diff --git a/ui/vnc.c b/ui/vnc.c
index e8e3426a65c4..7291429c04cf 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -659,6 +659,9 @@ void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 
 static void vnc_desktop_resize_ext(VncState *vs, int reject_reason)
 {
+    trace_vnc_msg_server_ext_desktop_resize(
+        vs, vs->ioc, vs->client_width, vs->client_height, reject_reason);
+
     vnc_lock_output(vs);
     vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
     vnc_write_u8(vs, 0);
@@ -705,6 +708,9 @@ static void vnc_desktop_resize(VncState *vs)
         return;
     }
 
+    trace_vnc_msg_server_desktop_resize(
+        vs, vs->ioc, vs->client_width, vs->client_height);
+
     vnc_lock_output(vs);
     vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
     vnc_write_u8(vs, 0);
@@ -1182,6 +1188,7 @@ static void audio_capture_notify(void *opaque, audcnotification_e cmd)
     assert(vs->magic == VNC_MAGIC);
     switch (cmd) {
     case AUD_CNOTIFY_DISABLE:
+        trace_vnc_msg_server_audio_end(vs, vs->ioc);
         vnc_lock_output(vs);
         vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
         vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
@@ -1191,6 +1198,7 @@ static void audio_capture_notify(void *opaque, audcnotification_e cmd)
         break;
 
     case AUD_CNOTIFY_ENABLE:
+        trace_vnc_msg_server_audio_begin(vs, vs->ioc);
         vnc_lock_output(vs);
         vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
         vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
@@ -1210,6 +1218,7 @@ static void audio_capture(void *opaque, const void *buf, int size)
     VncState *vs = opaque;
 
     assert(vs->magic == VNC_MAGIC);
+    trace_vnc_msg_server_audio_data(vs, vs->ioc, buf, size);
     vnc_lock_output(vs);
     if (vs->output.offset < vs->throttle_output_offset) {
         vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
@@ -2454,9 +2463,11 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
 
             switch (read_u16 (data, 2)) {
             case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE:
+                trace_vnc_msg_client_audio_enable(vs, vs->ioc);
                 audio_add(vs);
                 break;
             case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE:
+                trace_vnc_msg_client_audio_disable(vs, vs->ioc);
                 audio_del(vs);
                 break;
             case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT:
@@ -2492,6 +2503,8 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
                     break;
                 }
                 vs->as.freq = freq;
+                trace_vnc_msg_client_audio_format(
+                    vs, vs->ioc, vs->as.fmt, vs->as.nchannels, vs->as.freq);
                 break;
             default:
                 VNC_DEBUG("Invalid audio message %d\n", read_u8(data, 4));
@@ -2510,6 +2523,7 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
     {
         size_t size;
         uint8_t screens;
+        int w, h;
 
         if (len < 8) {
             return 8;
@@ -2520,12 +2534,15 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
         if (len < size) {
             return size;
         }
+        w = read_u16(data, 2);
+        h = read_u16(data, 4);
 
+        trace_vnc_msg_client_set_desktop_size(vs, vs->ioc, w, h, screens);
         if (dpy_ui_info_supported(vs->vd->dcl.con)) {
             QemuUIInfo info;
             memset(&info, 0, sizeof(info));
-            info.width = read_u16(data, 2);
-            info.height = read_u16(data, 4);
+            info.width = w;
+            info.height = h;
             dpy_set_ui_info(vs->vd->dcl.con, &info);
             vnc_desktop_resize_ext(vs, 4 /* Request forwarded */);
         } else {
diff --git a/ui/trace-events b/ui/trace-events
index 0ffcdb4408a6..bd8f8a9d186a 100644
--- a/ui/trace-events
+++ b/ui/trace-events
@@ -37,6 +37,15 @@ vnc_key_event_ext(bool down, int sym, int keycode, const char *name) "down %d, s
 vnc_key_event_map(bool down, int sym, int keycode, const char *name) "down %d, sym 0x%x -> keycode 0x%x [%s]"
 vnc_key_sync_numlock(bool on) "%d"
 vnc_key_sync_capslock(bool on) "%d"
+vnc_msg_server_audio_begin(void *state, void *ioc) "VNC server msg audio begin state=%p ioc=%p"
+vnc_msg_server_audio_end(void *state, void *ioc) "VNC server msg audio end state=%p ioc=%p"
+vnc_msg_server_audio_data(void *state, void *ioc, const void *buf, size_t len) "VNC server msg audio data state=%p ioc=%p buf=%p len=%zd"
+vnc_msg_server_desktop_resize(void *state, void *ioc, int width, int height) "VNC server msg ext resize state=%p ioc=%p size=%dx%d"
+vnc_msg_server_ext_desktop_resize(void *state, void *ioc, int width, int height, int reason) "VNC server msg ext resize state=%p ioc=%p size=%dx%d reason=%d"
+vnc_msg_client_audio_enable(void *state, void *ioc) "VNC client msg audio enable state=%p ioc=%p"
+vnc_msg_client_audio_disable(void *state, void *ioc) "VNC client msg audio disable state=%p ioc=%p"
+vnc_msg_client_audio_format(void *state, void *ioc, int fmt, int channels, int freq) "VNC client msg audio format state=%p ioc=%p fmt=%d channels=%d freq=%d"
+vnc_msg_client_set_desktop_size(void *state, void *ioc, int width, int height, int screens) "VNC client msg set desktop size  state=%p ioc=%p size=%dx%d screens=%d"
 vnc_client_eof(void *state, void *ioc) "VNC client EOF state=%p ioc=%p"
 vnc_client_io_error(void *state, void *ioc, const char *msg) "VNC client I/O error state=%p ioc=%p errmsg=%s"
 vnc_client_connect(void *state, void *ioc) "VNC client connect state=%p ioc=%p"
