diff -Nru PackageKit-0.9.5.orig/backends/smart/smartBackend.py PackageKit-0.9.5/backends/smart/smartBackend.py
--- PackageKit-0.9.5.orig/backends/smart/smartBackend.py	2015-08-19 00:28:41.888881409 +0200
+++ PackageKit-0.9.5/backends/smart/smartBackend.py	2015-08-19 00:29:05.737801008 +0200
@@ -204,7 +204,10 @@
         else:
             self.status(STATUS_INSTALL)
             self._packagesdict = trans.getChangeSet()
-            self.ctrl.commitTransaction(trans, confirm=False)
+            try:
+                self.ctrl.commitTransaction(trans, confirm=False)
+            except smart.Error, e:
+                self.error(ERROR_PACKAGE_FAILED_TO_INSTALL, e, exit=False)
 
     @needs_cache
     def install_files(self, transaction_flags, paths):
@@ -230,7 +233,10 @@
         else:
             self.status(STATUS_INSTALL)
             self._packagesdict = trans.getChangeSet()
-            self.ctrl.commitTransaction(trans, confirm=False)
+            try:
+                self.ctrl.commitTransaction(trans, confirm=False)
+            except smart.Error, e:
+                self.error(ERROR_PACKAGE_FAILED_TO_INSTALL, e, exit=False)
 
     @needs_cache
     def remove_packages(self, transaction_flags, packageids, allow_deps, autoremove):
@@ -270,7 +276,10 @@
         else:
             self.status(STATUS_REMOVE)
             self._packagesdict = trans.getChangeSet()
-            self.ctrl.commitTransaction(trans, confirm=False)
+            try:
+                self.ctrl.commitTransaction(trans, confirm=False)
+            except smart.Error, e:
+                self.error(ERROR_PACKAGE_FAILED_TO_REMOVE, e, exit=False)
 
     @needs_cache
     def update_packages(self, transaction_flags, packageids):
@@ -299,7 +308,10 @@
         else:
             self.status(STATUS_UPDATE)
             self._packagesdict = trans.getChangeSet()
-            self.ctrl.commitTransaction(trans, confirm=False)
+            try:
+                self.ctrl.commitTransaction(trans, confirm=False)
+            except smart.Error, e:
+                self.error(ERROR_PACKAGE_FAILED_TO_INSTALL, e, exit=False)
 
     @needs_cache
     def download_packages(self, directory, packageids):
@@ -344,7 +356,10 @@
             return
         self.status(STATUS_UPDATE)
         self._packagesdict = trans.getChangeSet()
-        self.ctrl.commitTransaction(trans, confirm=False)
+        try:
+            self.ctrl.commitTransaction(trans, confirm=False)
+        except smart.Error, e:
+            self.error(ERROR_PACKAGE_FAILED_TO_INSTALL, e, exit=False)
 
     @needs_cache
     def get_updates(self, filters):