diff --git a/doc/source/support-matrix.ini b/doc/source/support-matrix.ini
index 6929b3dcb2aa..6d96376467d0 100644
--- a/doc/source/support-matrix.ini
+++ b/doc/source/support-matrix.ini
@@ -533,6 +533,10 @@ driver-impl-libvirt-kvm-ppc64=complete
 driver-impl-libvirt-kvm-s390x=complete
 driver-impl-libvirt-qemu-x86=complete
 driver-impl-libvirt-lxc=complete
+driver-notes-libvirt-lxc=Fails in latest Ubuntu Trusty kernel
+    from security repository (3.13.0-76-generic), but works in upstream
+    3.13.x kernels as well as default Ubuntu Trusty latest kernel
+    (3.13.0-58-generic).
 driver-impl-libvirt-xen=complete
 driver-impl-vmware=complete
 driver-impl-hyperv=complete