[Bug 243618] New: Powerdevil does not trigger new lid action when profile changes CancelOk

[Ryan Thompson]

https://bugs.kde.org/show_bug.cgi?id=243618

           Summary: Powerdevil does not trigger new lid action when
                    profile changes CancelOk
           Product: kde
           Version: unspecified
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: rct+bugs at thompsonclan.org


Version:           unspecified (using KDE 4.4.4) 
OS:                Linux

Assume the following power configuration, which is a simplification of the KDE
default:

- There are two power profiles, "AC" and "Battery".
- When the AC adapter is plugged in, the system is configured to switch to the
"AC" profile.
- When the adapter is unplugged, the system is configured to switch to the
"battery" profile.
- In, the AC profile, when the lid is closed, the system locks the screen.
- In the Battery profile, when the lid is closed, the system goes into sleep
mode (suspends to RAM).

With this setup, if I unplug the laptop and then close the lid, the laptop will
suspend, as expected. However, if I close the lid *first* and then unplug the
laptop, the screen will lock, and the laptop will *not* suspend. This is
because the lid is closed while the AC power profile is active. When the
adapter is unplugged afterward, the power profile is switched to Battery, but
this does not trigger the appropriate lid action from the Battery profile.

In GNOME, there is a hidden gconf setting to fix this problem, but it seems
that there is no such setting in KDE.

A possible workaround is to configure the system to emit an ACPI lid event
whenever the AC adapter is unplugged, but I don't know how to do this.

Reproducible: Always

Steps to Reproduce:
1. Make sure your Powerdevil configuration matches the one above closely
enough. The default settings should be fine.
2. Unplug the laptop, then close the lid. It should suspend, as expected. (This
is to verify that things are working normally.)
3. Open the lid, resume the laptop, plug it in, and unlock the screen.
4. Now, close the lid *first*, and then unplug. 

Actual Results:  
The screen is locked, but the laptop does not suspend.

Expected Results:  
The laptop should suspend (i.e. suspend to RAM).

The problem is that Powerdevil does not re-trigger any lid action when changing
profiles. If the lid is closed and the profile is changed automatically,
Powerdevil should trigger the new profile's lid action, rather than do nothing.
This should probably *not* happen if the profile is changed manually.

Also, as mentioned, GNOME has a hidden gconf key to enable this or disable it.
If this is implemented, there should probably be a similar option to disable
it, because it could certainly cause breakage or unexpected behavior for some
people.

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