diff --git a/.pylintrc b/.pylintrc
index bd057eec..b438d897 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -57,10 +57,10 @@ const-rgx=(([A-Za-z_][A-Za-z0-9_]*)|(__.*__))$
 class-rgx=([A-Z_][a-zA-Z0-9]+|TC_\d\d_[a-zA-Z0-9_]+)$
 
 # Regular expression which should only match correct function names
-function-rgx=[a-z_][a-z0-9_]{2,30}$
+function-rgx=[a-z_][a-z0-9_]{2,40}$
 
 # Regular expression which should only match correct method names
-method-rgx=[a-z_][a-z0-9_]{2,30}$
+method-rgx=[a-z_][a-z0-9_]{2,40}$
 
 # Regular expression which should only match correct instance attribute names
 attr-rgx=[a-z_][a-z0-9_]{2,30}$
diff --git a/debian/control b/debian/control
index d3d1cd66..d8b13042 100644
--- a/debian/control
+++ b/debian/control
@@ -22,7 +22,7 @@ X-Python3-Version: >= 3.4
 Package: qubes-manager
 Architecture: any
 Depends:
-  python3-qubesadmin (>= 4.3.13),
+  python3-qubesadmin (>= 4.3.33),
   python3-qubesimgconverter,
   python3-pyqt6,
   python3-pyinotify,
diff --git a/qubesmanager/bootfromdevice.py b/qubesmanager/bootfromdevice.py
index 8f4c926b..17de964b 100644
--- a/qubesmanager/bootfromdevice.py
+++ b/qubesmanager/bootfromdevice.py
@@ -24,7 +24,7 @@
 from PyQt6 import QtWidgets, QtGui, QtCore  # pylint: disable=import-error
 from qubesadmin import tools
 from qubesadmin import exc
-from qubesadmin.tools import qvm_start
+from qubesadmin import utils as admin_utils
 
 # this is needed for icons to actually work
 # pylint: disable=unused-import, no-name-in-module
@@ -178,7 +178,7 @@ def main(args=None):
     window = utils.run_synchronous(
         functools.partial(VMBootFromDeviceWindow, vm))
     if window.result() == 1 and window.cdrom_location is not None:
-        qvm_start.main(['--cdrom', window.cdrom_location, vm.name])
+        admin_utils.start_expert(domain=vm, drive="cdrom:" + window.cdrom_location)
 
 if __name__ == "__main__":
     main()
diff --git a/qubesmanager/qube_manager.py b/qubesmanager/qube_manager.py
index 2fa1bb90..6f6164aa 100644
--- a/qubesmanager/qube_manager.py
+++ b/qubesmanager/qube_manager.py
@@ -31,7 +31,6 @@
 
 from qubesadmin import exc
 from qubesadmin import utils
-from qubesadmin.tools import qvm_start
 
 # pylint: disable=import-error
 from PyQt6 import QtWidgets
@@ -696,6 +695,20 @@ def run(self):
             self.msg = ("Error starting Qube!", str(ex))
 
 
+# pylint: disable=too-few-public-methods
+class ShutdownVMThread(common_threads.QubesThread):
+    def __init__(self, vm, force: bool = False, wait: bool = False):
+        super().__init__(vm)
+        self.force = force
+        self.wait_end = wait  # wait() is callable, let's not interfere.
+
+    def run(self):
+        try:
+            self.vm.shutdown(force=self.force, wait=self.wait_end)
+        except exc.QubesException as ex:
+            self.msg = ("Error starting Qube!", str(ex))
+
+
 # pylint: disable=too-few-public-methods
 class UpdateVMsThread(common_threads.QubesThread):
     def run(self):
@@ -1599,8 +1612,9 @@ def action_startvm_tools_install_triggered(self):
                     self.tr("'qubes-windows-tools' is not installed in dom0."))
         for vm_info in self.get_selected_vms():
             vm = vm_info.vm
-            qvm_start.main(['--cdrom',
-                'dom0:/usr/lib/qubes/qubes-windows-tools.iso', vm.name])
+            utils.start_expert(
+                domain=vm, drive="cdrom:dom0:/usr/lib/qubes/qubes-windows-tools.iso"
+            )
 
