Fix issue with headed mode on Linux

Author: mdmintz

seleniumbase/fixtures/base_case.py

@@ -12721,7 +12721,7 @@ def __activate_virtual_display_as_needed(self):
         """Should be needed only on Linux.
         The "--xvfb" arg is still useful, as it prevents headless mode,
         which is the default mode on Linux unless using another arg."""
-        if "linux" in sys.platform:
+        if "linux" in sys.platform and (not self.headed or self.xvfb):
             width = settings.HEADLESS_START_WIDTH
             height = settings.HEADLESS_START_HEIGHT
             try:

seleniumbase/plugins/selenium_plugin.py

@@ -1175,7 +1175,10 @@ def beforeTest(self, test):
         sb_config._virtual_display = None
         sb_config.headless_active = False
         self.headless_active = False
-        if "linux" in sys.platform:
+        if (
+            "linux" in sys.platform
+            and (not self.options.headed or self.options.xvfb)
+        ):
             width = settings.HEADLESS_START_WIDTH
             height = settings.HEADLESS_START_HEIGHT
             try: