Source code for libqtile.backend.wayland.core

# Copyright (c) 2021 Matt Colligan
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.

from __future__ import annotations

import asyncio
import os
import time
import typing

import wlroots.helper as wlroots_helper
from pywayland import lib
from pywayland.protocol.wayland import WlSeat
from pywayland.server import Display
from wlroots import xwayland
from wlroots.wlr_types import (
from wlroots.wlr_types.cursor import WarpMode
from wlroots.wlr_types.layer_shell_v1 import LayerShellV1, LayerShellV1Layer, LayerSurfaceV1
from wlroots.wlr_types.output_management_v1 import (
from wlroots.wlr_types.pointer_constraints_v1 import PointerConstraintsV1, PointerConstraintV1
from wlroots.wlr_types.server_decoration import (
from wlroots.wlr_types.virtual_keyboard_v1 import VirtualKeyboardManagerV1, VirtualKeyboardV1
from wlroots.wlr_types.xdg_shell import XdgShell, XdgSurface, XdgSurfaceRole
from xkbcommon import xkb

from libqtile import hook
from libqtile.backend import base
from libqtile.backend.wayland import keyboard, window, wlrq
from libqtile.backend.wayland.output import Output
from libqtile.log_utils import logger

if typing.TYPE_CHECKING:
    from typing import Dict, List, Optional, Sequence, Set, Tuple, Union

    from wlroots.wlr_types import Output as wlrOutput
    from wlroots.wlr_types.data_device_manager import Drag

    from libqtile import config
    from libqtile.core.manager import Qtile

[docs]class Core(base.Core, wlrq.HasListeners): supports_restarting: bool = False def __init__(self): """Setup the Wayland core backend""" self.qtile: Optional[Qtile] = None self.desktops: int = 1 self.current_desktop: int = 0 self._hovered_internal: Optional[window.Internal] = None self.focused_internal: Optional[window.Internal] = None self.fd = None self.display = Display() self.event_loop = self.display.get_event_loop() ( self.compositor, self._allocator, self.renderer, self.backend, ) = wlroots_helper.build_compositor(self.display) self.socket = self.display.add_socket() os.environ["WAYLAND_DISPLAY"] = self.socket.decode()"Starting core with WAYLAND_DISPLAY=" + self.socket.decode()) # These windows have not been mapped yet; they'll get managed when mapped self.pending_windows: List[window.WindowType] = [] # mapped_windows contains just regular windows self.mapped_windows: List[window.WindowType] = [] # Ascending in Z # stacked_windows also contains layer_shell windows from the current output self.stacked_windows: Sequence[window.WindowType] = [] # Ascending in Z self._current_output: Optional[Output] = None # set up inputs self.keyboards: List[keyboard.Keyboard] = [] self.grabbed_keys: List[Tuple[int, int]] = [] self.grabbed_buttons: List[Tuple[int, int]] = [] DataDeviceManager(self.display) self.live_dnd: Optional[wlrq.Dnd] = None DataControlManagerV1(self.display) = seat.Seat(self.display, "seat0") self.add_listener(, self._on_request_set_selection) self.add_listener(, self._on_request_start_drag) self.add_listener(, self._on_start_drag) self.add_listener(self.backend.new_input_event, self._on_new_input) # set up outputs self.outputs: List[Output] = [] self.add_listener(self.backend.new_output_event, self._on_new_output) self.output_layout = OutputLayout() self.add_listener(self.output_layout.change_event, self._on_output_layout_change) self.output_manager = OutputManagerV1(self.display) self.add_listener(self.output_manager.apply_event, self._on_output_manager_apply) self.add_listener(self.output_manager.test_event, self._on_output_manager_test) # set up cursor self.cursor = Cursor(self.output_layout) self.cursor_manager = XCursorManager(24) self.add_listener(, self._on_request_cursor) self.add_listener(self.cursor.axis_event, self._on_cursor_axis) self.add_listener(self.cursor.frame_event, self._on_cursor_frame) self.add_listener(self.cursor.button_event, self._on_cursor_button) self.add_listener(self.cursor.motion_event, self._on_cursor_motion) self.add_listener(self.cursor.motion_absolute_event, self._on_cursor_motion_absolute) # set up shell self.xdg_shell = XdgShell(self.display) self.add_listener(self.xdg_shell.new_surface_event, self._on_new_xdg_surface) self.layer_shell = LayerShellV1(self.display) self.add_listener(self.layer_shell.new_surface_event, self._on_new_layer_surface) # Add support for additional protocols XdgOutputManagerV1(self.display, self.output_layout) ScreencopyManagerV1(self.display) GammaControlManagerV1(self.display) PrimarySelectionV1DeviceManager(self.display) self._virtual_keyboard_manager_v1 = VirtualKeyboardManagerV1(self.display) self.add_listener( self._virtual_keyboard_manager_v1.new_virtual_keyboard_event, self._on_new_virtual_keyboard, ) xdg_decoration_manager_v1 = xdg_decoration_v1.XdgDecorationManagerV1.create(self.display) self.add_listener( xdg_decoration_manager_v1.new_toplevel_decoration_event, self._on_new_toplevel_decoration, ) # wlr_server_decoration will be removed in a future version of wlroots server_decoration_manager = ServerDecorationManager.create(self.display) server_decoration_manager.set_default_mode(ServerDecorationManagerMode.SERVER) pointer_constraints_v1 = PointerConstraintsV1(self.display) self.add_listener( pointer_constraints_v1.new_constraint_event, self._on_new_pointer_constraint, ) self.pointer_constraints: Set[wlrq.PointerConstraint] = set() self.active_pointer_constraint: Optional[wlrq.PointerConstraint] = None self._relative_pointer_manager_v1 = RelativePointerManagerV1(self.display) self.foreign_toplevel_manager_v1 = ForeignToplevelManagerV1.create(self.display) # Set up XWayland self._xwayland = xwayland.XWayland(self.display, self.compositor, True) if self._xwayland: os.environ["DISPLAY"] = self._xwayland.display_name"Set up XWayland with DISPLAY=" + os.environ["DISPLAY"]) self.add_listener(self._xwayland.ready_event, self._on_xwayland_ready) self.add_listener(self._xwayland.new_surface_event, self._on_xwayland_new_surface) else:"Failed to set up XWayland. Continuing without.") # Start self.backend.start() @property def name(self): return "wayland" def finalize(self): for kb in self.keyboards: kb.finalize() for out in self.outputs: out.finalize() self.finalize_listeners() if self._xwayland: self._xwayland.destroy() self.cursor_manager.destroy() self.cursor.destroy() self.output_layout.destroy() self.backend.destroy() self.display.destroy() self.qtile = None @property def display_name(self) -> str: return self.socket.decode() def _on_request_set_selection(self, _listener, event: seat.RequestSetSelectionEvent):, event.serial) logger.debug("Signal: seat request_set_selection") def _on_request_start_drag(self, _listener, event: seat.RequestStartDragEvent): logger.debug("Signal: seat request_start_drag") if not self.live_dnd and event.origin, event.serial ):, event.serial) else: event.drag.source.destroy() def _on_start_drag(self, _listener, event: Drag): logger.debug("Signal: seat start_drag") self.live_dnd = wlrq.Dnd(self, event) def _on_new_input(self, _listener, device: input_device.InputDevice): logger.debug("Signal: backend new_input_event") if device.device_type == input_device.InputDeviceType.POINTER: self._add_new_pointer(device) elif device.device_type == input_device.InputDeviceType.KEYBOARD: self._add_new_keyboard(device) capabilities = WlSeat.capability.pointer if len(self.keyboards) > 0: capabilities |= WlSeat.capability.keyboard"New input: " + str(device.device_type))"Input capabilities: " + str(capabilities)) def _on_new_output(self, _listener, wlr_output: wlrOutput): logger.debug("Signal: backend new_output_event") wlr_output.init_render(self._allocator, self.renderer) if wlr_output.modes != []: mode = wlr_output.preferred_mode() if mode is None: logger.error("New output has no output mode") return wlr_output.set_mode(mode) wlr_output.enable() wlr_output.commit() self.outputs.append(Output(self, wlr_output)) # Put new output at far right layout_geo = self.output_layout.get_box() self.output_layout.add(wlr_output, layout_geo.width, 0) if not self._current_output: self._current_output = self.outputs[0] def _on_output_layout_change(self, _listener, _data): logger.debug("Signal: output_layout change_event") config = OutputConfigurationV1() for output in self.outputs: box = self.output_layout.get_box(output.wlr_output) head = OutputConfigurationHeadV1.create(config, output.wlr_output) head.state.x = output.x = box.x head.state.y = output.y = box.y head.state.enabled = output.wlr_output.enabled head.state.mode = output.wlr_output.current_mode self.output_manager.set_configuration(config) self.outputs.sort(key=lambda o: (o.x, o.y)) def _on_output_manager_apply(self, _listener, config: OutputConfigurationV1): logger.debug("Signal: output_manager apply_event") self._output_manager_reconfigure(config, True) def _on_output_manager_test(self, _listener, config: OutputConfigurationV1): logger.debug("Signal: output_manager test_event") self._output_manager_reconfigure(config, False) def _on_request_cursor(self, _listener, event: seat.PointerRequestSetCursorEvent): logger.debug("Signal: seat request_set_cursor_event") self.cursor.set_surface(event.surface, event.hotspot) def _on_new_xdg_surface(self, _listener, surface: XdgSurface): logger.debug("Signal: xdg_shell new_surface_event") if surface.role == XdgSurfaceRole.TOPLEVEL: assert self.qtile is not None win = window.Window(self, self.qtile, surface) self.pending_windows.append(win) def _on_cursor_axis(self, _listener, event: pointer.PointerEventAxis): handled = False if != 0: if event.orientation == pointer.AxisOrientation.VERTICAL: button = 5 if 0 < else 4 else: button = 7 if 0 < else 6 handled = self._process_cursor_button(button, True) if not handled: event.time_msec, event.orientation,, event.delta_discrete, event.source, ) def _on_cursor_frame(self, _listener, _data): def _on_cursor_button(self, _listener, event: pointer.PointerEventButton): assert self.qtile is not None pressed = event.button_state == input_device.ButtonState.PRESSED if pressed: self._focus_by_click() handled = False if event.button in wlrq.buttons: button = wlrq.buttons.index(event.button) + 1 handled = self._process_cursor_button(button, pressed) if not handled:, event.button, event.button_state) def _on_cursor_motion(self, _listener, event: pointer.PointerEventMotion): assert self.qtile is not None dx = event.delta_x dy = event.delta_y # Send relative pointer events to seat - used e.g. by games that have # constrained cursor movement but want movement events self._relative_pointer_manager_v1.send_relative_motion(, event.time_msec * 1000, dx, dy, event.unaccel_delta_x, event.unaccel_delta_y, ) if self.active_pointer_constraint: if not self.active_pointer_constraint.rect.contains_point( self.cursor.x + dx, self.cursor.y + dy ): return self.cursor.move(dx, dy, input_device=event.device) self._process_cursor_motion(event.time_msec, self.cursor.x, self.cursor.y) def _on_cursor_motion_absolute(self, _listener, event: pointer.PointerEventMotionAbsolute): assert self.qtile is not None self.cursor.warp( WarpMode.AbsoluteClosest, event.x, event.y, input_device=event.device, ) self._process_cursor_motion(event.time_msec, self.cursor.x, self.cursor.y) def _on_new_pointer_constraint(self, _listener, wlr_constraint: PointerConstraintV1): logger.debug("Signal: pointer_constraints new_constraint") constraint = wlrq.PointerConstraint(self, wlr_constraint) self.pointer_constraints.add(constraint) if == wlr_constraint.surface: if self.active_pointer_constraint: self.active_pointer_constraint.disable() constraint.enable() def _on_new_virtual_keyboard(self, _listener, virtual_keyboard: VirtualKeyboardV1): self._add_new_keyboard(virtual_keyboard.input_device) def _on_new_layer_surface(self, _listener, layer_surface: LayerSurfaceV1): logger.debug("Signal: layer_shell new_surface_event") assert self.qtile is not None wid = self.new_wid() win = window.Static(self, self.qtile, layer_surface, wid)"Managing new layer_shell window with window ID: {wid}") self.qtile.manage(win) def _on_new_toplevel_decoration( self, _listener, decoration: xdg_decoration_v1.XdgToplevelDecorationV1 ): logger.debug("Signal: xdg_decoration new_top_level_decoration") decoration.set_mode(xdg_decoration_v1.XdgToplevelDecorationV1Mode.SERVER_SIDE) def _on_xwayland_ready(self, _listener, _data): logger.debug("Signal: xwayland ready") assert self._xwayland