diff --git a/Makefile b/Makefile
index 4d9e1b62..70616510 100644
--- a/Makefile
+++ b/Makefile
@@ -48,6 +48,8 @@ clean_trezorhal: ## clean trezorhal build
 
 clean_unix: ## clean unix build
 	$(MAKE) -f ../../../micropython/unix/Makefile -C vendor/micropython/unix clean $(UNIX_PORT_OPTS)
+	# workaround for relative paths containing ../.. in unix Makefile
+	rm -rf vendor/micropython/micropython
 
 clean_cross: ## clean mpy-cross build
 	$(MAKE) -C vendor/micropython/mpy-cross clean $(CROSS_PORT_OPTS)
diff --git a/micropython/extmod/modtrezorui/display-stmhal.h b/micropython/extmod/modtrezorui/display-stmhal.h
index 144c051f..c99853fe 100644
--- a/micropython/extmod/modtrezorui/display-stmhal.h
+++ b/micropython/extmod/modtrezorui/display-stmhal.h
@@ -285,3 +285,7 @@ void display_refresh(void) {
     while (GPIO_PIN_RESET == HAL_GPIO_ReadPin(GPIOD, GPIO_PIN_12)) { }
     while (GPIO_PIN_SET == HAL_GPIO_ReadPin(GPIOD, GPIO_PIN_12)) { }
 }
+
+void display_save(const char *filename)
+{
+}
diff --git a/micropython/extmod/modtrezorui/display-unix-null.h b/micropython/extmod/modtrezorui/display-unix-null.h
deleted file mode 100644
index 382c1f41..00000000
--- a/micropython/extmod/modtrezorui/display-unix-null.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright (c) Pavol Rusnak, SatoshiLabs
- *
- * Licensed under TREZOR License
- * see LICENSE file for details
- */
-
-#define CMD(X) (void)(X);
-#define DATA(X) (void)(X);
-
-void display_init(void)
-{
-}
-
-static void display_set_window(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
-{
-}
-
-void display_refresh(void)
-{
-}
-
-static void display_set_orientation(int degrees)
-{
-}
-
-static void display_set_backlight(int val)
-{
-}
diff --git a/micropython/extmod/modtrezorui/display-unix-sdl.h b/micropython/extmod/modtrezorui/display-unix.h
similarity index 88%
rename from micropython/extmod/modtrezorui/display-unix-sdl.h
rename to micropython/extmod/modtrezorui/display-unix.h
index bcd24b7a..88537a59 100644
--- a/micropython/extmod/modtrezorui/display-unix-sdl.h
+++ b/micropython/extmod/modtrezorui/display-unix.h
@@ -6,7 +6,9 @@
  */
 
 #include <stdlib.h>
+#ifndef TREZOR_NOUI
 #include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
 
 #define DISPLAY_BORDER 16
 
@@ -16,8 +18,6 @@ static SDL_Texture  *TEXTURE  = 0;
 static int DATAODD = 0;
 static int POSX, POSY, SX, SY, EX, EY = 0;
 
-#define CMD(X) (void)(X);
-
 void DATA(uint8_t x) {
     if (POSX <= EX && POSY <= EY) {
         ((uint8_t *)BUFFER->pixels)[POSX * 2 + POSY * BUFFER->pitch + (DATAODD ^ 1)] = x;
@@ -31,9 +31,13 @@ void DATA(uint8_t x) {
         }
     }
 }
+#else
+#define DATA(X) (void)(X);
+#endif
 
 void display_init(void)
 {
+#ifndef TREZOR_NOUI
     if (SDL_Init(SDL_INIT_VIDEO) != 0) {
         printf("SDL_Init Error: %s\n", SDL_GetError());
     }
@@ -54,23 +58,28 @@ void display_init(void)
     TEXTURE = SDL_CreateTexture(RENDERER, SDL_PIXELFORMAT_RGB565, SDL_TEXTUREACCESS_STREAMING, DISPLAY_RESX, DISPLAY_RESY);
     SDL_SetTextureBlendMode(TEXTURE, SDL_BLENDMODE_NONE);
     SDL_SetTextureAlphaMod(TEXTURE, 0);
+#endif
 }
 
 static void display_set_window(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
 {
+#ifndef TREZOR_NOUI
     SX = x0; SY = y0;
     EX = x1; EY = y1;
     POSX = SX; POSY = SY;
     DATAODD = 0;
+#endif
 }
 
 void display_refresh(void)
 {
+#ifndef TREZOR_NOUI
     SDL_RenderClear(RENDERER);
     SDL_UpdateTexture(TEXTURE, NULL, BUFFER->pixels, BUFFER->pitch);
     const SDL_Rect r = {DISPLAY_BORDER, DISPLAY_BORDER, DISPLAY_RESX, DISPLAY_RESY};
     SDL_RenderCopyEx(RENDERER, TEXTURE, NULL, &r, ORIENTATION, NULL, 0);
     SDL_RenderPresent(RENDERER);
+#endif
 }
 
 static void display_set_orientation(int degrees)
@@ -79,5 +88,14 @@ static void display_set_orientation(int degrees)
 
 static void display_set_backlight(int val)
 {
+#ifndef TREZOR_NOUI
     SDL_SetRenderDrawColor(RENDERER, val, val, val, 255);
+#endif
+}
+
+void display_save(const char *filename)
+{
+#ifndef TREZOR_NOUI
+    IMG_SavePNG(BUFFER, filename);
+#endif
 }
diff --git a/micropython/extmod/modtrezorui/display.c b/micropython/extmod/modtrezorui/display.c
index 05d53a5b..b98b5ff9 100644
--- a/micropython/extmod/modtrezorui/display.c
+++ b/micropython/extmod/modtrezorui/display.c
@@ -23,11 +23,7 @@ static int OFFSET[2] = {0, 0};
 #if defined STM32_HAL_H
 #include "display-stmhal.h"
 #else
-#ifndef TREZOR_NOUI
-#include "display-unix-sdl.h"
-#else
-#include "display-unix-null.h"
-#endif
+#include "display-unix.h"
 #endif
 
