Thank you for the tip, sal_vager, but in Ubuntu 16.04 Linux, the command associated with the desktop configuration file for KSP is "steam steam://rungameid/220200," and appending "-force-glcore" to the end of the command line seems to have no effect. Any suggestion for running this steam program from a terminal command would be appreciated. This invisible text problem is ruining the KSP experience for more than a few folks here.