SUMMARY On login, ~/.config/gtkrc-2.0 is overwritten with: # created by KDE Plasma, Mon Feb 11 20:50:57 2019 # # If you do not want Plasma to override your GTK settings, select # Colors in the System Settings and disable the checkbox # "Apply colors to non-Qt applications" # # gtk-alternative-button-order = 1 I have disabled the checkbox but it continues overwriting the file anyway. bug#325736 seems to be related. Text comes from here: https://github.com/KDE/plasma-desktop/blob/ccc6e24f9aab3da40f0ff2ba7b505022b485ed0e/kcms/krdb/krdb.cpp#L269 STEPS TO REPRODUCE 1. change contents of ~/.config/gtkrc-2.0 2. log out & log in 3. open file and note changed contents SOFTWARE/OS VERSIONS Arch Linux Plasma: 5.14.5 Frameworks: 5.54.0 Qt: 5.12.1
Possibly related: it also creates an empty file at ~/.gtkrc-2.0 on login.
Essentially the same issue and root cause as Bug 421240; let's track the solution there. *** This bug has been marked as a duplicate of bug 421240 ***