Pressing power button unlocks locked screensaver

Can't confirm on i386 - however, if I press the power button, the logout
dialog will come up after the screen is unlocked. Having pressed it
several times, the dialog come up over and over again. So I agree that
the power button should be completely disabled when the screen is
locked.

I can confirm this on amd64. I today independantly also discovered this issue, and it's to say the least - embarrasing.

This is a major issue, I'm confirming this.

Same experience as Dennis here. Might make sense to trap all such things when the screen is locked.

I have a similar experience:
System -> Lock Screen
Then I close the portatil computer and open it: no password is needed!!

(i have dapper drake amd64 on a acer aspire)

Sorry for my english.

Can't confirm on 386

This doesn't happen to me (using Flight 6 on MSI S250 laptop).

I tested this by locking the screen and suspending the machine with sleep button. Also hibernated it via lid close. Both times when I resumed the session the lock screen came right back.
Power button did not have any action here.

I have a related problem though:

It is set in the /etc/default/acpi-support that the machine should automatically lock the screen on resume:

# Comment this out to disable screen locking on resume
LOCK_SCREEN=true

However this does not happen. Why?

I found out how to enable the screen locking on resume. It is done by setting the locking on when screensaver is active.

However there are other problems with this setting. After resume, when I have entered my password and the screen unlocks the next thing that happens is that the same screen pops up which comes when pressing the power button. From there I have to push the Cancel to get my desktop back.

So it seems there are still unsettled issues with this gnome-screensaver.

Oliver, if true, this is serious. Please look into it.

it doesnt happen on my ibook here, i can lock the screen with the lock screen menu item, if i press the power button, that brings up the unlock dialog. unlocking doesnt show the logout dialog or anything here. also pressing the powerbutton multiple times doesnt chage that behavior.

All of the issues mentioned above seem to be fixed at this point.
There is still one thing worth mentioning before setting this bug as fixed:

When the screen is locked and you press the power button, no pop-up screen is displayed, which is good. But when the password has been entered and the screen unlocks, then the pop-up appears. It only appears if you pressed the power key during the screen lock.

Moreover, if you pressed the power key more than once, the pop-up will reappear after you have selected Cancel. So you have to press Cancel again. This happens as many times as you have pressed the power button. I tried it twice and then three times and so on.

So this is not fixed yet, although it should not be Major anymore. I suggest lowering the severity to normal at this point.

good suggestion :)

still, if somebody for administrative reasons, needs to shut down a computer,
reasons ranging from planned power interruptions to office relocations,
it still is nice being able to let somebody shut down the computer in
an orderly fashion.

Hence, the problem was not that a shutdown option was presented
when pressing the power button, the problem was that flicking the
power switch could give somebody full access to the locked
desktop.

It may be that I grew up when power buttons actually had
something to do with the power supply of the device at hand,
but Ubuntu is for "ordinary people" and many such people
still think that the reason for the power switch is switching
the power in a similar way as their light switch is working.

To cater for this conservative mindset, a good workaround
would be skipping the questions about if logout etc and instead
present a simple shutdown yes/no question. OK, that adds
complexity compared to silently bring the machine to a halt,
but it may still save some trouble when the button is pressed
by accident.

If I press the power button while the screen is locked, the "Shutdown the computer" menu comes up (but behind the screen lock - I have to unlock the screen to see it). The bad part is that it informs me it will log me off in 60 seconds, so that means that someone could log me off right from the lock screen.

I can confirm what Chris wrote on 9.04, without compiz

I can not reproduce this in 11.04 with Unity and 9.04 is no longer supported. Can anybody reproduce this in any current versions (like the LTS)?

can't reproduce in 10.04 and 11.04, amd64.