-scattered-storm-night-symbolic1100.png cantata-symbolic993.png kopete-symbolic730.png weather-clear-symbolic824.png weather-freezing-storm-day-symbolic852.png weather-snow-scattered-storm-night-symbolic853.png input-mouse-battery-symbolic1052.png kopete-symbolic775.png weather-clear-wind-night-symbolic1067.png weather-freezing-storm-night-symbolic1087.png weather-snow-scattered-storm-symbolic1081.png input-mouse-battery-symbolic805.png kopete-symbolic977.png weather-clear-wind-night-symbolic820.png weather-freezing-storm-night-symbolic840.png weather-snow-scattered-storm-symbolic834.png kalarm-symbolic1031.png korgac-symbolic1017.png weather-clear-wind-symbolic1075.png weather-freezing-storm-symbolic1086.png weather-snow-scattered-symbolic1113.png kalarm-symbolic739.png korgac-symbolic725.png weather-clear-wind-symbolic828.png weather-freezing-storm-symbolic839.png weather-snow-scattered-symbolic866.png kalarm-symbolic784.png korgac-symbolic770.png weather-clouds-night-symbolic1072.png weather-hail-symbolic1066.png weather-snow-storm-day-symbolic1089.png kalarm-symbolic986.png korgac-symbolic972.png weather-clouds-night-symbolic825.png weather-hail-symbolic819.png weather-snow-storm-day-symbolic842.png kdeconnect-symbolic1001.png kruler-symbolic1019.png weather-clouds-symbolic1105.png weather-many-clouds-wind-symbolic1101.png weather-snow-storm-night-symbolic1074.png kdeconnect-symbolic1015.png kruler-symbolic727.png weather-clouds-symbolic858.png weather-many-clouds-wind-symbolic854.png weather-snow-storm-night-symbolic827.png kdeconnect-symbolic714.png kruler-symbolic772.png weather-clouds-wind-night-symbolic1090.png weather-showers-day-symbolic1078.png weather-snow-storm-symbolic1083.png kdeconnect-symbolic723.png kruler-symbolic974.png weather-clouds-wind-night-symbolic843.png weather-showers-day-symbolic831.png weather-snow-storm-symbolic836.png kdeconnect-symbolic754.png ktorrent-symbolic1033.png weather-clouds-wind-symbolic1093.png weather-showers-night-symbolic1112.png weather-snow-symbolic1119.png kdeconnect-symbolic768.png ktorrent-symbolic741.png weather-clouds-wind-symbolic846.png weather-showers-night-symbolic865.png weather-snow-symbolic625.png kdeconnect-symbolic961.png ktorrent-symbolic786.png weather-few-clouds-night-symbolic1102.png weather-showers-scattered-day-symbolic1070.png weather-snow-symbolic872.png kdeconnect-symbolic970.png ktorrent-symbolic988.png weather-few-clouds-night-symbolic542.png weather-showers-scattered-day-symbolic823.png weather-storm-day-symbolic1068.png kget-symbolic1021.png kup-symbolic1016.png weather-few-clouds-night-symbolic855.png weather-showers-scattered-night-symbolic1104.png weather-storm-day-symbolic821.png kget-symbolic729.png kup-symbolic724.png weather-few-clouds-symbolic1108.png weather-showers-scattered-night-symbolic857.png weather-storm-night-symbolic1097.png kget-symbolic774.png kup-symbolic769.png weather-few-clouds-symbolic573.png weather-showers-scattered-storm-day-symbolic1084.png weather-storm-night-symbolic850.png kget-symbolic976.png kup-symbolic971.png weather-few-clouds-symbolic861.png weather-showers-scattered-storm-day-symbolic837.png weather-storm-symbolic1077.png kgpg-symbolic1040.png network-bluetooth-inactive-symbolic1062.png weather-few-clouds-wind-night-symbolic1094.png weather-showers-scattered-storm-night-symbolic1115.png weather-storm-symbolic451.png kgpg-symbolic747.png network-bluetooth-inactive-symbolic1065.png weather-few-clouds-wind-night-symbolic847.png weather-showers-scattered-storm-night-symbolic868.png