Bug 397690

Summary:	Cannot lock screen with Ctrl+Alt+L when desktop context menu is displayed
Product:	[Unmaintained] kscreenlocker	Reporter:	Bob Mahar <bob>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED INTENTIONAL
Severity:	minor	CC:	bshah, kde, trmdi
Priority:	NOR
Version First Reported In:	5.10.3
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Bob Mahar 2018-08-21 02:58:27 UTC

Presumably this is because of the age old X Windows shenanigans of context windows having a lock on the screen semaphore, preventing the screen from being locked.   Given Bug https://bugs.kde.org/show_bug.cgi?id=284357, the desktop context menu probably should not refer to a keyboard shortcut known not to work from a context menu.

To reproduce:

Right clock in desktop area.
Context menu appears with Screnn Lock menu option showing Ctrl+Alt+L shortcut.
On pressing Ctrl+Alt+L, nothing happens, not is an error generated.

Comment 1 David Edmundson 2018-08-21 09:16:41 UTC

>Presumably this is because of the age old X Windows shenanigans of context windows

Not just that, they grab the keyboard preventing global shortcuts.

> should not refer to a keyboard shortcut known not to work from a context menu.

We show it so users then know the shortcut for future. It's a common pattern across menus. I don't think there's anyone who opens a shortcut menu, then halfway switches to using a global shortcut.