 // common display functions
diff --git a/micropython/extmod/modtrezorui/display.h b/micropython/extmod/modtrezorui/display.h
index 75356b19..695ad569 100644
--- a/micropython/extmod/modtrezorui/display.h
+++ b/micropython/extmod/modtrezorui/display.h
@@ -19,24 +19,34 @@
 
 #define LOADER_ICON_SIZE 64
 
+// provided by port
+
 void display_init(void);
-int display_orientation(int degrees);
-int display_backlight(int val);
-int *display_offset(int xy[2]);
+void display_refresh(void);
+void display_save(const char *filename);
+
+// provided by common
 
 void display_clear(void);
-void display_refresh(void);
 
 void display_bar(int x, int y, int w, int h, uint16_t c);
 void display_bar_radius(int x, int y, int w, int h, uint16_t c, uint16_t b, uint8_t r);
+
 void display_image(int x, int y, int w, int h, const void *data, int datalen);
 void display_icon(int x, int y, int w, int h, const void *data, int datalen, uint16_t fgcolor, uint16_t bgcolor);
-void display_qrcode(int x, int y, const char *data, int datalen, uint8_t scale);
-void display_loader(uint16_t progress, int yoffset, uint16_t fgcolor, uint16_t bgcolor, const uint8_t *icon, uint32_t iconlen, uint16_t iconfgcolor);
+
 void display_print(const char *text, int textlen);
+
 void display_text(int x, int y, const char *text, int textlen, uint8_t font, uint16_t fgcolor, uint16_t bgcolor);
 void display_text_center(int x, int y, const char *text, int textlen, uint8_t font, uint16_t fgcolor, uint16_t bgcolor);
 void display_text_right(int x, int y, const char *text, int textlen, uint8_t font, uint16_t fgcolor, uint16_t bgcolor);
 int display_text_width(const char *text, int textlen, uint8_t font);
 
+void display_qrcode(int x, int y, const char *data, int datalen, uint8_t scale);
+void display_loader(uint16_t progress, int yoffset, uint16_t fgcolor, uint16_t bgcolor, const uint8_t *icon, uint32_t iconlen, uint16_t iconfgcolor);
+
+int *display_offset(int xy[2]);
+int display_orientation(int degrees);
+int display_backlight(int val);
+
 #endif
diff --git a/micropython/extmod/modtrezorui/modtrezorui-display.h b/micropython/extmod/modtrezorui/modtrezorui-display.h
index b1b1cfbe..cf4d8c9a 100644
--- a/micropython/extmod/modtrezorui/modtrezorui-display.h
+++ b/micropython/extmod/modtrezorui/modtrezorui-display.h
@@ -352,6 +352,20 @@ STATIC mp_obj_t mod_TrezorUi_Display_offset(size_t n_args, const mp_obj_t *args)
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorUi_Display_offset_obj, 1, 2, mod_TrezorUi_Display_offset);
 
+/// def trezor.ui.display.save(filename: string) -> None:
+///     '''
+///     Saves current display contents to file filename.
+///     '''
+STATIC mp_obj_t mod_TrezorUi_Display_save(mp_obj_t self, mp_obj_t filename) {
+    mp_buffer_info_t fn;
+    mp_get_buffer_raise(filename, &fn, MP_BUFFER_READ);
+    if (fn.len > 0) {
+        display_save(fn.buf);
+    }
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorUi_Display_save_obj, mod_TrezorUi_Display_save);
+
 STATIC const mp_rom_map_elem_t mod_TrezorUi_Display_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_clear), MP_ROM_PTR(&mod_TrezorUi_Display_clear_obj) },
     { MP_ROM_QSTR(MP_QSTR_refresh), MP_ROM_PTR(&mod_TrezorUi_Display_refresh_obj) },
@@ -369,6 +383,7 @@ STATIC const mp_rom_map_elem_t mod_TrezorUi_Display_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_orientation), MP_ROM_PTR(&mod_TrezorUi_Display_orientation_obj) },
     { MP_ROM_QSTR(MP_QSTR_backlight), MP_ROM_PTR(&mod_TrezorUi_Display_backlight_obj) },
     { MP_ROM_QSTR(MP_QSTR_offset), MP_ROM_PTR(&mod_TrezorUi_Display_offset_obj) },
+    { MP_ROM_QSTR(MP_QSTR_save), MP_ROM_PTR(&mod_TrezorUi_Display_save_obj) },
     { MP_ROM_QSTR(MP_QSTR_FONT_MONO), MP_OBJ_NEW_SMALL_INT(FONT_MONO) },
     { MP_ROM_QSTR(MP_QSTR_FONT_NORMAL), MP_OBJ_NEW_SMALL_INT(FONT_NORMAL) },
     { MP_ROM_QSTR(MP_QSTR_FONT_BOLD), MP_OBJ_NEW_SMALL_INT(FONT_BOLD) },
diff --git a/micropython/unix/Makefile b/micropython/unix/Makefile
index fe9f21c2..ed853614 100644
--- a/micropython/unix/Makefile
+++ b/micropython/unix/Makefile
@@ -89,7 +89,7 @@ ifeq ($(MICROPY_PY_TREZORUI),1)
 ifeq ($(TREZOR_NOUI),1)
 	CFLAGS_MOD += -DTREZOR_NOUI=1
 else
-	LDFLAGS_MOD += -lSDL2
+	LDFLAGS_MOD += -lSDL2 -lSDL2_image
 endif
 endif