--- ./libdrm-2.4.95/intel/intel_bufmgr_gem.c	2018-10-04 16:50:03.000000000 +0200
+++ /home/gert/srclibdrm/./libdrm-2.4.95/intel/intel_bufmgr_gem.c	2019-02-19 22:38:28.139415220 +0100
@@ -2436,6 +2436,17 @@
 							      bufmgr_gem->exec_count),
 			    (unsigned int) bufmgr_gem->gtt_size);
 		}
+		else {
+			if ( ret == -EDEADLK) {
+		                if (bufmgr_gem->gen < 4) {
+				       fprintf(stderr, "WARNING: do_exec2: requested number of fence registers too high.\n%s\n%s\n",
+				                       "Might cause rendering defects on current screen.",
+				                       "Available registers decremented by 1.");
+				       bufmgr_gem->available_fences--;
+				       ret = 0;
+				}
+			}
+		}
 	}
 	drm_intel_update_buffer_offsets2(bufmgr_gem);