     @pyqtSlot(name='on_action_pausevm_triggered')
     def action_pausevm_triggered(self):
@@ -1660,9 +1674,15 @@ def shutdown_vm(self, vm, force=False, check_time=vm_restart_check_timeout,
 
                 force = True
                 for connected_vm in connected_vms:
-                    connected_vm.shutdown(force=force)
+                    thread = ShutdownVMThread(connected_vm, force=force)
+                    self.threads_list.append(thread)
+                    thread.finished.connect(self.clear_threads)
+                    thread.start()
 
-            vm.shutdown(force=force)
+            thread = ShutdownVMThread(vm, force=force, wait=True)
+            self.threads_list.append(thread)
+            thread.finished.connect(self.clear_threads)
+            thread.start()
         except exc.QubesException as ex:
             QMessageBox.warning(
                 self,
diff --git a/qubesmanager/settings.py b/qubesmanager/settings.py
index 6ea6ed2c..39f7b7ee 100644
--- a/qubesmanager/settings.py
+++ b/qubesmanager/settings.py
@@ -34,7 +34,6 @@
 from qubesadmin import device_protocol
 from qubesadmin.device_protocol import DeviceCategory
 from qubesadmin import utils as admin_utils
-from qubesadmin.tools import qvm_start
 import qubesadmin.exc
 
 from . import bootfromdevice
@@ -1393,7 +1392,9 @@ def boot_from_cdrom_button_pressed(self):
         )
         if boot_dialog.exec():
             self.save_and_apply()
-            qvm_start.main(["--cdrom", boot_dialog.cdrom_location, self.vm.name])
+            admin_utils.start_expert(
+                domain=self.vm, drive="cdrom:" + boot_dialog.cdrom_location
+            )
 
     def virt_mode_changed(self, new_idx):  # pylint: disable=unused-argument
         self.update_pv_warning()
diff --git a/qubesmanager/tests/test_qube_manager.py b/qubesmanager/tests/test_qube_manager.py
index 3ebac4cc..09632868 100644
--- a/qubesmanager/tests/test_qube_manager.py
+++ b/qubesmanager/tests/test_qube_manager.py
@@ -441,11 +441,13 @@ def test_209_shutdownvm(mock_monitor, mock_timer, _mock_question,
     assert qubes_manager.action_shutdownvm.isEnabled()
     vm = qubes_manager.qubes_app.domains['test-blue']
 
-    with mock.patch.object(vm, 'shutdown') as mock_shutdown:
-        qubes_manager.action_shutdownvm.trigger()
-        mock_shutdown.assert_called_once_with(force=False)
-        mock_monitor.assert_called_once_with(vm, mock.ANY, mock.ANY, mock.ANY)
-        mock_timer.assert_called_once_with(mock.ANY, mock.ANY)
+    expected_shutdown = ('test-blue', 'admin.vm.Shutdown', 'wait', None)
+    assert expected_shutdown not in qubes_manager.qubes_app.actual_calls
+    qubes_manager.qubes_app.expected_calls[expected_shutdown] = b'0\x00'
+
+    qubes_manager.action_shutdownvm.trigger()
+    mock_monitor.assert_called_once_with(vm, mock.ANY, mock.ANY, mock.ANY)
+    mock_timer.assert_called_once_with(mock.ANY, mock.ANY)
 
 
 def test_211_remove_adminvm(qubes_manager):
@@ -508,10 +510,12 @@ def test_214_restartvm(_msgbox, mock_monitor, _qtimer, qubes_manager):
     assert qubes_manager.action_restartvm.isEnabled()
     vm = qubes_manager.qubes_app.domains['test-blue']
 
