Unable to regain control over mouse with libvirt's remote-viewer

[GrabbenD]

• Sway Version:

  • 1.9

• Debug Log:
  Here's relevant logs after the last step in reproducible example from below:

  $ sway -d
  (...)
  00:03:47.113 [DEBUG] [sway/desktop/transaction.c:398] Transaction 0x57aacecf4220 committing with 4 instructions
  00:03:47.113 [DEBUG] [sway/desktop/transaction.c:294] Applying transaction 0x57aacecf4220
  00:03:48.747 [DEBUG] [sway/desktop/transaction.c:398] Transaction 0x57aaceb4c900 committing with 4 instructions
  00:03:48.747 [DEBUG] [sway/desktop/transaction.c:294] Applying transaction 0x57aaceb4c900
  00:03:49.218 [DEBUG] [wlr] [types/wlr_compositor.c:692] New wlr_surface 0x57aacecfbe50 (res 0x57aacece0500)
  00:03:49.218 [DEBUG] [wlr] [types/wlr_compositor.c:692] New wlr_surface 0x57aacecdcfe0 (res 0x57aacecdd390)
  00:03:49.256 [DEBUG] [wlr] [types/wlr_compositor.c:692] New wlr_surface 0x57aacecd8db0 (res 0x57aacecd9160)
  00:03:49.256 [DEBUG] [wlr] [types/wlr_compositor.c:692] New wlr_surface 0x57aacecfb660 (res 0x57aacecfba10)
  00:03:49.256 [DEBUG] [wlr] [types/wlr_compositor.c:692] New wlr_surface 0x57aacecdfa40 (res 0x57aacecdfdf0)
  00:03:49.256 [DEBUG] [wlr] [types/wlr_compositor.c:692] New wlr_surface 0x57aacecbb7e0 (res 0x57aacecbbb90)
  00:03:49.256 [DEBUG] [wlr] [types/xdg_shell/wlr_xdg_surface.c:388] new xdg_surface 0x57aaceceee80 (res 0x57aacecd9250)
  00:03:49.256 [DEBUG] [sway/desktop/xdg_shell.c:530] New xdg_shell toplevel title='spice://localhost:3001 (1)' app_id='remote-viewer'
  00:03:49.256 [DEBUG] [wlr] [types/wlr_server_decoration.c:104] new server_decoration 0x57aacecf1e60 (res 0x57aacecd3740)
  00:03:49.277 [DEBUG] [sway/tree/view.c:421] View 0x57aaced07500 updated CSD to 1
  00:03:49.277 [DEBUG] [sway/tree/arrange.c:263] Usable area for ws: 3840x1600@0,0
  00:03:49.277 [DEBUG] [sway/tree/arrange.c:297] Arranging workspace '1' at 2.000000, 2.000000
  00:03:49.277 [DEBUG] [sway/tree/arrange.c:77] Arranging 0x7ffec30c9450 horizontally
  00:03:49.277 [DEBUG] [sway/desktop/transaction.c:398] Transaction 0x57aaceb4c900 committing with 7 instructions
  00:03:49.279 [DEBUG] [wlr] [types/wlr_compositor.c:692] New wlr_surface 0x57aaced05440 (res 0x57aaced057f0)
  00:03:49.279 [DEBUG] [wlr] [types/wlr_compositor.c:692] New wlr_surface 0x57aacecfd120 (res 0x57aacecfd4d0)
  00:03:49.289 [DEBUG] [sway/desktop/transaction.c:494] Transaction 0x57aaceb4c900 is ready
  00:03:49.289 [DEBUG] [sway/desktop/transaction.c:294] Applying transaction 0x57aaceb4c900
  00:03:49.289 [DEBUG] [sway/tree/container.c:1320] Container 0x57aacecdd660 entered output 0x57aacea71400
  00:03:49.290 [DEBUG] [sway/input/input-manager.c:335] Adding keyboard shortcuts inhibitor
  00:03:49.944 [DEBUG] [wlr] [types/wlr_pointer_constraints_v1.c:252] new locked_pointer 0x57aacecfe380 (res 0x57aacecd8b40)
  00:03:49.944 [DEBUG] [wlr] [types/wlr_pointer_constraints_v1.c:352] constrained 0x57aacecfe380
  00:03:52.655 [DEBUG] [sway/input/input-manager.c:320] Removing keyboard shortcuts inhibitor
  00:03:57.040 [DEBUG] [sway/ipc-server.c:354] Sending bar_state_update event
  00:03:57.040 [DEBUG] [wlr] [types/wlr_layer_shell_v1.c:466] new layer_surface 0x57aaced04b80 (res 0x57aacecbc9e0)
  00:03:57.040 [DEBUG] [sway/desktop/layer_shell.c:646] new layer surface: namespace panel layer 3 anchor 13 size 0x30 margin 0,0,0,0,
  00:03:57.223 [DEBUG] [sway/commands/bind.c:619] running command for binding: workspace next

