Bug#777269: more info

[Michael Biebl]

control: tags -1 moreinfo unreproducible

Am 08.02.2015 um 20:20 schrieb Nicolas Kuttler:
> After some investigation it turns out that this problem is more
> widespread than I had thought. KDE and XFCE both make power management
> configurable, and both have other default actions for the power button.
> XFCE asks the user what to do, KDE displays the log out dialog.
> 
> To reproduce install kde-plasma-netbook (or another metapackage), xfce4
> and xfce4-goodies. Both have power management settings. I have attached
> two screenshots of those settings options in the default configuration.
> 
> I did not test more desktop environments (mate, cinnamon..), but it's
> possible that they do similar things. In those cases no user interaction
> is necessary to change the previous behavior in a way that can lead to
> data loss.
> 
> This bug also seems to be the cause of #776422 which you might want to
> merge.
> 
> Just mentioning this in the release notes might not be enough. I don't
> know if there is a debconf note about porting init scripts to systemd,
> but if there is this change should maybe be displayed as prominently.
> It might affect less users but the consequences can be more severe than
> services not starting.
> 
> It might be a good idea to involve the DDs of various desktop
> environments to see who is affected.


I can't reproduce any of this (on an up-to-date jessie system).

Xfce
====
When logged into an Xfce session, I have the following output from
systemd-inhibit:

     Who: NetworkManager (UID 0/root, PID 23444/NetworkManager)
    What: sleep
     Why: NetworkManager muss Netzwerke abschalten
    Mode: delay

     Who: xfce4-power-manager (UID 1001/test, PID 2545/xfce4-power-man)
    What:
handle-power-key:handle-suspend-key:handle-hibernate-key:handle-lid-switch
     Why: xfce4-power-manager handles these events
    Mode: block

     Who: Telepathy (UID 1001/test, PID 2634/mission-control)
    What: shutdown:sleep
     Why: Disconnecting IM accounts before suspend/shutdown...
    Mode: delay

3 inhibitors listed.

xfce4-power-manager correctly takes the inhibitor locks as outlined in
[1] and whatever action is configured to happen on various events is
correctly executed. For testing purposes I set the action on power
button press to ignore, and the result was, that simply nothing happened.

Gnome
=====

$ systemd-inhibit
     Who: Telepathy (UID 1000/michael, PID 3522/mission-control)
    What: shutdown:sleep
     Why: Disconnecting IM accounts before suspend/shutdown...
    Mode: delay

     Who: GNOME Shell (UID 1000/michael, PID 3544/gnome-shell)
    What: sleep
     Why: GNOME muss den Bildschirm sperren
    Mode: delay

     Who: NetworkManager (UID 0/root, PID 23444/NetworkManager)
    What: sleep
     Why: NetworkManager muss Netzwerke abschalten
    Mode: delay

     Who: michael (UID 1000/michael, PID 3471/gnome-settings-)
    What: sleep
     Why: GNOME needs to lock the screen
    Mode: delay

     Who: michael (UID 1000/michael, PID 3471/gnome-settings-)
    What: handle-power-key:handle-suspend-key:handle-hibernate-key
     Why: GNOME handling keypresses
    Mode: block

5 inhibitors listed.

gnome-settings-daemon correctly takes the inhibitor locks and everything
works as configured in gnome-control-center

KDE
===
$ systemd-inhibit
     Who: NetworkManager (UID 0/root, PID 23444/NetworkManager)
    What: sleep
     Why: NetworkManager muss Netzwerke abschalten
    Mode: delay

     Who: Telepathy (UID 1001/test, PID 3214/mission-control)
    What: shutdown:sleep
     Why: Disconnecting IM accounts before suspend/shutdown...
    Mode: delay

     Who: PowerDevil (UID 1001/test, PID 2982/kded4)
    What:
handle-power-key:handle-suspend-key:handle-hibernate-key:handle-lid-switch
     Why: KDE handles power events
    Mode: block

3 inhibitors listed.


Same picture here, KDE works just as configured in the desktop session

acpi-support
============

acpi-support checks if systemd-logind is in use, and exits in this case.
See /etc/acpi/powerbtn-acpi-support.sh:

if { CheckPolicy || HasLogindAndSystemd1Manager; }; then
	exit 0
fi


As far as I could test, everything just works.



[1] http://www.freedesktop.org/wiki/Software/systemd/inhibit/
-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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