1 files changed, 17 insertions, 10 deletions

diff --git a/sway/config/output.c b/sway/config/output.c
index 0985b0e8..eefde22b 100644
--- a/sway/config/output.c
+++ b/sway/config/output.c
@@ -249,6 +249,8 @@ static void set_mode(struct wlr_output *output, struct wlr_output_state *pending
         // as (int)(1000 * mHz / 1000.f)
         // round() the result to avoid any error
         int mhz = (int)roundf(refresh_rate * 1000);
+        // If no target refresh rate is given, match highest available
+        mhz = mhz <= 0 ? INT_MAX : mhz;
 
         if (wl_list_empty(&output->modes) || custom) {
                 sway_log(SWAY_DEBUG, "Assigning custom mode to %s", output->name);
@@ -258,23 +260,28 @@ static void set_mode(struct wlr_output *output, struct wlr_output_state *pending
         }
 
         struct wlr_output_mode *mode, *best = NULL;
+        int best_diff_mhz = INT_MAX;
         wl_list_for_each(mode, &output->modes, link) {
                 if (mode->width == width && mode->height == height) {
-                        if (mode->refresh == mhz) {
-                                best = mode;
-                                break;
-                        }
-                        if (best == NULL || mode->refresh > best->refresh) {
+                        int diff_mhz = abs(mode->refresh - mhz);
+                        if (diff_mhz < best_diff_mhz) {
+                                best_diff_mhz = diff_mhz;
                                 best = mode;
+                                if (best_diff_mhz == 0) {
+                                        break;
+                                }
                         }
                 }
         }
-        if (!best) {
-                sway_log(SWAY_ERROR, "Configured mode for %s not available", output->name);
-                sway_log(SWAY_INFO, "Picking preferred mode instead");
-                best = wlr_output_preferred_mode(output);
+        if (best) {
+                sway_log(SWAY_INFO, "Assigning configured mode (%dx%d@%.3fHz) to %s",
+                        best->width, best->height, best->refresh / 1000.f, output->name);
         } else {
-                sway_log(SWAY_DEBUG, "Assigning configured mode to %s", output->name);
+                best = wlr_output_preferred_mode(output);
+                sway_log(SWAY_INFO, "Configured mode (%dx%d@%.3fHz) not available, "
+                        "applying preferred mode (%dx%d@%.3fHz)",
+                        width, height, refresh_rate,
+                        best->width, best->height, best->refresh / 1000.f);
         }
         wlr_output_state_set_mode(pending, best);
 }