Created attachment 732479 [details] backtrace and terminal output from 3 attempts I did some tests as suggested: First 3 tests see attachment (LO-debugging.txt) with output from gdb and console. Then I tried the trick with SAL.. (I am not sure if this is how it is meant to be): > export SAL_USE_VCLPLUGIN="gen lowriter" > /usr/lib64/libreoffice/program/soffice.bin X Error: BadMatch (invalid parameter attributes) 8 Major opcode: 42 (X_SetInputFocus) Resource id: 0x620008f X Error: BadMatch (invalid parameter attributes) 8 Major opcode: 42 (X_SetInputFocus) Resource id: 0x620008f Speicherzugriffsfehler (Speicherabzug geschrieben) > export SAL_USE_VCLPLUGIN=gen lowriter > /usr/lib64/libreoffice/program/soffice.bin Speicherzugriffsfehler (Speicherabzug geschrieben) > export SAL_USE_VCLPLUGIN=gen_lowriter > /usr/lib64/libreoffice/program/soffice.bin X Error: BadMatch (invalid parameter attributes) 8 Major opcode: 42 (X_SetInputFocus) Resource id: 0x6200089 Speicherzugriffsfehler (Speicherabzug geschrieben) Finally I deinstalled libreoffice-kde4 and moved .libreoffice and .config/libreoffice to other locations: This seems to work, however with a bare-bones interface from the 1990ies (I just opened one doc and closed it again without crashing). Then I restored the two .-folders. Result: LO crashes again: > /usr/lib64/libreoffice/program/soffice.bin Speicherzugriffsfehler (Speicherabzug geschrieben) Now I get a different result in gdb (will be another attachment). Also something with "sal" ...