is not None self._xwayland.set_seat( self.xwayland_atoms: Dict[int, str] = wlrq.get_xwayland_atoms(self._xwayland) def _on_xwayland_new_surface(self, _listener, surface: xwayland.Surface): logger.debug("Signal: xwayland new_surface") assert self.qtile is not None win = window.XWindow(self, self.qtile, surface) self.pending_windows.append(win) def _output_manager_reconfigure(self, config: OutputConfigurationV1, apply: bool) -> None: """ See if an output configuration would be accepted by the backend, and apply it if desired. """ ok = True for head in config.heads: state = head.state wlr_output = state.output if state.enabled: wlr_output.enable() if state.mode: wlr_output.set_mode(state.mode) else: wlr_output.set_custom_mode( state.custom_mode.width, state.custom_mode.height, state.custom_mode.refresh, ) self.output_layout.move(wlr_output, state.x, state.y) wlr_output.set_transform(state.transform) wlr_output.set_scale(state.scale) else: wlr_output.enable(enable=False) ok = wlr_output.test() if not ok: break for head in config.heads: if ok and apply: head.state.output.commit() else: head.state.output.rollback() if ok: config.send_succeeded() else: config.send_failed() config.destroy()"screen_change", None) def _process_cursor_motion(self, time_msec: int, cx: float, cy: float): assert self.qtile cx_int = int(cx) cy_int = int(cy) self.qtile.process_button_motion(cx_int, cy_int) if len(self.outputs) > 1: current_output = self.output_layout.output_at(cx, cy).data if self._current_output is not current_output: self._current_output = current_output self.stack_windows() if self.live_dnd: self.live_dnd.position(cx, cy) found = self._under_pointer() if found: win, surface, sx, sy = found if isinstance(win, window.Internal): if self._hovered_internal is win: win.process_pointer_motion( cx_int - self._hovered_internal.x, cy_int - self._hovered_internal.y, ) else: if self._hovered_internal: self._hovered_internal.process_pointer_leave( cx_int - self._hovered_internal.x, cy_int - self._hovered_internal.y, ) self.cursor_manager.set_cursor_image("left_ptr", self.cursor) win.process_pointer_enter(cx_int, cy_int) self._hovered_internal = win return if surface:, sx, sy), sx, sy) else: if win is not self.qtile.current_window:"client_mouse_enter", win) if self.qtile.config.follow_mouse_focus: if isinstance(win, window.Static): self.qtile.focus_screen(win.screen.index, False) else: if != win:, False) if and self.qtile.current_screen != self.qtile.focus_screen(, False) if self._hovered_internal: self._hovered_internal = None else: self.cursor_manager.set_cursor_image("left_ptr", self.cursor) if self._hovered_internal: self._hovered_internal.process_pointer_leave( cx_int - self._hovered_internal.x, cy_int - self._hovered_internal.y, ) self._hovered_internal = None def _process_cursor_button(self, button: int, pressed: bool) -> bool: assert self.qtile is not None if pressed: handled = self.qtile.process_button_click( button,, int(self.cursor.x), int(self.cursor.y) ) if self._hovered_internal: self._hovered_internal.process_button_click( self.cursor.x - self._hovered_internal.x, self.cursor.y - self._hovered_internal.y, button, ) else: handled = self.qtile.process_button_release(button, if self._hovered_internal: self._hovered_internal.process_button_release( self.cursor.x - self._hovered_internal.x, self.cursor.y - self._hovered_internal.y, button, ) return handled def _add_new_pointer(self, device: input_device.InputDevice):"Adding new pointer") self.cursor.attach_input_device(device) def _add_new_keyboard(self, device: input_device.InputDevice):"Adding new keyboard") self.keyboards.append(keyboard.Keyboard(self, device)) def setup_listener(self, qtile: Qtile) -> None: """Setup a listener for the given qtile instance""" logger.debug("Adding io watch") self.qtile = qtile self.fd = lib.wl_event_loop_get_fd(self.event_loop._ptr) asyncio.get_running_loop().add_reader(self.fd, self._poll) def remove_listener(self) -> None: """Remove the listener from the given event loop""" if self.fd is not None: logger.debug("Removing io watch") loop = asyncio.get_running_loop() loop.remove_reader(self.fd) self.fd = None def _poll(self) -> None: if not self.display.destroyed: self.display.flush_clients() self.event_loop.dispatch(0) self.display.flush_clients() def distribute_windows(self, initial: bool) -> None: if initial: # This backend does not support restarting return assert self.qtile is not None for win in self.qtile.windows_map.values(): if isinstance(win, (window.Internal, window.Static)): continue group = None assert isinstance(win, window.Window) if if in self.qtile.groups_map: # Put window on group with same name as its old group if one exists group = self.qtile.groups_map[] else: # Otherwise place it on the group at the same index for i, old_group in self.qtile._state.groups: # type: ignore if i < len(self.qtile.groups): name = old_group[0] if == name: group = self.qtile.groups[i] if group is None: # Falling back to current group if none found group = self.qtile.current_group if and win in # It might not be in depending on how group state # changed across a config reload group.add(win) if group == self.qtile.current_group: win.unhide() else: win.hide() def new_wid(self) -> int: """Get a new unique window ID""" assert self.qtile is not None return max(self.qtile.windows_map.keys(), default=0) + 1 def focus_window( self, win: window.WindowType, surface: Surface = None, enter: bool = True ) -> None: if return if surface is None and win is not None: if isinstance(win, base.Internal): self.focused_internal = win return surface = win.surface.surface if self.focused_internal: self.focused_internal = None if isinstance(win.surface, LayerSurfaceV1): if not win.surface.current.keyboard_interactive: return if isinstance(win.surface, xwayland.Surface): if not win.surface.or_surface_wants_focus(): return previous_surface = if previous_surface == surface: return if previous_surface is not None: # Deactivate the previously focused surface if previous_surface.is_xdg_surface: previous_xdg_surface = XdgSurface.from_surface(previous_surface) if not win or win.surface != previous_xdg_surface: previous_xdg_surface.set_activated(False) if elif previous_surface.is_xwayland_surface: prev_xwayland_surface = xwayland.Surface.from_wlr_surface(previous_surface) if not win or win.surface != prev_xwayland_surface: prev_xwayland_surface.activate(False) if if not win: return logger.debug("Focussing new window") if surface.is_xdg_surface and isinstance(win.surface, XdgSurface): win.surface.set_activated(True) win.ftm_handle.set_activated(True) elif surface.is_xwayland_surface and isinstance(win.surface, xwayland.Surface): win.surface.activate(True) win.ftm_handle.set_activated(True) if enter and # This pointer is NULL when headless, def _focus_by_click(self) -> None: assert self.qtile is not None found = self._under_pointer() if found: win, surface, _, _ = found if self.qtile.config.bring_front_click is True: win.cmd_bring_to_front() elif self.qtile.config.bring_front_click == "floating_only": if not isinstance(win, base.Internal) and win.floating: win.cmd_bring_to_front() if not isinstance(win, base.Internal): if isinstance(win, window.Static): if win.screen is not self.qtile.current_screen: self.qtile.focus_screen(win.screen.index, warp=False) win.focus(False) else: if and is not self.qtile.current_screen: self.qtile.focus_screen(, warp=False) self.qtile.current_group.focus(win, False) else: screen = self.qtile.find_screen(self.cursor.x, self.cursor.y) if screen: self.qtile.focus_screen(screen.index, warp=False) def _under_pointer(self): assert self.qtile is not None cx = self.cursor.x cy = self.cursor.y for win in reversed(self.stacked_windows): if isinstance(win, window.Internal): if win.x <= cx <= win.x + win.width and win.y <= cy <= win.y + win.height: return win, None, 0, 0 else: bw = win.borderwidth surface, sx, sy = win.surface.surface_at(cx - win.x - bw, cy - win.y - bw) if surface: return win, surface, sx, sy if bw: if win.x <= cx and win.y <= cy: bw *= 2 if cx <= win.x + win.width + bw and cy <= win.y + win.height + bw: return win, None, 0, 0 return None def stack_windows(self) -> None: """Put all windows of all types in a Z-ordered list.""" if