From 1350816199b95927273ca17b3ec867a16382d0ee Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Fri, 9 Nov 2012 11:45:37 +0100
Subject: [PATCH] test-instrumentation.nix: Don't start agetty on hvc0

---
 modules/testing/test-instrumentation.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/testing/test-instrumentation.nix b/modules/testing/test-instrumentation.nix
index 8ceffbcb9ec..0ee3ad65a3d 100644
--- a/modules/testing/test-instrumentation.nix
+++ b/modules/testing/test-instrumentation.nix
@@ -33,8 +33,9 @@ let kernel = config.boot.kernelPackages.kernel; in
 
     # Prevent agetty from being instantiated on ttyS0, since it
     # interferes with the backdoor (writes to ttyS0 will randomly fail
-    # with EIO).
+    # with EIO).  Likewise for hvc0.
     boot.systemd.services."serial-getty@ttyS0".enable = false;
+    boot.systemd.services."serial-getty@hvc0".enable = false;
 
     boot.initrd.postDeviceCommands =
       ''