diff --git a/radio/src/gui/colorlcd/LvglWrapper.cpp b/radio/src/gui/colorlcd/LvglWrapper.cpp
index 2ae403b0c..f45c58246 100644
--- a/radio/src/gui/colorlcd/LvglWrapper.cpp
+++ b/radio/src/gui/colorlcd/LvglWrapper.cpp
@@ -50,10 +50,35 @@ TouchState getLastTochState()
 }
 #endif
 
-void newLcdRefresh(uint16_t* buffer);
+void newLcdRefresh(uint16_t* buffer, const rect_t& copy_area);
 static void flushLcd(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
 {
-  newLcdRefresh((uint16_t*)color_p);
+  lv_area_t refr_area;
+  lv_area_copy(&refr_area, area);
+
+#if defined(LCD_VERTICAL_INVERT)
+  lv_coord_t tmp_coord;
+  tmp_coord = refr_area.y2;
+  refr_area.y2 = LCD_H - refr_area.y1 - 1;
+  refr_area.y1 = LCD_H - tmp_coord - 1;
+  tmp_coord = refr_area.x2;
+  refr_area.x2 = LCD_W - refr_area.x1 - 1;
+  refr_area.x1 = LCD_W - tmp_coord - 1;
+#endif
+
+  if (refr_area.x1 != 0 || refr_area.x2 != 479 || refr_area.y1 != 0 ||
+      refr_area.y2 != 271) {
+    TRACE("partial refresh @ 0x%p {%d,%d,%d,%d}", color_p, refr_area.x1,
+          refr_area.y1, refr_area.x2, refr_area.y2);
+  } else {
+    TRACE("full refresh @ 0x%p", color_p);
+  }
+
+  rect_t copy_area = {refr_area.x1, refr_area.y1,
+                      refr_area.x2 - refr_area.x1 + 1,
+                      refr_area.y2 - refr_area.y1 + 1};
+
+  newLcdRefresh((uint16_t*)color_p, copy_area);
   lv_disp_flush_ready(disp_drv);
 }
 
@@ -170,9 +195,6 @@ lv_color_t makeLvColor(uint32_t colorFlags)
   return lv_color_make(GET_RED(color), GET_GREEN(color), GET_BLUE(color));
 }
 
-lv_obj_t * canvas=nullptr;
-static lv_color_t cbuf[LV_CANVAS_BUF_SIZE_TRUE_COLOR(LCD_W, LCD_H)] __SDRAM;
-BitmapBuffer canBuf(BMP_RGB565, LCD_W, LCD_H, (uint16_t *)cbuf);
 
 extern BitmapBuffer * lcdFront;
 extern BitmapBuffer * lcd;
@@ -233,15 +255,9 @@ LvglWrapper::LvglWrapper()
   // Create a canvas as the drawing target for libopenui as a hack.
   // This is going to be removed
   //
-  canvas = lv_canvas_create(lv_scr_act());
-  lv_canvas_set_buffer(canvas, cbuf, LCD_W, LCD_H, LV_IMG_CF_TRUE_COLOR);
-  lv_obj_set_style_bg_opa(canvas, LV_OPA_MAX, LV_PART_MAIN);
 
   auto window = MainWindow::instance();
-  lv_obj_set_parent(canvas, window->getLvObj());
-  lv_obj_move_background(canvas);
   lv_scr_load(window->getLvObj());
-  lv_obj_invalidate(canvas);
 }
 
 void LvglWrapper::run()
diff --git a/radio/src/gui/colorlcd/themes/480_default.cpp b/radio/src/gui/colorlcd/themes/480_default.cpp
index 2ba11066c..fab2e51fa 100644
--- a/radio/src/gui/colorlcd/themes/480_default.cpp
+++ b/radio/src/gui/colorlcd/themes/480_default.cpp
@@ -311,11 +311,9 @@ class Theme480: public OpenTxTheme
     {
       if (backgroundBitmap) {
         dc->clear(COLOR_THEME_SECONDARY3);
-        dc->drawBitmap(0 - dc->getOffsetX(), 0 - dc->getOffsetY(), backgroundBitmap);
-      }
-      else {
-        dc->drawSolidFilledRect(0 - dc->getOffsetX(), 0 - dc->getOffsetY(),
-                                LCD_W, LCD_H, COLOR_THEME_SECONDARY3);
+        dc->drawBitmap(0, 0, backgroundBitmap);
+      } else {
+        dc->drawSolidFilledRect(0, 0, LCD_W, LCD_H, COLOR_THEME_SECONDARY3);
       }
     }
 
diff --git a/radio/src/simu.cpp b/radio/src/simu.cpp
index 09fcadb55..f323775b5 100644
--- a/radio/src/simu.cpp
+++ b/radio/src/simu.cpp
@@ -524,8 +524,6 @@ void OpenTxSim::refreshDisplay()
 
   if ((bool(isBacklightEnabled()) != lightEnabled) || simuLcdRefresh) {
 
-    simuLcdRefresh = false;
-
     if (bool(isBacklightEnabled()) != lightEnabled) {
       lightEnabled = (bool)isBacklightEnabled();
       TRACE("backlight %s", lightEnabled ? "ON" : "OFF");
@@ -575,6 +573,8 @@ void OpenTxSim::refreshDisplay()
 
     bmp->render();
     bmf->setImage(bmp);
+
+    simuLcdRefresh = false;
   }
 }
 
diff --git a/radio/src/targets/simu/simulcd.cpp b/radio/src/targets/simu/simulcd.cpp
index 5850e7400..9312a4ed2 100644
--- a/radio/src/targets/simu/simulcd.cpp
+++ b/radio/src/targets/simu/simulcd.cpp
@@ -85,22 +85,37 @@ int lcdRestoreBackupBuffer()
   return 1;
 }
 