self._current_output: layers = self._current_output.layers self.stacked_windows = ( layers[LayerShellV1Layer.BACKGROUND] + layers[LayerShellV1Layer.BOTTOM] + self.mapped_windows # type: ignore + layers[LayerShellV1Layer.TOP] + layers[LayerShellV1Layer.OVERLAY] ) else: self.stacked_windows = self.mapped_windows def get_screen_info(self) -> List[Tuple[int, int, int, int]]: """Get the screen information""" return [screen.get_geometry() for screen in self.outputs if screen.wlr_output.enabled] def grab_key(self, key: Union[config.Key, config.KeyChord]) -> Tuple[int, int]: """Configure the backend to grab the key event""" keysym = xkb.keysym_from_name(key.key, case_insensitive=True) mask_key = wlrq.translate_masks(key.modifiers) self.grabbed_keys.append((keysym, mask_key)) return keysym, mask_key def ungrab_key(self, key: Union[config.Key, config.KeyChord]) -> Tuple[int, int]: """Release the given key event""" keysym = xkb.keysym_from_name(key.key, case_insensitive=True) mask_key = wlrq.translate_masks(key.modifiers) self.grabbed_keys.remove((keysym, mask_key)) return keysym, mask_key def ungrab_keys(self) -> None: """Release the grabbed key events""" self.grabbed_keys.clear() def grab_button(self, mouse: config.Mouse) -> int: """Configure the backend to grab the mouse event""" keysym = wlrq.buttons[mouse.button_code] mask_key = wlrq.translate_masks(mouse.modifiers) self.grabbed_buttons.append((keysym, mask_key)) return mask_key def ungrab_buttons(self) -> None: """Release the grabbed button events""" self.grabbed_buttons.clear() def grab_pointer(self) -> None: """Configure the backend to grab mouse events""" def ungrab_pointer(self) -> None: """Release grabbed pointer events""" def warp_pointer(self, x: int, y: int) -> None: """Warp the pointer to the coordinates in relative to the output layout""" self.cursor.warp(WarpMode.LayoutClosest, x, y) def flush(self) -> None: self._poll() def create_internal(self, x: int, y: int, width: int, height: int) -> base.Internal: assert self.qtile is not None internal = window.Internal(self, self.qtile, x, y, width, height) self.qtile.manage(internal) return internal def graceful_shutdown(self): """Try to close windows gracefully before exiting""" assert self.qtile is not None # Copy in case the dictionary changes during the loop for win in self.qtile.windows_map.copy().values(): win.kill() # give everyone a little time to exit and write their state. but don't # sleep forever (1s). end = time.time() + 1 while time.time() < end: self._poll() if not self.qtile.windows_map: break @property def painter(self): return wlrq.Painter(self) def output_from_wlr_output(self, wlr_output: wlrOutput) -> Output: matched = [] for output in self.outputs: if output.wlr_output == wlr_output: matched.append(output) assert len(matched) == 1 return matched[0] def keysym_from_name(self, name: str) -> int: """Get the keysym for a key from its name""" return xkb.keysym_from_name(name, case_insensitive=True) def simulate_keypress(self, modifiers: List[str], key: str) -> None: """Simulates a keypress on the focused window.""" keysym = xkb.keysym_from_name(key, case_insensitive=True) mods = wlrq.translate_masks(modifiers) if (keysym, mods) in self.grabbed_keys: assert self.qtile is not None self.qtile.process_key_event(keysym, mods) return if self.focused_internal: self.focused_internal.process_key_press(keysym)
[docs] def cmd_set_keymap( self, layout: Optional[str] = None, options: Optional[str] = None, variant: Optional[str] = None, ) -> None: """ Set the keymap for the current keyboard. The options correspond to xkbcommon configuration environmental variables and if not specified are taken from the environment. Acceptable values are strings identical to those accepted by the env variables. """ if self.keyboards: self.keyboards[-1].set_keymap(layout, options, variant) else: logger.warning("Could not set keymap: no keyboards set up.")
[docs] def cmd_change_vt(self, vt: int) -> bool: """Change virtual terminal to that specified""" success = self.backend.get_session().change_vt(vt) if not success: logger.warning(f"Could not change VT to: {vt}") return success