diff --git a/Apps/Explorer/desk_server.vp b/Apps/Explorer/desk_server.vp
index 0346931..a87366e 100644
--- a/Apps/Explorer/desk_server.vp
+++ b/Apps/Explorer/desk_server.vp
@@ -1002,6 +1002,10 @@ class DeskServer:
     def handle_request(self, m: desk.DeskMsg):
         if m.type == uint32(desk.DESK_REQ_CREATE):
             # pid 随请求携带（窗口还没诞生），标题内联在消息里
+            _sb: [96]char
+            viperlib.snprintf(&_sb, 96, "[explorer] create style=%d w=%d h=%d\n",
+                              int(m.style), m.c, m.d)
+            devfs.serial_puts(&_sb)
             nw: int = self.alloc_window(m.pid, m.a, m.b, m.c, m.d, int(m.style))
             if nw >= 0:
                 ns: desk.WinSlot* = self.slot(nw)
diff --git a/VKernel/Kernel/main.vp b/VKernel/Kernel/main.vp
index e91b1de..d5a0e71 100644
--- a/VKernel/Kernel/main.vp
+++ b/VKernel/Kernel/main.vp
@@ -347,9 +347,9 @@ class ViperKernel:
         mse_svc.start()
         serial.puts("[main] services started\n")
 
-        VGA_drv = vga._VGAScreenDriver(fb, width, height, pitch, fb_format)
-        self.VGA = &VGA_drv
-        self.VGA.Print(100, 100, "ViperOS VKernel Test")
+        # S3e 之后屏幕由用户态 explorer 独占合成：内核不再创建 VGA 驱动、不再往 framebuffer
+        # 画任何东西。原先这里会 Print 一行测试文本，而它执行时间在 explorer 启动之后 ——
+        # 等于把内核测试内容盖在桌面上（也是屏幕上蓝色/文本残留的来源）。
         _CheckFrameLocals("after_vga", fb, width, height, pitch)
         serial.puts("你好\n")