weather-storm-symbolic830.png kgpg-symbolic793.png network-bluetooth-inactive-symbolic815.png weather-few-clouds-wind-symbolic1096.png weather-showers-scattered-storm-symbolic1082.png kgpg-symbolic994.png network-bluetooth-inactive-symbolic818.png weather-few-clouds-wind-symbolic849.png weather-showers-scattered-storm-symbolic835.png kleopatra-symbolic1032.png preferences-system-bluetooth-activated-symbolic647.png weather-freezing-rain-day-symbolic1103.png weather-showers-scattered-symbolic1098.png kleopatra-symbolic740.png preferences-system-bluetooth-activated-symbolic652.png weather-freezing-rain-day-symbolic856.png weather-showers-scattered-symbolic526.png ```
GTK apps still support XDG icon theming, so if you're not seeing the icons you expect appear in these apps, then the problem is that the environment where the app is running isn't using the Breeze icon theme, and the icon theme it is using doesn't fall back to Breeze, and because the GTK icon loader is being used, it will try to fall back to Adwaita (which doesn't have these icons) rather than Breeze as its final fallback before looking in hicolor (which also won't have these icons).
I have rendered every single Breeze symbolic icon, all are used, and the environment is just KDE Plasma, with Breeze icons selected and KDE GTK configurator also set to Breeze. And no, GTK falls back to gtk-missing-image, not a white filled square
Then somehow the app is still failing to actually use Breeze as its icon theme. I'm not familiar enough with GTK to tell you specifically where to look next, but this isn't a problem in the Breeze icon theme.
The problem is GTK rendering this: ``` <rect y="0" x="0" height="22" width="22" id="rect4193" style="opacity:1;fill:none;fill-opacity:1;stroke:none;stroke-width:0.1;stroke-linecap:square;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"/> ```
Per https://invent.kde.org/frameworks/breeze-icons/-/merge_requests/473, it deems that this is indeed a GTK 3 bug that was fixed in GTK 4, but we're triggering it due to some unnecessary rectangles in these icons.
Git commit 5d0a6f1e0cbc8c378bd781326564ea2cfbfcea9f by Nate Graham, on behalf of Mors Mortium. Committed on 29/05/2025 at 14:10. Pushed by ngraham into branch 'master'. Removeinvisible rectangles These were invisible and so completely useless, but they triggered a bug in GTK 3 that caused them to be rendered anyway and break the icons. FIXED-IN: 6.15 M +0 -1 icons/applets/48/weather-clear-night-symbolic.svg M +0 -1 icons/applets/48/weather-clear-symbolic.svg M +0 -1 icons/applets/48/weather-clear-wind-night-symbolic.svg M +0 -1 icons/applets/48/weather-clear-wind-symbolic.svg M +0 -1 icons/applets/48/weather-clouds-night-symbolic.svg M +0 -1 icons/applets/48/weather-clouds-symbolic.svg M +0 -1 icons/applets/48/weather-clouds-wind-night-symbolic.svg M +0 -1 icons/applets/48/weather-clouds-wind-symbolic.svg M +0 -1 icons/applets/48/weather-few-clouds-night-symbolic.svg M +0 -1 icons/applets/48/weather-few-clouds-symbolic.svg M +0 -1 icons/applets/48/weather-few-clouds-wind-night-symbolic.svg M +0 -1 icons/applets/48/weather-few-clouds-wind-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-rain-day-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-rain-night-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-rain-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-scattered-rain-day-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-scattered-rain-night-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-scattered-rain-storm-day-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-scattered-rain-storm-night-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-scattered-rain-storm-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-scattered-rain-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-storm-day-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-storm-night-symbolic.svg