  I'm only able to regain control by switching workplace and executing: $ killall remote-viewer

• Configuration File:
  Default

• Description:

  • virt-viewer (11.0-2)'s remote-viewer wont release the mouse lock with SPICE protocol despite using Shift + F12 (which only releases the keyboard).
  • Only reproducible during ISO installation of Arch Linux (meaning not in VT0/TTY)

• Minimal reproducible example:

  # ARCH LINUX
  
  # SERVER
  $ sudo pacman --sync --needed qemu-base qemu-chardev-spice qemu-hw-usb-redirect qemu-hw-display-virtio-vga qemu-hw-display-virtio-gpu
  $ sudo wget https://geo.mirror.pkgbuild.com/iso/latest/archlinux-x86_64.iso
  $ sudo qemu-system-x86_64 \
    -name archlinux \
    -machine q35 \
    -enable-kvm \
    -cpu max \
    -smp 4 \
    -m 16G \
    -drive format=raw,media=cdrom,readonly=on,file=archlinux-x86_64.iso \
    -spice port=3001,disable-ticketing=on
  
  # CLIENT
  $ sudo pacman --sync --needed virt-viewer
  $ remote-viewer spice://localhost:3001

  
  Captured with bindsym --no-repeat --inhibited PRINT exec flameshot gui

  "(Press Shift+F12 to release pointer)" doesn't work here unlike virt-manager

[GrabbenD]

Workaround 1

Use --inhibited to disable pass-through of predefined bindsym in conjunction with mouse_warping to automatically move cursor to focused window:

# Move cursor to focused window
mouse_warping container

# Move focus
bindsym --no-repeat --inhibited $KEY_MOD+LEFT focus left
bindsym --no-repeat --inhibited $KEY_MOD+DOWN focus down
bindsym --no-repeat --inhibited $KEY_MOD+UP focus up
bindsym --no-repeat --inhibited $KEY_MOD+RIGHT focus right

[emersion]

Seems like a client issue. The client constrains the pointer (00:03:49.944 [DEBUG] [wlr] [types/wlr_pointer_constraints_v1.c:352] constrained 0x57aacecfe380) but doesn't unconstrain it when Shift+F12 is pressed.

[emersion]

Note, we have a seat <name> pointer_constraint enable|disable|escape command.

[GrabbenD]

You're a lifesaver @emersion 😄
Thanks for the proper workaround!

• Strangely escape doesn't re-engage mouse lock when I click on the remote-viewer window again unless I first click on a different window and then on remote-viewer (which is also reproducible when using 2 keybindings instead of escape, one for enable & another for disable)

• I've reported this issue upstream: https://gitlab.com/virt-viewer/virt-viewer/-/issues/140

Workaround 2

bindsym --no-repeat --inhibited $KEY_MOD+X seat * pointer_constraint escape