diff --git a/wezterm-gui/src/termwindow/mod.rs b/wezterm-gui/src/termwindow/mod.rs
index c28764bb1..300ae4674 100644
--- a/wezterm-gui/src/termwindow/mod.rs
+++ b/wezterm-gui/src/termwindow/mod.rs
@@ -311,19 +311,6 @@ impl TermWindow {
                     config::wezterm_version(),
                 );
                 self.render_state.replace(gl);
-                /*
-                // Update dimensions: the goal here is to factor in the dpi and font
-                // size adjusted GUI window dimensions and apply those to the dimensions
-                // of the pty in the Mux layer.
-                let dims = self.dimensions.clone();
-                self.apply_dimensions(
-                    &dims,
-                    Some(resize::RowsAndCols {
-                        rows: self.terminal_size.rows as _,
-                        cols: self.terminal_size.cols as _,
-                    }),
-                );
-                */
             }
             Err(err) => {
                 log::error!("failed to create OpenGLRenderState: {}", err);
diff --git a/wezterm-gui/src/termwindow/resize.rs b/wezterm-gui/src/termwindow/resize.rs
index be1a06fde..d7381b643 100644
--- a/wezterm-gui/src/termwindow/resize.rs
+++ b/wezterm-gui/src/termwindow/resize.rs
@@ -205,8 +205,21 @@ impl super::TermWindow {
 
     #[allow(clippy::float_cmp)]
     pub fn scaling_changed(&mut self, dimensions: Dimensions, font_scale: f64, window: &Window) {
-        let scale_changed =
-            dimensions.dpi != self.dimensions.dpi || font_scale != self.fonts.get_font_scale();
+        fn dpi_adjusted(n: usize, dpi: usize) -> f32 {
+            n as f32 / dpi as f32
+        }
+
+        // Distinguish between eg: dpi being detected as double the initial dpi (where
+        // the pixel dimensions don't change), and the dpi change being detected, but
+        // where the window manager also decides to tile/resize the window.
+        // In the latter case, we don't want to preserve the terminal rows/cols.
+        let simple_dpi_change = dimensions.dpi != self.dimensions.dpi
+            && dpi_adjusted(dimensions.pixel_height, dimensions.dpi)
+                == dpi_adjusted(self.dimensions.pixel_height, self.dimensions.dpi)
+            && dpi_adjusted(dimensions.pixel_width, dimensions.dpi)
+                == dpi_adjusted(self.dimensions.pixel_width, self.dimensions.dpi);
+
+        let scale_changed = simple_dpi_change || font_scale != self.fonts.get_font_scale();
 
         let scale_changed_cells = if scale_changed {
             let cell_dims = self.current_cell_dimensions();