Ubuntu

Lock screen shows a dimmed desktop

Asked by James Gauth

Whenever my screen locks (with the lock screen icon, ctrl-alt-l or after a period of time), the screen fades to black but then shows a dimmed version of the desktop.

If I wait until the dimmed screen is shown and move the mouse to pop up the unlock dialogue, then cancel the dialogue, the correct blanked background is shown.

The bug seems related to the following:
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/160264
(near the end of the bug report people are seeing the same effect)

I can't find a specific bug report detailing this problem, should I open one?

Prior to a month or two ago, locking the screen used to blank it properly. I find myself locking my screen and walking away from my computer only to return with my desktop still visible (although slightly dimmed).

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Ben Klein (kleinb1) said : 		#1

Try selecting a different screen saver. Otherwise, your ad-hoc solution (popping up the unlock dialogue and cancelling it) sounds like it should work.

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James Gauth (james-gauth) said : 		#2

I would like my screen to blank, it's what should happen.

Popping up the unlock dialogue and cancelling it just illustrates that there's an inconsistency between initial blanking and blanking that takes place after the dialogue goes away.

I've tried changing my Compiz configuration to see if it affects anything. When I disable animations and window fading in ccsm, initial blanking doesn't work at all (ie. locking the screen makes it fade, then shows my entire desktop as-is, no dimming at all).

If I go to the Screensaver preferences, select 'Blank screen' as my screensaver and then click Preview, the first-time preview is completely transparent. If I cancel the preview and then click Preview again, it shows a black (blank) preview.

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