Description: If libreoffice is started on a dual-head box, this fails with: Xlib: extension "XINERAMA" missing on display ":0". LibreOffice 7.2 - Fatal Error: The application cannot be started. User installation could not be completed. Steps to Reproduce: 1. startx which opens, among other things, some xterm 2. libreoffice Actual Results: see above Expected Results: libreoffice should start Reproducible: Always User Profile Reset: Yes OpenGL enabled: Yes Additional Info: From glxinfo: OpenGL vendor string: X.Org OpenGL renderer string: AMD CEDAR (DRM 2.50.0 / 13.0-RELEASE-p4, LLVM 12.0.1) OpenGL core profile version string: 3.3 (Core Profile) Mesa 21.1.8 from xrandr: Screen 0: minimum 320 x 200, current 3200 x 1200, maximum 8192 x 8192 HDMI-1 connected primary 1600x1200+0+0 (normal left inverted right x axis y axis) 367mm x 275mm [...] DVI-D-1 connected 1600x1200+1600+0 (normal left inverted right x axis y axis) 367mm x 275mm