https://bugzilla.gnome.org/show_bug.cgi?id=760876 seems very similar, except that the reversed text is just perfectly vertically mirrored, not also garbled like mine.
https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 760876 seems very similar, except that the reversed text is just perfectly vertically mirrored, not also garbled like mine.