--- texmaker.cpp.orig	2021-08-14 10:59:31.084359247 -0400

+++ texmaker.cpp	2021-08-14 11:01:06.030573621 -0400

@@ -5234,28 +5234,10 @@

 metapost_command=config->value("Tools/Metapost","mpost --interaction nonstopmode ").toString();

 // xdvi %.dvi  -sourceposition @:%.tex

 // kdvi "file:%.dvi#src:@ %.tex"

-switch (desktop_env)

-	{

-	case 1:

-		{

-		viewdvi_command=config->value("Tools/Dvi","evince %.dvi").toString();

-		viewps_command=config->value("Tools/Ps","evince %.ps").toString();

-		viewpdf_command=config->value("Tools/Pdf","evince %.pdf").toString();

-		}break;

-	case 2:

-		{

-		viewdvi_command=config->value("Tools/Dvi","kdvi %.dvi").toString();

-		viewps_command=config->value("Tools/Ps","kghostview %.ps").toString();

-		viewpdf_command=config->value("Tools/Pdf","kpdf %.pdf").toString();

-		}break;

-	case 3:

-		{

-		viewdvi_command=config->value("Tools/Dvi","okular %.dvi").toString();

-		viewps_command=config->value("Tools/Ps","okular %.ps").toString();

-		viewpdf_command=config->value("Tools/Pdf","okular %.pdf").toString();

-		}break;

-	}

+viewdvi_command=config->value("Tools/Dvi","xdg-open %.dvi").toString();

+viewps_command=config->value("Tools/Ps","xdg-open %.ps").toString();

+viewpdf_command=config->value("Tools/Pdf","xdg-open %.pdf").toString();

 ghostscript_command=config->value("Tools/Ghostscript","gs").toString();