diff -uNr gl4es/src/glx/glx.c gl4es.mod/src/glx/glx.c
--- gl4es/src/glx/glx.c	2021-10-13 23:49:59.663443188 +0800
+++ gl4es.mod/src/glx/glx.c	2021-10-13 23:48:57.699443233 +0800
@@ -770,8 +770,11 @@
     }
 
 	result = egl_eglChooseConfig(eglDisplay, configAttribs, fake->eglConfigs, 64, &fake->eglConfigsCount);
+
+#ifndef NO_GBM
     if(fake->eglConfigsCount && globals4es.usegbm)
         fake->eglconfigIdx = FindGBMConfig(eglDisplay, fake->eglConfigs, fake->eglConfigsCount);
+#endif
 
     CheckEGLErrors();
     if (result != EGL_TRUE || fake->eglConfigsCount == 0) {
@@ -951,10 +954,12 @@
         }
 
         result = egl_eglChooseConfig(eglDisplay, configAttribs, fake->eglConfigs, 64, &fake->eglConfigsCount);
+
+        fake->eglconfigIdx = 0;
+#ifndef NO_GBM
         if(fake->eglConfigsCount && globals4es.usegbm)
             fake->eglconfigIdx = FindGBMConfig(eglDisplay, fake->eglConfigs, fake->eglConfigsCount);
-        else
-            fake->eglconfigIdx = 0;
+#endif
 
         CheckEGLErrors();
         if (result != EGL_TRUE || fake->eglConfigsCount == 0) {
@@ -1819,7 +1824,7 @@
         attr[cur++] = EGL_STENCIL_SIZE;
         attr[cur++] = tmp;
     }
-    attr[1] |= (globals4es.usepbuffer)?(/*EGL_PBUFFER_BIT|*/EGL_PIXMAP_BIT):EGL_WINDOW_BIT;
+    attr[1] |= (globals4es.usepbuffer)?(EGL_PBUFFER_BIT/*|EGL_PIXMAP_BIT*/):EGL_WINDOW_BIT;
 
     attr[cur++] = EGL_RENDERABLE_TYPE;
     attr[cur++] = (hardext.esversion==1)?EGL_OPENGL_ES_BIT:EGL_OPENGL_ES2_BIT;