From 0fc87576f3fa7a062809c025cb5d3bc9102fb10c Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Sun, 9 Jan 2022 16:50:47 +1100
Subject: [PATCH] [client] core: fallback to manual realignment if the LGMP
 message fails

---
 client/src/core.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/client/src/core.c b/client/src/core.c
index 5deda96a..6b14c7e7 100644
--- a/client/src/core.c
+++ b/client/src/core.c
@@ -468,8 +468,14 @@ void core_handleMouseNormal(double ex, double ey)
       };
 
       uint32_t setPosSerial;
-      if (lgmpClientSendData(g_state.pointerQueue,
-            &msg, sizeof(msg), &setPosSerial) == LGMP_OK)
+      LGMP_STATUS status;
+      if ((status = lgmpClientSendData(g_state.pointerQueue,
+            &msg, sizeof(msg), &setPosSerial)) != LGMP_OK)
+      {
+        DEBUG_WARN("Message send failed: %s", lgmpStatusString(status));
+        goto fallback;
+      }
+      else
       {
         /* wait for the move request to be processed */
         do
@@ -498,6 +504,7 @@ void core_handleMouseNormal(double ex, double ey)
     }
     else
     {
+fallback:
       /* add the difference to the offset */
       ex += guest.x - (g_cursor.guest.x + g_cursor.guest.hx);
       ey += guest.y - (g_cursor.guest.y + g_cursor.guest.hy);