FIXED (tentative) simplify xvfb parameters

.gitlab/test.sh

@@ -17,7 +17,8 @@ if [[ "$osName" != "win7" ]]; then
     # Starts the server first (try to avoid unexpected and random "QXcbConnection: Could not connect to display :99")
     # see also https://doc.qt.io/qt-5/embedded-linux.html#linuxfb 
     export DISPLAY=":98"
-    Xvfb $DISPLAY -screen 0 1600x1200x24 -ac +extension GLX +render -noreset -v -fbdir $workingDir/ &> ${PROJECT_LOG_DIR}/test.log &
+    #-ac +extension GLX +render -noreset -v -fbdir $workingDir/ &> ${PROJECT_LOG_DIR}/test.log &
+    Xvfb $DISPLAY -screen 0 1600x1200x24 &> ${PROJECT_LOG_DIR}/test.log &
     trap "kill $! || true" EXIT
     sleep 10
     export XAUTHORITY=/dev/null