QCKVU Linux may crash upon startup when some of the motif/X font settings end with a colon in them. A typical warning when you start Qckvu is:Warning: Missing charsets in String to FontSet conversion Warning: Cannot convert string "-dt-interface system-medium-r-normal-l*-*-*-*-*-*-*-*-*" to type FontSet Warning: Missing charsets in String to FontSet conversion Warning: Unable to load any usable fontset Warning: Name: FONTLIST_DEFAULT_TAG_STRING Class: XmRendition Conversion failed. Cannot load font. Warning: Name: FONTLIST_DEFAULT_TAG_STRING Class: XmRendition Conversion failed. Cannot load font. Warning: Missing charsets in String to FontSet conversion Here is the solution for this problem. 1. Save the original X setting by making a copy of the following files: copy xrdb -query to X_font_orig copy xrdb -query to X_font_mod 2. Edit X_font_mod. motif/X does not not like font settings ending with a colon in them. The two typical settings that are causing the crashes are: *XmText*FontList: -dt-interface user-medium-r-normal-m*-*-*-*-*-*-*-*-*: *XmTextField*FontList: -dt-interface user-medium-r-normal-m*-*-*-*-*-*-*-*-*: If the colon on the end of the font is removed, then there is no crash. 3. After editing run... xrdb -load X_font_mod This enables the new Xfonts to apply to this system/host 4. If you want to go back to your original settings type... xrdb X_font_orig |