no lock screen immediately after resume (delayed)

[Andreas E.]

When resuming from stand-by, I get to an editable desktop, ie. I can open/close programs, change volume etc. After some seconds the lock screen appears delayed and asks me for a password.
(Of course this defeats the purpose of having a lock screen. The desktop should probably be started after the lock screen appears, or at least not be editable until the password has been entered.)

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: acpi (not installed)
ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
Uname: Linux 3.5.0-19-generic i686
ApportVersion: 2.6.1-0ubuntu6
Architecture: i386
Date: Mon Dec 10 09:34:07 2012
MarkForUpload: True
SourcePackage: acpi
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ricardo Pascua Jr (rdpascua)]

I'm also experiencing this bug under Ubuntu 12.10.

[Nick Doylend (ndoylend-x)]

This appears to be the same problem (affecting 13.04):
https://mail.gnome.org/archives/gnome-shell-list/2013-May/msg00121.html

It affects my install of 12.04 LTS.

[riban (brian-riban)]

This issue persists in Ubuntu 14.04 LTS. It seems surprising that only 4 of us have flagged this as affecting them when I believe it to be a known issue. (It was discussed on UK Ubuntu Podcast several months ago.) It was introduced a few releases ago and presents a security risk. Is it reported under another ticket? (I haven't found one.) Why is the screen lock not being applied before sleep rather than after wake?

[riban (brian-riban)]

There seems to be a solution (work-around) here: http://askubuntu.com/questions/180594/resume-to-login-screen-after-suspend/270598#270598. This describes how to show the (nicer) ubuntu login screen before suspend / hibernate. Must disable "Lock screen when going for suspend/hibernate" option in power manager settings.

[Law (lawputtergill)]

This bug also seems to affect machine's in a locked state. When I return to my PC after locking it (without suspending) and the monitor is off, it takes a few moments for the lock screen to appear. During this time the desktop is both viewable and editable. This is quite a security concern.

[Dreamless Guardsman (dreamless+guardsman)]

This bug is present in Ubuntu 15.4. I've also experienced identical behavior in Mint.

I have frequently been able to observe information on a monitor or operate the keyboard and mouse within a session for a couple of seconds between when the monitor wakes and when the screen lock intervenes.

What concerns me most about this bug is that it allows an knowledgeable lurker a peek into a system every time it is left unattended, even if the screen turns off due to inactivity.

[Taleb Abdelhak (my-rk)]

I've experienced this bug ever since i started using Ubuntu, it's present in all version starting from 12.04, i think it's important to fix it as soon as possible.

[revilla (revilla)]

The issue is still present on ubuntu 16.10

[David Baumann (davidbaumann)]

Still present in 17.04

Especially, if the cursor is within virtual box, it locks after leaving virtual box only.

Really bad.