Public bug reported:
Steps to reproduce:
0. Open terminal with `tail -f ~/.xsession-errors`
1. Open mate-appearance-properties , switch theme, change background
2. Open mate-tweak, change window manager to "Marco (no compositor)" or back to
"Marco (adaptive compositor)"
3. Go back to mate-appearance-properties , switch theme, change background
Expected results:
* theme, background and window manager switched, no errors shown in
~/.xsession-errors .
Actual results:
* the ~/.xsession-errors have serious flood with messages like
```
Window manager warning: Log level 128: unsetenv() is not thread-safe and should
not be used after threads are created
Window manager warning: Screen 0 on display ":0" already has a window manager;
try using the --replace option to replace the current window manager.
Window manager warning: Log level 8: g_main_loop_is_running: assertion 'loop !=
NULL' failed
Window manager warning: Log level 128: unsetenv() is not thread-safe and should
not be used after threads are created
Window manager warning: Screen 0 on display ":0" already has a window manager;
try using the --replace option to replace the current window manager.
Window manager warning: Log level 8: g_main_loop_is_running: assertion 'loop !=
NULL' failed
...
```
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: mate-tweak 20.04.0-2
ProcVersionSignature: Ubuntu 5.8.0-18.19-generic 5.8.4
Uname: Linux 5.8.0-18-generic x86_64
ApportVersion: 2.20.11-0ubuntu45
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Sun Sep 13 18:42:58 2020
InstallationDate: Installed on 2020-09-13 (0 days ago)
InstallationMedia: Ubuntu-MATE 20.10 "Groovy Gorilla" - Alpha amd64 (20200913)
PackageArchitecture: all
SourcePackage: mate-tweak
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: marco (Ubuntu)
Importance: Undecided
Status: New
** Affects: mate-control-center (Ubuntu)
Importance: Undecided
Status: New
** Affects: mate-tweak (Ubuntu)
Importance: Undecided
Status: New
** Affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug groovy
** Also affects: marco (Ubuntu)
Importance: Undecided
Status: New
** Also affects: mate-control-center (Ubuntu)
Importance: Undecided
Status: New
** Also affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1895460
Title:
mate-appearance-properties or mate-tweak causes flood of ~/.xsession-
errors with Window manager warning: Log level 8:
g_main_loop_is_running: assertion 'loop != NULL' failed
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/marco/+bug/1895460/+subscriptions
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