-void newLcdRefresh(uint16_t *buffer)
+void newLcdRefresh(uint16_t *buffer, const rect_t& copy_area)
 {
+
+#if defined(LCD_VERTICAL_INVERT)
+  auto total = copy_area.w * copy_area.h;
+  auto src = buffer + total - 1;
+#else
+  auto src = buffer;
+#endif
+  auto dst = simuLcdBuf + copy_area.y * LCD_W + copy_area.x;
+
+  auto y2 = copy_area.y + copy_area.h;
+  for (auto line = copy_area.y; line < y2; line++) {
+
+    auto line_end = dst + copy_area.w;
+    while (dst != line_end) {
+#if defined(LCD_VERTICAL_INVERT)
+      *(dst++) = *(src--);
+#else
+      *(dst++) = *(src++);
+#endif
+    }
+
+    dst += LCD_W - copy_area.w;
+  }
+
   // Mark screen dirty for async refresh
   simuLcdRefresh = true;
 
-#if defined(LCD_VERTICAL_INVERT)
-  auto src = buffer + DISPLAY_BUFFER_SIZE - 1;
-  auto dst = simuLcdBuf;
-  auto end = dst + DISPLAY_BUFFER_SIZE;
-
-  while (dst != end) {
-    *(dst++) = *(src--);
-  }
-#else
-  memcpy(simuLcdBuf, buffer, DISPLAY_BUFFER_SIZE * sizeof(pixel_t));
-#endif
+  // .. and wait for refresh
+  while(simuLcdRefresh);
 }
 void lcdRefresh()
 {
@@ -134,11 +149,6 @@ void lcdInit()
 void DMAFillRect(uint16_t *dest, uint16_t destw, uint16_t desth, uint16_t x,
                  uint16_t y, uint16_t w, uint16_t h, uint16_t color)
 {
-#if defined(LCD_VERTICAL_INVERT) && 0
-  x = destw - (x + w);
-  y = desth - (y + h);
-#endif
-
   for (int i = 0; i < h; i++) {
     for (int j = 0; j < w; j++) {
       dest[(y + i) * destw + x + j] = color;
@@ -151,13 +161,6 @@ void DMACopyBitmap(uint16_t *dest, uint16_t destw, uint16_t desth, uint16_t x,
                    uint16_t srch, uint16_t srcx, uint16_t srcy, uint16_t w,
                    uint16_t h)
 {
-#if defined(LCD_VERTICAL_INVERT) && 0
-  x = destw - (x + w);
-  y = desth - (y + h);
-  srcx = srcw - (srcx + w);
-  srcy = srch - (srcy + h);
-#endif
-
   for (int i = 0; i < h; i++) {
     memcpy(dest + (y + i) * destw + x, src + (srcy + i) * srcw + srcx, 2 * w);
   }
@@ -170,13 +173,6 @@ void DMACopyAlphaBitmap(uint16_t *dest, uint16_t destw, uint16_t desth,
                         uint16_t srcw, uint16_t srch, uint16_t srcx,
                         uint16_t srcy, uint16_t w, uint16_t h)
 {
-#if defined(LCD_VERTICAL_INVERT) && 0
-  x = destw - (x + w);
-  y = desth - (y + h);
-  srcx = srcw - (srcx + w);
-  srcy = srch - (srcy + h);
-#endif
-
   for (coord_t line = 0; line < h; line++) {
     uint16_t *p = dest + (y + line) * destw + x;
     const uint16_t *q = src + (srcy + line) * srcw + srcx;
@@ -205,13 +201,6 @@ void DMACopyAlphaMask(uint16_t *dest, uint16_t destw, uint16_t desth,
                       uint16_t srch, uint16_t srcx, uint16_t srcy, uint16_t w,
                       uint16_t h, uint16_t fg_color)
 {
-#if defined(LCD_VERTICAL_INVERT) && 0
-  x = destw - (x + w);
-  y = desth - (y + h);
-  srcx = srcw - (srcx + w);
-  srcy = srch - (srcy + h);
-#endif
-
   RGB_SPLIT(fg_color, red, green, blue);
 
   for (coord_t line = 0; line < h; line++) {
diff --git a/radio/src/thirdparty/libopenui b/radio/src/thirdparty/libopenui
index 9fd291d24..b0c8cf121 160000
--- a/radio/src/thirdparty/libopenui
+++ b/radio/src/thirdparty/libopenui
@@ -1 +1 @@
-Subproject commit 9fd291d24d3892b28cfd771e78ad502b332e3398
+Subproject commit b0c8cf12165001a023620a9761963e90827cd11b