1622987 - [Wayland] Cannot rearrange tabs with tablet pen

Status: UNCONFIRMED

(Core :: Widget: Gtk, defect, P3)

Description

[Tudor]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0

Steps to reproduce:

When tapping and dragging a tab with a tablet pen, the tab does not move when Firefox is running under Wayland. It does move when running under XWayland.

This is reproducible both on sway (master) and GNOME (latest in Debian Buster repository). mozregression showed this issue has been present since the first Wayland build triggered by GDK_BACKEND in early 2019.

evemu-describe output for my tablet device (a Huion 420).

There's a small issue in systemd where libwacom udev rules don't get properly applied when emulating via evemu-device. In /usr/lib/udev/rules.d/60-persistent-input.rules or similar, the following line is necessary:

ATTRS{name}=="* Pad", ENV{ID_INPUT_TABLET_PAD}="1"

Actual results:

Tabs move when dragged with the tablet pen, as they do under X11.

Expected results:

Tabs cannot be rearranged with tablet pen input.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

[Tudor]

After a bit more testing, I suppose a more accurate description is that drag events do not work in general, not just in tabs -- I can't drag any text selections in web pages, either.

Comment 3

[Firefox Bug Husbandry Bot]

Because this bug's Severity has not been changed from the default since it was filed, and it's Priority is P3 (Backlog,) indicating it has been triaged, the bug's Severity is being updated to S3 (normal.)