diff --git a/device/gxx-linux/usb/src/async_model/hardware/hardware.cpp b/device/gxx-linux/usb/src/async_model/hardware/hardware.cpp
index 84624b5..11944b1 100644
--- a/device/gxx-linux/usb/src/async_model/hardware/hardware.cpp
+++ b/device/gxx-linux/usb/src/async_model/hardware/hardware.cpp
@@ -57,6 +57,7 @@ void image_capture::set_dpi_val(int dpi)
 	int x = dpi,
 		y = dpi;
 
+	dpi_x_ = dpi_y_ = dpi;
 	if(first)
 		first = false;
 	else
@@ -455,6 +456,8 @@ bool image_capture::update_enabled(const char* name, std::function<GET_SANE_OPT_
 
 	if(strcmp(name, "paper") == 0)
 		refresh_paper_size(CHG_PAPER_SIZE_FROM_PAPER);
+	else if(strcmp(name, "resolution") == 0)
+		refresh_paper_size(CHG_PAPER_SIZE_FROM_DPI);
 
 	return changed;
 }