Lockscreen multiscreen behavior

[David Kahles]

On 06/17/2015 05:30 AM, Martin Gräßlin wrote:
> Am 2015-06-16 16:58, schrieb David Kahles:
>> Hello,
>> I want to hear some opinions about the multiscreen behavior of the 
>> lockscreen.
>>
>> Currently the lockscreen is displayed on all connected monitors. I
>> would prefer if the
>> lockscreen is displayed only on the primary monitor, as it's done at
>> the loginscreen,
>> because there is no need for multiple instances.
>> I think this also matches the behavior of other operating
>> systems/desktop environments.
>>
>> What do you think?
>
> When we redid the lockscreen to be in QML with the lock always shown 
> we did it that way on purpose. The main problem is that we don't know 
> which screen the user is expecting it to be on. Even more we don't 
> know whether the primary screen is actually the user's primary screen. 
> We cannot expect users to configure it as they use it.
>
> Easy example: notebook, external screen connected, internal screen is 
> obviously the primary screen as it's a notebook. Now user closes the 
> lid, screen stays configured to be on and locks the screen: at that 
> point user has a broken system because lock screen is not shown any 
> more. User might even try to hard turn off the system at that point, 
> because user doesn't even think of the idea the closed notebook screen 
> could have the locker.
>
> So overall: if we want to be sure that users always can lock in again, 
> we need to show on all screens.
That makes sense, it could save much trouble.
Out of curiosity: why should the monitor in the closed lid be configured 
to stay on? The only reason that
comes to my mind is, when the lid-closed sensor is broken.

David