Wheel-scrolling over remote assistance breaks input

[Saviq]

With Frame from edge, or edge/mir-pr2566, and edge -VNC:

WAYLAND_DISPLAY=wayland-99 ubuntu-frame --add-wayland-extensions \
    zwlr_virtual_pointer_manager_v1:zwp_relative_pointer_manager_v1:zwp_virtual_keyboard_manager_v1 &
WAYLAND_DISPLAY=wayland-99 wpe-webkit-mir-kiosk.cog

In a separate shell (because of #2571)

WAYLAND_DISPLAY=wayland-99 ubuntu-frame-vnc

Connect a VNC client and scroll your mouse wheel "through" it.

The client complains:

interface 'wl_pointer' has no event 9

And input stops working.

[AlanGriffiths]

OK, so "event 9" is axis_value120 - i.e. Mir is sending wl_resource_post_event(resource, Opcode::axis_value120, ...) when the client doesn't expect it.

But all the Mir code I see gates this on wl_resource_get_version(resource) >= 8 - which (modulo hard coded numbers) should be correct.

[AlanGriffiths]

This looks like a problem with wpe-webkit-mir-kiosk: it is negotiating wl_seat version 8 - which includes support for axis_value120, and then when it receives axis_value120 it complains. I'd expect the same behaviour without VNC, but prior to #2566 we were not sending the correct axis_value120 events on modern libinput.

[AlanGriffiths]

Confirmed that this also affects HW input (with Mir dev, which now includes #2566).

[AlanGriffiths]

With GNOME, is only offered at wl_seat at 5. But webkit doesn't display anyway

[AlanGriffiths]

Reported against the wpe-webkit snap: https://gitlab.com/glancr/wpe-webkit-snap/-/issues/38