Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
   * What was the outcome of this action?
   * What outcome did you expect instead?

*** End of the template - remove these template lines ***

Hi Salvatore,

thanks for the reports, and sorry for the very late reply. #1107963 and
#1107965 describe the same problem, so I have merged them and reassigned
them to cinnamon-session, where the fix belongs.

I could reproduce it on trixie (cinnamon-session 6.4.0-1,
cinnamon-settings-daemon 6.4.3-1, systemd 257.13-1~deb13u1) and on
unstable (cinnamon-session 6.6.4-1, systemd 262). This is what happens:

- while playing, Rhythmbox asks the session not to suspend (its Power
Manager plugin is built in and always active);
- cinnamon-session turns that request into a logind inhibitor lock on
"sleep" in "block" mode;
- when the lid is closed, cinnamon-settings-daemon locks the screen and
asks logind to suspend.

Up to systemd 256, logind ignored block locks taken by the same user who
requested the suspend, so this worked. Since systemd 257 logind always
obeys them: the suspend request is refused ("Access denied") and the
laptop stays on with the screen locked. The same happens with any
application that inhibits suspend, not only Rhythmbox.

systemd 257 also added a "block-weak" mode that keeps the old behaviour,
and with a lock in that mode closing the lid suspends the system again
(tested on both, with cinnamon-session rebuilt with that change). I have
proposed upstream that cinnamon-session use it [2]. The upstream issue
[1] reports the same root cause.

Until then, pausing Rhythmbox before closing the lid avoids the problem:
the plugin releases its lock as soon as playback stops.

[1] https://github.com/linuxmint/cinnamon/issues/13219
[2] https://github.com/linuxmint/cinnamon-session/pull/219

Regards,
Fabio

Hello,

Bug #1107965 in cinnamon-session reported by you has been fixed in the
Git repository and is awaiting an upload. You can see the commit
message below and you can check the diff of the fix at:

https://salsa.debian.org/cinnamon-team/cinnamon-session/-/commit/b474c937ea5cde9b83ce2a097809929164bf69bc
------------------------------------------------------------------------
d/patches: take the session's logind inhibitor in block-weak mode

Since systemd 257 logind always obeys "block" inhibitors, also those
held by the user who requests the operation. The "sleep:shutdown"
inhibitor that cinnamon-session takes on behalf of applications
inhibiting suspend (Rhythmbox while playing, browsers playing media)
therefore blocks the session itself: closing the lid no longer suspends
the laptop, the end-session dialog stops offering suspend, restart and
shut down, and even "systemctl reboot" is refused while the application
runs.

Backport of upstream commit 2f256e0 (linuxmint/cinnamon-session#219):
the inhibitor is taken in "block-weak" mode, which keeps the previous
semantics, and falls back to "block" on logind/elogind versions that
don't support it. Suspend on idle still honours the inhibitors, since
csd-power checks them itself.

Closes: #1107963, #1107965

Assisted-by: Claude Code:claude-opus-5-5
------------------------------------------------------------------------

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/1107965

We believe that the bug you reported is fixed in the latest version of
cinnamon-session, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1107963@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Fabio Fantoni <fantonifabio@tiscali.it> (supplier of updated cinnamon-session package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Fri, 16 Oct 2026 21:28:13 +0200
Source: cinnamon-session
Built-For-Profiles: noudeb
Architecture: source
Version: 6.6.4-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Cinnamon Team <debian-cinnamon@lists.debian.org>
Changed-By: Fabio Fantoni <fantonifabio@tiscali.it>
Closes: 835846 1107963 1107965
Changes:
 cinnamon-session (6.6.4-2) unstable; urgency=medium
 .
   * d/patches:
     - use the running user D-Bus session bus instead of dbus-launch
     (Closes: #835846)
     - main.c-Report-the-failure-when-dbus-launch-cannot-be-exec.patch
     - take the session's logind inhibitor in block-weak mode
     (Closes: #1107963, #1107965)
   * d/rules: include architecture.mk
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We believe that the bug you reported is fixed in the latest version of
cinnamon-session, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1107965@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Fabio Fantoni <fantonifabio@tiscali.it> (supplier of updated cinnamon-session package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Fri, 16 Oct 2026 21:28:13 +0200
Source: cinnamon-session
Built-For-Profiles: noudeb
Architecture: source
Version: 6.6.4-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Cinnamon Team <debian-cinnamon@lists.debian.org>
Changed-By: Fabio Fantoni <fantonifabio@tiscali.it>
Closes: 835846 1107963 1107965
Changes:
 cinnamon-session (6.6.4-2) unstable; urgency=medium
 .
   * d/patches:
     - use the running user D-Bus session bus instead of dbus-launch
     (Closes: #835846)
     - main.c-Report-the-failure-when-dbus-launch-cannot-be-exec.patch
     - take the session's logind inhibitor in block-weak mode
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   * d/rules: include architecture.mk
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