M +0 -1 icons/applets/48/weather-freezing-storm-symbolic.svg M +0 -1 icons/applets/48/weather-hail-symbolic.svg M +0 -1 icons/applets/48/weather-many-clouds-wind-symbolic.svg M +0 -1 icons/applets/48/weather-showers-day-symbolic.svg M +0 -1 icons/applets/48/weather-showers-night-symbolic.svg M +0 -1 icons/applets/48/weather-showers-scattered-day-symbolic.svg M +0 -1 icons/applets/48/weather-showers-scattered-night-symbolic.svg M +0 -1 icons/applets/48/weather-showers-scattered-storm-day-symbolic.svg M +0 -1 icons/applets/48/weather-showers-scattered-storm-night-symbolic.svg M +0 -1 icons/applets/48/weather-showers-scattered-storm-symbolic.svg M +0 -1 icons/applets/48/weather-showers-scattered-symbolic.svg M +0 -1 icons/applets/48/weather-showers-symbolic.svg M +0 -1 icons/applets/48/weather-snow-day-symbolic.svg M +0 -1 icons/applets/48/weather-snow-night-symbolic.svg M +0 -2 icons/applets/48/weather-snow-rain-symbolic.svg M +0 -1 icons/applets/48/weather-snow-scattered-day-symbolic.svg M +0 -1 icons/applets/48/weather-snow-scattered-night-symbolic.svg M +0 -1 icons/applets/48/weather-snow-scattered-storm-day-symbolic.svg M +0 -1 icons/applets/48/weather-snow-scattered-storm-night-symbolic.svg M +0 -1 icons/applets/48/weather-snow-scattered-storm-symbolic.svg M +0 -1 icons/applets/48/weather-snow-scattered-symbolic.svg M +0 -1 icons/applets/48/weather-snow-storm-day-symbolic.svg M +0 -1 icons/applets/48/weather-snow-storm-night-symbolic.svg M +0 -1 icons/applets/48/weather-snow-storm-symbolic.svg M +0 -1 icons/applets/48/weather-snow-symbolic.svg M +0 -1 icons/applets/48/weather-storm-day-symbolic.svg M +0 -1 icons/applets/48/weather-storm-night-symbolic.svg M +0 -1 icons/applets/48/weather-storm-symbolic.svg M +0 -7 icons/apps/16/kdeconnect-symbolic.svg M +0 -1 icons/apps/22/akonadi-symbolic.svg M +0 -1 icons/apps/22/amarok-symbolic.svg M +0 -1 icons/apps/22/cantata-symbolic.svg M +0 -1 icons/apps/22/kalarm-symbolic.svg M +0 -7 icons/apps/22/kget-symbolic.svg M +0 -1 icons/apps/22/kgpg-symbolic.svg M +0 -7 icons/apps/22/kleopatra-symbolic.svg M +0 -1 icons/apps/22/kmail-symbolic.svg M +0 -7 icons/apps/22/konversation-symbolic.svg M +0 -1 icons/apps/22/kopete-symbolic.svg M +0 -1 icons/apps/22/korgac-symbolic.svg M +0 -1 icons/apps/22/kruler-symbolic.svg M +0 -1 icons/apps/22/ktorrent-symbolic.svg M +0 -3 icons/apps/22/kup-symbolic.svg M +0 -8 icons/apps/22/vlc-symbolic.svg M +0 -1 icons/apps/32/akonadi-symbolic.svg M +0 -1 icons/apps/32/amarok-symbolic.svg M +0 -1 icons/apps/32/cantata-symbolic.svg M +0 -1 icons/apps/32/klipper-symbolic.svg M +0 -1 icons/devices/32/input-mouse-battery-symbolic.svg M +0 -1 icons/preferences/22/preferences-system-bluetooth-activated-symbolic.svg M +0 -1 icons/preferences/32/preferences-system-bluetooth-activated-symbolic.svg M +0 -1 icons/preferences/32/preferences-system-bluetooth-battery-symbolic.svg M +0 -1 icons/preferences/32/preferences-system-bluetooth-inactive-symbolic.svg M +0 -1 icons/status/22/klipper-symbolic.svg M +0 -1 icons/status/22/network-bluetooth-inactive-symbolic.svg https://invent.kde.org/frameworks/breeze-icons/-/commit/5d0a6f1e0cbc8c378bd781326564ea2cfbfcea9f