Public bug reported:
[ Impact ]
A touchscreen input sequence is supposed to "grab" onto the window where
the action started, so that even when moving the finger outside of the
window updates are still sent to it. Instead, as the finger leaves the
surface of the window, that stops receiving all touch updates and does
not even receive a finish event.
[ Test Case ]
1. Open the Nautilus file manager
2. Navigate to a directory with many files
3. Switch to the vertical "List View"
4. Start scrolling with the touchscreen
5. While scrolling, let the finger leave the surface of the window to its right
7. Verify that Nautilus keeps scrolling even with the finger outside the window
[ Where problems could occur ]
mutter is the Wayland compositor library that provides graphics and inputs for
the GNOME desktop, thus is a critical component.
Problems could manifest with touch input not working anymore, or sudden log-out
if gnome-shell crashes.
The change is limited to touchscreen handling, and won't ever affect a system
without touchscreen.
** Affects: mutter (Ubuntu)
Importance: Medium
Assignee: Alessandro Astone (aleasto)
Status: In Progress
** Affects: mutter (Ubuntu Oracular)
Importance: Medium
Assignee: Alessandro Astone (aleasto)
Status: In Progress
** Also affects: mutter (Ubuntu Oracular)
Importance: Undecided
Status: New
** Changed in: mutter (Ubuntu)
Status: New => In Progress
** Changed in: mutter (Ubuntu Oracular)
Status: New => In Progress
** Changed in: mutter (Ubuntu)
Assignee: (unassigned) => Alessandro Astone (aleasto)
** Changed in: mutter (Ubuntu Oracular)
Assignee: (unassigned) => Alessandro Astone (aleasto)
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https://bugs.launchpad.net/bugs/2089843
Title:
Applications stop receiving touch updates when the finger moves
outside of the window
Status in mutter package in Ubuntu:
In Progress
Status in mutter source package in Oracular:
In Progress
Bug description:
[ Impact ]
A touchscreen input sequence is supposed to "grab" onto the window
where the action started, so that even when moving the finger outside
of the window updates are still sent to it. Instead, as the finger
leaves the surface of the window, that stops receiving all touch
updates and does not even receive a finish event.
[ Test Case ]
1. Open the Nautilus file manager
2. Navigate to a directory with many files
3. Switch to the vertical "List View"
4. Start scrolling with the touchscreen
5. While scrolling, let the finger leave the surface of the window to its
right
7. Verify that Nautilus keeps scrolling even with the finger outside the
window
[ Where problems could occur ]
mutter is the Wayland compositor library that provides graphics and inputs
for the GNOME desktop, thus is a critical component.
Problems could manifest with touch input not working anymore, or sudden
log-out if gnome-shell crashes.
The change is limited to touchscreen handling, and won't ever affect a system
without touchscreen.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2089843/+subscriptions
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