This is getting confusing because the Yaru theme is changing faster than
we can release fixes to correct the related transitions.
To address this confusion, let this bug be about 18.10 only. I have
opened bug 1813119 to address the new problem in 19.04.
** Summary changed:
- The wrong background flashes up briefly during the login animation since Yaru
was introduced
+ In Ubuntu 18.10, the wrong background flashes up briefly during the login
animation (since Yaru was introduced)
** Changed in: mutter (Ubuntu Cosmic)
Status: Triaged => In Progress
** Changed in: mutter (Ubuntu)
Status: In Progress => Won't Fix
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https://bugs.launchpad.net/bugs/1789356
Title:
In Ubuntu 18.10, the wrong background flashes up briefly during the
login animation (since Yaru was introduced)
Status in gnome-shell package in Ubuntu:
Fix Released
Status in mutter package in Ubuntu:
Won't Fix
Status in gnome-shell source package in Cosmic:
Fix Released
Status in mutter source package in Cosmic:
In Progress
Bug description:
[Impact]
The wrong background flashes up briefly (for a split second) during the login
animation.
The login screen and gnome-shell's system background are meant to be the same
image so that the login procedure can VT switch without the user noticing. Then
the final desktop expands over the system background. However it appears the
login background and system background are not the same image any more, causing
a visible glitch during login.
[Test Case]
1. Install new version, logout
2. Log in into GDM
-> Check that at login startup, the background matches GDM ones (same color,
same gradient)
3. Logout, install gnome-session
4. Reboot so that GDM takes gnome-session into account
5. Select GNOME session and login
-> At login startup, the background will matche the GNOME default one (from
the lockscreen: grey noise), which matches GDM one if reset to default GNOME
via update-alternatives.
[Regression Potential]
This code is loaded at session startup, if there is a syntax error, the
session wouldn't start at all.
This has been of course tested before committed (both on ubuntu and GNOME
sessions)
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: yaru-theme-gnome-shell 18.10.2
ProcVersionSignature: Ubuntu 4.17.0-7.8-generic 4.17.12
Uname: Linux 4.17.0-7-generic x86_64
ApportVersion: 2.20.10-0ubuntu9
Architecture: amd64
Date: Tue Aug 28 14:19:48 2018
Dependencies:
InstallationDate: Installed on 2018-05-26 (93 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180525)
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_AU.UTF-8
SHELL=/bin/bash
SourcePackage: yaru-theme
UpgradeStatus: No upgrade log present (probably fresh install)
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