diff --git a/Makefile b/Makefile
index 29e3d8ce..72316fcd 100644
--- a/Makefile
+++ b/Makefile
@@ -152,6 +152,10 @@ endif
 	ln -s qvm-device $(DESTDIR)/usr/bin/qvm-block
 	ln -s qvm-device $(DESTDIR)/usr/bin/qvm-pci
 	ln -s qvm-device $(DESTDIR)/usr/bin/qvm-usb
+	install -d $(DESTDIR)/usr/share/man/man1
+	ln -s qvm-device.1.gz $(DESTDIR)/usr/share/man/man1/qvm-block.1.gz
+	ln -s qvm-device.1.gz $(DESTDIR)/usr/share/man/man1/qvm-pci.1.gz
+	ln -s qvm-device.1.gz $(DESTDIR)/usr/share/man/man1/qvm-usb.1.gz
 #	$(MAKE) install -C tests
 	$(MAKE) install -C relaxng
 	mkdir -p $(DESTDIR)/etc/qubes
diff --git a/qubes/backup.py b/qubes/backup.py
index 03a2cfcc..a3b4f7aa 100644
--- a/qubes/backup.py
+++ b/qubes/backup.py
@@ -819,7 +819,8 @@ class Backup(object):
         # Save date of last backup, only when backup succeeded
         for qid, vm_info in files_to_backup.items():
             if vm_info.vm:
-                vm_info.vm.backup_timestamp = datetime.datetime.now()
+                vm_info.vm.backup_timestamp = \
+                    int(datetime.datetime.now().strftime('%s'))
 
         self.app.save()
 
diff --git a/qubes/tests/vm/qubesvm.py b/qubes/tests/vm/qubesvm.py
index e8637aad..14e4b933 100644
--- a/qubes/tests/vm/qubesvm.py
+++ b/qubes/tests/vm/qubesvm.py
@@ -513,12 +513,12 @@ class TC_90_QubesVM(QubesVMTestsMixin, qubes.tests.QubesTestCase):
         timestamp = datetime.datetime(2016, 1, 1, 12, 14, 2)
         timestamp_str = timestamp.strftime('%s')
         self.assertPropertyDefaultValue(vm, 'backup_timestamp', None)
-        self.assertPropertyValue(vm, 'backup_timestamp', timestamp,
-            timestamp, timestamp_str)
+        self.assertPropertyValue(vm, 'backup_timestamp', int(timestamp_str),
+            int(timestamp_str), timestamp_str)
         del vm.backup_timestamp
         self.assertPropertyDefaultValue(vm, 'backup_timestamp', None)
         self.assertPropertyValue(vm, 'backup_timestamp', timestamp_str,
-            timestamp)
+            int(timestamp_str))
 
     def test_401_backup_timestamp_invalid(self):
         vm = self.get_vm()
diff --git a/qubes/vm/qubesvm.py b/qubes/vm/qubesvm.py
index 6450b90d..1d73f7ec 100644
--- a/qubes/vm/qubesvm.py
+++ b/qubes/vm/qubesvm.py
@@ -24,7 +24,6 @@ from __future__ import absolute_import
 
 import asyncio
 import base64
-import datetime
 import errno
 import grp
 import os
@@ -100,6 +99,11 @@ def _setter_virt_mode(self, prop, value):
             "pvh mode can't be set if pci devices are attached")
     return value
 
+def _default_virt_mode(self):
+    if self.devices['pci'].persistent():
+        return 'hvm'
+    return 'pvh'
+
 
 class QubesVM(qubes.vm.mix.net.NetVMMixin, qubes.vm.BaseVM):
     '''Base functionality of Qubes VM shared between all VMs.
@@ -386,9 +390,9 @@ class QubesVM(qubes.vm.mix.net.NetVMMixin, qubes.vm.BaseVM):
 
     virt_mode = qubes.property('virt_mode',
         type=str, setter=_setter_virt_mode,
-        default='hvm',
+        default=_default_virt_mode,
         doc='''Virtualisation mode: full virtualisation ("hvm"),
-            or paravirtualisation ("pv")''')
+            or paravirtualisation ("pv"), or hybrid ("pvh")''')
 
     installed_by_rpm = qubes.property('installed_by_rpm',
         type=bool, setter=qubes.property.bool,
@@ -476,13 +480,9 @@ class QubesVM(qubes.vm.mix.net.NetVMMixin, qubes.vm.BaseVM):
         type=bool, setter=qubes.property.bool,
         doc='If this domain is to be included in default backup.')
 
-    # format got changed from %s to str(datetime.datetime)
     backup_timestamp = qubes.property('backup_timestamp', default=None,
-        setter=(lambda self, prop, value:
-            value if isinstance(value, datetime.datetime) else
-            datetime.datetime.fromtimestamp(int(value))),
-        saver=(lambda self, prop, value: value.strftime('%s')),
-        doc='FIXME')
+        type=int,
+        doc='Time of last backup of the qube, in seconds since unix epoch')
 
     default_dispvm = qubes.VMProperty('default_dispvm',
         load_stage=4,
@@ -1766,10 +1766,11 @@ class QubesVM(qubes.vm.mix.net.NetVMMixin, qubes.vm.BaseVM):
 
     # miscellanous
 
-    def get_start_time(self):
+    @qubes.stateless_property
+    def start_time(self):
         '''Tell when machine was started.
 
-        :rtype: datetime.datetime
+        :rtype: float or None
         '''
         if not self.is_running():
             return None
@@ -1778,7 +1779,7 @@ class QubesVM(qubes.vm.mix.net.NetVMMixin, qubes.vm.BaseVM):
         start_time = self.app.vmm.xs.read('',
             '/vm/{}/start_time'.format(self.uuid))
         if start_time != '':
-            return datetime.datetime.fromtimestamp(float(start_time))
+            return float(start_time)
 
         return None
 
diff --git a/rpm_spec/core-dom0.spec b/rpm_spec/core-dom0.spec
index 104cdf8b..e953ec94 100644
--- a/rpm_spec/core-dom0.spec
+++ b/rpm_spec/core-dom0.spec
@@ -216,6 +216,7 @@ fi
 
 %{_mandir}/man1/qrexec-policy-graph.1*
 %{_mandir}/man1/qubes*.1*
+%{_mandir}/man1/qvm-*.1*
 
 %dir %{python3_sitelib}/qubes-*.egg-info
 %{python3_sitelib}/qubes-*.egg-info/*