-    with mock.patch.object(vm, 'shutdown') as mock_shutdown:
-        qubes_manager.action_restartvm.trigger()
-        mock_shutdown.assert_called_once_with(force=True)
-        mock_monitor.assert_called_once_with(vm, 1000, True, mock.ANY)
+    expected_shutdown = ('test-blue', 'admin.vm.Shutdown', 'force+wait', None)
+    assert expected_shutdown not in qubes_manager.qubes_app.actual_calls
+    qubes_manager.qubes_app.expected_calls[expected_shutdown] = b'0\x00'
+
+    qubes_manager.action_restartvm.trigger()
+    mock_monitor.assert_called_once_with(vm, 1000, True, mock.ANY)
 
 
 @mock.patch('qubesmanager.qube_manager.UpdateVMsThread')
@@ -1450,6 +1454,30 @@ def test_602_startvm_thread_error():
     assert thread.msg is not None
 
 
+def test_603_shutdownvm_thread():
+    vm = mock.Mock(spec=['shutdown'])
+
+    thread = qube_manager.ShutdownVMThread(vm)
+    thread.run()
+    vm.shutdown.assert_called_once_with(force=False, wait=False)
+    vm.shutdown.reset_mock()
+
+    thread = qube_manager.ShutdownVMThread(vm, force=True, wait=True)
+    thread.run()
+    vm.shutdown.assert_called_once_with(force=True, wait=True)
+
+
+def test_604_shutdownvm_thread_error():
+    vm = mock.Mock(
+        spec=['shutdown'],
+        **{'shutdown.side_effect': exc.QubesException('Error')})
+
+    thread = qube_manager.ShutdownVMThread(vm)
+    thread.run()
+
+    assert thread.msg is not None
+
+
 def test_610_run_command_thread():
     vm = mock.Mock(spec=['run'])
 
diff --git a/qubesmanager/tests/test_vm_settings.py b/qubesmanager/tests/test_vm_settings.py
index 64ae8f0b..1906f5f5 100644
--- a/qubesmanager/tests/test_vm_settings.py
+++ b/qubesmanager/tests/test_vm_settings.py
@@ -1101,7 +1101,7 @@ def test_211_virtmode(settings_fixture):
     assert expected_call in settings_window.qubesapp.actual_calls
 
 
-@mock.patch("qubesadmin.tools.qvm_start.main")
+@mock.patch("qubesadmin.utils.start_expert")
 @mock.patch("qubesmanager.bootfromdevice.VMBootFromDeviceWindow")
 @check_errors
 @pytest.mark.parametrize("settings_fixture", TEST_VMS, indirect=True)
@@ -1120,7 +1120,7 @@ def test_212_boot_from_device(mock_boot, mock_start, settings_fixture):
         parent=settings_window,
     )
 
-    mock_start.assert_called_with(["--cdrom", mock.ANY, vm.name])
+    mock_start.assert_called_with(domain=vm, drive=mock.ANY)
 
 
 @check_errors
diff --git a/rpm_spec/qmgr.spec.in b/rpm_spec/qmgr.spec.in
index dfae655c..753ba7e0 100644
--- a/rpm_spec/qmgr.spec.in
+++ b/rpm_spec/qmgr.spec.in
@@ -10,7 +10,7 @@ URL:		https://www.qubes-os.org
 Requires:	python%{python3_pkgversion}
 Requires:	python%{python3_pkgversion}-pyqt6
 Requires:	python%{python3_pkgversion}-inotify
-Requires:	python%{python3_pkgversion}-qubesadmin >= 4.3.13
+Requires:	python%{python3_pkgversion}-qubesadmin >= 4.3.33
 Requires:	python%{python3_pkgversion}-qubesimgconverter
 Requires:	python%{python3_pkgversion}-qasync
 Requires:	python%{python3_pkgversion}-pyxdg