Window titlebar and shadow flickers when scrubbing through menus (or when a tooltip appears)

Bug #1662733 reported by Daniel van Vugt on 2017-02-08
18
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Canonical System Image
Undecided
Unassigned
Mir
Confirmed
Medium
Unassigned
MirAL
Undecided
Unassigned
mir (Ubuntu)
Medium
Unassigned
unity8 (Ubuntu)
Undecided
Unassigned

Bug Description

Application titlebar and shadow flickers when scrubbing through menus, or when a tooltip appears.

Test case:
  1. $ sol -- --desktop_file_hint=unity8
  2. Click on a menu and move the mouse horizontally to the next menu.

Expected: No change in the app window's title bar or shadow.
Observed: Flickering in the app title bar and shadow on every menu change.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: unity8 8.15+17.04.20170206-0ubuntu1
ProcVersionSignature: Ubuntu 4.9.0-15.16-generic 4.9.5
Uname: Linux 4.9.0-15-generic x86_64
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Feb 8 09:55:14 2017
InstallationDate: Installed on 2016-11-03 (97 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20161102)
SourcePackage: unity8
UpgradeStatus: No upgrade log present (probably fresh install)
upstart.unity8-dash.log: [2017-02-08:09:55:07.500] "clickscope" : setActive: true

*NOTE*: similar cause, but different usecase to lp:1625846

Daniel van Vugt (vanvugt) wrote :
tags: added: unity8-desktop visual-quality
summary: Application titlebar and shadow flickers when scrubbing through menus
+ (or when a tooltip appears)
description: updated
summary: - Application titlebar and shadow flickers when scrubbing through menus
- (or when a tooltip appears)
+ Window titlebar and shadow flickers when scrubbing through menus (or
+ when a tooltip appears)
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in unity8 (Ubuntu):
status: New → Confirmed
Changed in canonical-devices-system-image:
status: New → Confirmed
Daniel van Vugt (vanvugt) wrote :

Looks like this is similar to bug 1625846.

Mir lacks a client API allowing clients to flag that certain surfaces (of the app's choice, not defined by the surface type) should not receive focus and thus should never take focus away from the app window.

Alan Griffiths (alan-griffiths) wrote :

Agreed, this is the same underlying issue with "focus-loss" events that manifests in lp:1625846. We should ensure that any plan to resolve addresses both usecases.

Changed in mir:
status: New → Confirmed
Changed in miral:
status: New → Incomplete
Changed in mir:
importance: Undecided → Medium
description: updated
Changed in unity8 (Ubuntu):
status: Confirmed → Incomplete
Michał Sawicz (saviq) wrote :

Syncing task from Mir.

Changed in mir (Ubuntu):
importance: Undecided → Medium
status: New → Confirmed
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