diff --git a/src/compton.c b/src/compton.c
index f10baa0..5ba9d3c 100644
--- a/src/compton.c
+++ b/src/compton.c
@@ -4064,8 +4064,8 @@ write_binary_data(const char *path, const unsigned char *data, int length) {
   int wrote_len = fwrite(data, sizeof(unsigned char), length, f);
   fclose(f);
   if (wrote_len != length) {
-    printf_errf("(\"%s\"): Failed to write all blocks: %d / %d", path,
-        wrote_len, length);
+    log_error("Failed to write all blocks: %d / %d to %s",
+        wrote_len, length, path);
     return false;
   }
   return true;
diff --git a/src/compton.h b/src/compton.h
index 161497e..c4d814e 100644
--- a/src/compton.h
+++ b/src/compton.h
@@ -134,7 +134,7 @@ static inline bool
 wid_set_text_prop(session_t *ps, Window wid, Atom prop_atom, char *str) {
   XTextProperty *pprop = make_text_prop(ps, str);
   if (!pprop) {
-    printf_errf("(\"%s\"): Failed to make text property.", str);
+    log_error("Failed to make text property: %s.", str);
     return false;
   }
 
@@ -155,10 +155,11 @@ dump_drawable(session_t *ps, Drawable drawable) {
   unsigned width = 0, height = 0, border = 0, depth = 0;
   if (XGetGeometry(ps->dpy, drawable, &rroot, &x, &y, &width, &height,
         &border, &depth)) {
-    printf_dbgf("(%#010lx): x = %u, y = %u, wid = %u, hei = %d, b = %u, d = %u\n", drawable, x, y, width, height, border, depth);
+    log_trace("Drawable %#010lx: x = %u, y = %u, wid = %u, hei = %d, b = %u, d = %u",
+              drawable, x, y, width, height, border, depth);
   }
   else {
-    printf_dbgf("(%#010lx): Failed\n", drawable);
+    log_trace("Drawable %#010lx: Failed", drawable);
   }
 }
 
diff --git a/src/x.c b/src/x.c
index 72fe7f1..b56dd2a 100644
--- a/src/x.c
+++ b/src/x.c
@@ -112,7 +112,7 @@ static inline void x_get_server_pictfmts(session_t *ps) {
     xcb_render_query_pict_formats_reply(ps->c,
         xcb_render_query_pict_formats(ps->c), &e);
   if (e || !ps->pictfmts) {
-    printf_errf("(): failed to get pict formats\n");
+    log_fatal("failed to get pict formats\n");
     abort();
   }
 }
@@ -142,8 +142,8 @@ x_create_picture_with_pictfmt_and_pixmap(
   if (attr) {
     xcb_render_create_picture_value_list_serialize(&buf, valuemask, attr);
     if (!buf) {
-      printf_errf("(): failed to serialize picture attributes");
-      return None;
+      log_error("failed to serialize picture attributes");
+      return XCB_NONE;
     }
   }
 
@@ -153,8 +153,8 @@ x_create_picture_with_pictfmt_and_pixmap(
       pixmap, pictfmt->id, valuemask, buf));
   free(buf);
   if (e) {
-    printf_errf("(): failed to create picture");
-    return None;
+    log_error("failed to create picture");
+    return XCB_NONE;
   }
   return tmp_picture;
 }
diff --git a/src/xrescheck.c b/src/xrescheck.c
index 917bb0b..b4cca7e 100644
--- a/src/xrescheck.c
+++ b/src/xrescheck.c
@@ -40,8 +40,8 @@ xrc_delete_xid_(XID xid, M_POS_DATA_PARAMS) {
   xrc_xid_record_t *prec = NULL;
   HASH_FIND_XID(gs_xid_records, &xid, prec);
   if (!prec) {
-    printf_err("XRC: %s:%d %s(): Can't find XID %#010lx we want to delete.",
-        file, line, func, xid);
+    log_error("XRC: %s:%d %s(): Can't find XID %#010lx we want to delete.",
+              file, line, func, xid);
     return;
   }
   HASH_DEL(gs_xid_records, prec);
@@ -54,8 +54,8 @@ xrc_delete_xid_(XID xid, M_POS_DATA_PARAMS) {
 void
 xrc_report_xid(void) {
   for (xrc_xid_record_t *prec = gs_xid_records; prec; prec = prec->hh.next)
-    printf_dbg("XRC: %s:%d %s(): %#010lx (%s) not freed.\n",
-        prec->file, prec->line, prec->func, prec->xid, prec->type);
+    log_trace("XRC: %s:%d %s(): %#010lx (%s) not freed.\n",
+              prec->file, prec->line, prec->func, prec->xid, prec->type);
 }
 
 /**